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Mechanical Drawing Symbols

Mechanical Drawings are the special type of technical diagrams that visualize the structure of complex systems and illustrate the information about ventilation, heating, air conditioning, i.e. HVAC systems. These drawings are created on the base of floor plans and reflected ceiling plans, and then become an obligatory part of construction project which is needed directly for construction a building and for receiving a permit on it. Mechanical drawings and diagrams help effectively represent construction, technical and engineering solutions, and also schematics of different mechanical equipment. ConceptDraw DIAGRAM ector drawing software enhanced with Mechanical Engineering solution from Engineering area of ConceptDraw Solution Park provides wide set of effective drawing tools, predesigned mechanical drawing symbols, templates, samples and examples. Use of standardized and recognized mechanical vector symbols helps you design understandable mechanical drawings, diagrams and mechanical engineering schematics.

Electrical Symbols, Electrical Diagram Symbols

When drawing Electrical Schematics, Electrical Circuit Diagrams, Power Systems Diagrams, Circuit and Wiring Diagrams, Digital and Analog Logic Schemes, you will obligatory need the electrical symbols and pictograms to represent various electrical and electronic devices, such as resistors, wires, transistors, inductors, batteries, switches, lamps, readouts, amplifiers, repeaters, relays, transmission paths, semiconductors, generators, and many more. Today these symbols are internationally standardized, so the diagrams designed using them are recognizable and comprehensible by specialists from different countries. Electrical Engineering Solution included to ConceptDraw Solution Park provides 26 libraries with 926 commonly used electrical schematic and electrical engineering symbols making the reality the easy drawing of Electrical diagrams, schematics and blueprints. Now you need only a few minutes to create great-looking Electrical diagram, simply choose required electrical design elements from the libraries, drag them on the needed places at the document and connect in a suitable way.

Process Flow Diagram Symbols

Chemical and Process Engineering Solution from the Industrial Engineering Area of ConceptDraw Solution Park is a unique tool which contains variety of predesigned process flow diagram symbols for easy creating various Chemical and Process Flow Diagrams in ConceptDraw DIAGRAM.

Electrical Symbols — Inductors

An inductor, also called a coil or reactor, is a passive two-terminal electrical component which resists changes in electric current passing through it. It consists of a conductor such as a wire, usually wound into a coil. Energy is stored in a magnetic field in the coil as long as current flows. When the current flowing through an inductor changes, the time-varying magnetic field induces a voltage in the conductor, according to Faraday’s law of electromagnetic induction. 26 libraries of the Electrical Engineering Solution of ConceptDraw DIAGRAM make your electrical diagramming simple, efficient, and effective. You can simply and quickly drop the ready-to-use objects from libraries into your document to create the electrical diagram.
This engineering drawing present weld type symbols and fillet weld symbols.
The weld type symbol is typically placed above or below the center of the reference line, depending on which side of the joint it's on. The symbol is interpreted as a simplified cross-section of the weld.
"Fillet welding refers to the process of joining two pieces of metal together whether they be perpendicular or at an angle. These welds are commonly referred to as Tee joints which are two pieces of metal perpendicular to each other or Lap joints which are two pieces of metal that overlap and are welded at the edges. The weld is aesthetically triangular in shape and may have a concave, flat or convex surface depending on the welder’s technique. Welders use fillet welds when connecting flanges to pipes, welding cross sections of infrastructure, and when fastening metal by bolts isn't strong enough." [Fillet weld. Wikipedia]
The engineering drawing example Welding symbols is included in the Mechanical Engineering solution from Engineering area of ConceptDraw Solution Park.
Welding joint symbols
Welding joint symbols, square groove, insert, consumable insert, flare bevel groove, flared-bevel groove, flare V groove, flared-V groove, fillet, weld, cutaway, revealing detail, bevel groove, back, backing, arrow, V-groove, U-groove, J-groove,

Electrical Symbols — Terminals and Connectors

An electrical connector, is an electro-mechanical device used to join electrical terminations and create an electrical circuit. Electrical connectors consist of plugs (male-ended) and jacks (female-ended). The connection may be temporary, as for portable equipment, require a tool for assembly and removal, or serve as a permanent electrical joint between two wires or devices. 26 libraries of the Electrical Engineering Solution of ConceptDraw DIAGRAM make your electrical diagramming simple, efficient, and effective. You can simply and quickly drop the ready-to-use objects from libraries into your document to create the electrical diagram.
The vector stencils library "Qualifying" contains 56 qualifying symbols of radiation, polarity, phase, windings, wire, ground, connection, connector, coaxial, electret.
Use these signs to annotate or specify characteristics of objects in electrical drawings, electronic schematics, circuit diagrams, electromechanical drawings, and wiring diagrams, cabling layout diagrams.
"An electrical drawing, is a type of technical drawing that shows information about power, lighting, and communication for an engineering or architectural project. Any electrical working drawing consists of "lines, symbols, dimensions, and notations to accurately convey an engineering's design to the workers, who install the electrical system on the job".
A complete set of working drawings for the average electrical system in large projects usually consists of:
(1) A plot plan showing the building's location and outside electrical wiring.
(2) Floor plans showing the location of electrical systems on every floor.
(3) Power-riser diagrams showing panel boards.
(4) Control wiring diagrams.
(5) Schedules and other information in combination with construction drawings.
Electrical drafters prepare wiring and layout diagrams used by workers who erect, install, and repair electrical equipment and wiring in communication centers, power plants, electrical distribution systems, and buildings." [Electrical drawing. Wikipedia]
The signs example "Design elements - Qualifying" was drawn using the ConceptDraw PRO diagramming and vector drawing software extended with the Electrical Engineering solution from the Engineering area of ConceptDraw Solution Park.
Qualifying symbols
Qualifying symbols, special connector, cable indicator, radiation, radiation travel, direction, positive polarity, phase, windings, wire, connection, zigzag, phase, windings, wire, connection, star, phase, windings, wire, connection, polygon, phase, windings, wire, connection, fork, phase, windings, wire, connection, double star, phase, windings, wire, connection, double delta, phase, windings, wire, connection, delta, phase, windings, wire, connection, neutral, conductor, negative polarity, multiple-phase, electret, coaxial line, coaxial,
The vector stencils library "Dimensioning and tolerancing" contains 45 symbols of geometric dimensions and mechanical tolerances, geometric symbols, callouts, and text boxes and inserts.
Use these geometric dimensioning and tolerancing (GD&T) shapes to create annotated mechanical drawings in the ConceptDraw PRO diagramming and vector drawing software extended with the Mechanical Engineering solution from the Engineering area of ConceptDraw Solution Park.
www.conceptdraw.com/ solution-park/ engineering-mechanical
Datum (old)
Datum (old),
Box callout
Box callout, callout,
Datum symbol
Datum symbol, datum, reference, circle,
Callout
Callout, callout,
All around callout
All around callout, callout,
Text block
Text block, text block,
2 datum frame
2 datum frame, datum, feature control,
Simple frame
Simple frame,
Basic frame
Basic frame,
1 datum frame
1 datum frame, datum, feature control,
3 datum frame
3 datum frame, datum, feature control,
Straightness
Straightness, straightness,
Flatness
Flatness, flatness,
Line profile
Line profile, line profile,
Circularity
Circularity, circularity,
Cylindricity
Cylindricity, cylindricity,
Surface profile
Surface profile, surface profile,
Position
Position, position, positioning,
Concentricity
Concentricity, concentricity,
Symmetry
Symmetry, symmetry,
Parallelism
Parallelism, parallelism,
Perpendicularity
Perpendicularity, perpendicularity,
Angularity
Angularity, angularity,
Material condition
Material condition, material condition,
Arc length
Arc length, arc length,
Diameter
Diameter, diameter,
Counterbore/ spotface
Counterbore/ spotface, counterbore, spotface,
Countersink
Countersink, countersink,
Depth
Depth, depth,
Slope
Slope, slope,
Conical taper
Conical taper, conical taper,
Statistical tolerance
Statistical tolerance, statistical tolerance,
Datum (new)
Datum (new), datum,
Datum (new) 2
Datum (new) 2, datum,
Target point
Target point, datum target, point,
Target line
Target line, datum target, line,
Target area (circle)
Target area (circle), datum target, area,
Target area (rectangle)
Target area (rectangle), datum target, area,
Total runout
Total runout, total runout,
Total runout 2
Total runout 2, total runout,
Circular runout
Circular runout, circular runout,
Circular runout 2
Circular runout 2, circular runout,
Surface finish
Surface finish, surface, finish, roughness,
Surface finish, removal process
Surface finish, removal process, surface, finish, roughness,
Surface finish, no process permitted
Surface finish, no process permitted, surface, finish, roughness,
Retract resistor check valve application: pneumatic cylinder, piston driven by Compressed air through 2 Retract resistor check valves.
"A check valve, clack valve, non-return valve or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction.
Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide variety of applications. Check valves are often part of common household items. Although they are available in a wide range of sizes and costs, check valves generally are very small, simple, or inexpensive. Check valves work automatically and most are not controlled by a person or any external control; accordingly, most do not have any valve handle or stem. The bodies (external shells) of most check valves are made of plastic or metal.
An important concept in check valves is the cracking pressure which is the minimum upstream pressure at which the valve will operate. Typically the check valve is designed for and can therefore be specified for a specific cracking pressure.
Heart valves are essentially inlet and outlet check valves for the heart ventricles, since the ventricles act as pumps." [Check valve. Wikipedia]
This hydraulic schematic example was redrawn using ConceptDraw PRO diagramming and vector drawing software from the Wikimedia Commons file: Retract resistor check valve application.png.
[commons.wikimedia.org/ wiki/ File:Retract_ resistor_ check_ valve_ application.png]
The hydraulic engineering drawing example "Retract resistor check valve application" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Mechanical Engineering solution from the Engineering area of ConceptDraw Solution Park.
Hydraulic schematic
Hydraulic schematic, restrictor valve, non-return, valve, double-acting, magnetic cylinder, dot, line, junction,
The vector stencils library "Terminals and connectors" contains 43 element symbols of terminals, connectors, plugs, polarized connectors, jacks, coaxial cables, and conductors.
Use it for drawing the wiring diagrams, electrical layouts, electronic schematics, and circuit diagrams.
"An electrical connector is an electro-mechanical device for joining electrical circuits as an interface using a mechanical assembly. Connectors consist of plugs (male-ended) and jacks (female-ended). The connection may be temporary, as for portable equipment, require a tool for assembly and removal, or serve as a permanent electrical joint between two wires or devices. An adapter can be used to effectively bring together dissimilar connectors.
There are hundreds of types of electrical connectors. Connectors may join two lengths of flexible copper wire or cable, or connect a wire or cable or optical interface to an electrical terminal.
In computing, an electrical connector can also be known as a physical interface... Cable glands, known as cable connectors in the US, connect wires to devices mechanically rather than electrically and are distinct from quick-disconnects performing the latter." [Electrical connector. Wikipedia]
"A terminal is the point at which a conductor from an electrical component, device or network comes to an end and provides a point of connection to external circuits. A terminal may simply be the end of a wire or it may be fitted with a connector or fastener. In network analysis, terminal means a point at which connections can be made to a network in theory and does not necessarily refer to any real physical object. In this context, especially in older documents, it is sometimes called a "pole".
The connection may be temporary, as seen in portable equipment, may require a tool for assembly and removal, or may be a permanent electrical joint between two wires or devices.
All electric cell have two terminals. The first is the positive terminal and the second is the negative terminal. The positive terminal looks like a metal cap and the negative terminal looks like a metal disc. The current flows from the positive terminal, and out through the negative terminal, replicative of current flow (positive (+) to negative (-) flow)." [Terminal (electronics). Wikipedia]
The shapes example "Design elements - Terminals and connectors" was drawn using the ConceptDraw PRO diagramming and vector drawing software extended with the Electrical Engineering solution from the Engineering area of ConceptDraw Solution Park.
Terminal and connector symbols
Terminal and connector symbols, terminal board, terminal strip, small, D connector, D-type connector, shielded, RCA, plug, shielded, RCA, jack, normalled, jack, circuit, male contact, large, D connector, D-type connector, female contact, coaxial, outside conductor, coaxial plug, coaxial jack, circuit terminal, center conductor coaxial, outside conductor, chassis, cable termination, single line, cable termination, complete, adapter, male-male, adapter, male-female, C header connector, 15 pin, type C, AC out, AC power out, 3-conductor, polarized connector, male, 3-conductor, polarized connector, female, 2-conductor, plug, 2-conductor, nonpolarized connector, male, 2-conductor, nonpolarized connector, female, 2-conductor, jack,
The vector stencils library "Bearings" contains 59 symbols of ball bearings, roller bearings, shafts, springs, gears, hooks, spindles, and keys.
Use it to design engineering drawings of machine tools and mechanical devices.
"A bearing is a machine element that constrains relative motion and reduce friction between moving parts to only the desired motion. The design of the bearing may, for example, provide for free linear movement of the moving part or for free rotation around a fixed axis; or, it may prevent a motion by controlling the vectors of normal forces that bear on the moving parts. Many bearings also facilitate the desired motion as much as possible, such as by minimizing friction. Bearings are classified broadly according to the type of operation, the motions allowed, or to the directions of the loads (forces) applied to the parts." [Bearing (mechanical). Wikipedia]
The shapes example "Design elements - Bearings" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Mechanical Engineering solution from the Engineering area of ConceptDraw Solution Park.
Bearing symbols
Bearing symbols, undercut, shaft, variable fillet radius, thrust ball bearing, through hole, threaded hole, tapered shaft, tapered key, gib head, taper roller bearing, roller bearing, spindle end, shaft, hollow shaft, shaft chamfer, chamfer, round key, round-end key, rolling bearing, needle roller bearing, roller bearing, hole chamfer, chamfer, gear, spur-gear, double row, spherical roller bearing, roller bearing, double row, self aligning, ball bearing, deep groove, ball bearing, cylindrical roller bearing, roller bearing, cutaway, revealing detail, countersunk hole, centering bore, hole, shaft, angular contact, ball bearing,
The vector stencils library "Transmission paths" contains 43 symbols of power transmission paths, electronic circuits, bus connectors and elbows, terminals, junctions, and concentrators.
Use it to annotate electrical diagrams, electronic schematics and circuit diagrams.
"A physical medium in data communications is the transmission path over which a signal propagates.
Many transmission media are used as communications channel.
For telecommunications purposes in the United States, Federal Standard 1037C, transmission media are classified as one of the following:
(1) Guided (or bounded) - waves are guided along a solid medium such as a transmission line.
(2) Wireless (or unguided) - transmission and reception are achieved by means of an antenna.
One of the most common physical medias used in networking is copper wire. Copper wire to carry signals to long distances using relatively low amounts of power. The unshielded twisted pair (UTP) is eight strands of copper wire, organized into four pairs.
Another example of a physical medium is optical fiber, which has emerged as the most commonly used transmission medium for long-distance communications. Optical fiber is a thin strand of glass that guides light along its length.
Multimode and single mode are two types of commonly used optical fiber. Multimode fiber uses LEDs as the light source and can carry signals over shorter distances, about 2 kilometers. Single mode can carry signals over distances of tens of miles.
Wireless media may carry surface waves or skywaves, either longitudinally or transversely, and are so classified.
In both communications, communication is in the form of electromagnetic waves. With guided transmission media, the waves are guided along a physical path; examples of guided media include phone lines, twisted pair cables, coaxial cables, and optical fibers. Unguided transmission media are methods that allow the transmission of data without the use of physical means to define the path it takes. Examples of this include microwave, radio or infrared. Unguided media provide a means for transmitting electromagnetic waves but do not guide them; examples are propagation through air, vacuum and seawater.
The term direct link is used to refer to the transmission path between two devices in which signals propagate directly from transmitters to receivers with no intermediate devices, other than amplifiers or repeaters used to increase signal strength. This term can apply to both guided and unguided media.
A transmission may be simplex, half-duplex, or full-duplex.
In simplex transmission, signals are transmitted in only one direction; one station is a transmitter and the other is the receiver. In the half-duplex operation, both stations may transmit, but only one at a time. In full duplex operation, both stations may transmit simultaneously. In the latter case, the medium is carrying signals in both directions at same time." [Transmission medium. Wikipedia]
The shapes example "Design elements - Transmission paths" was drawn using the ConceptDraw PRO diagramming and vector drawing software extended with the Electrical Engineering solution from the Engineering area of ConceptDraw Solution Park.
Transmission path symbols
Transmission path symbols, transmission path, terminal, 3-phase, terminal, straight, bus, point, overground, weatherproof, enclosure, optical fiber, line, cable, underground, line, cable, submarine, line, cable, overhead, line, cable, loaded, line, cable, coaxial, line concentrator, lead group, label, path, elbow, bus, direction, flow, transmission path, cable group, cable, conductor, bus, width, anticreep device, cable, 8-line, bus, straight bus connector, 8-line, bus, elbow, 4-line, bus, straight bus connector, 4-line, bus, elbow, 3-line, bus, elbow, 3-line bus, 3-channel, straight bus connector, 2-line, bus, elbow, 2-line bus, 2-channel, straight bus connector,
The vector stencils library "Switches and relays" contains 58 symbols of electrical contacts, switches, relays, circuit breakers, selectors, connectors, disconnect devices, switching circuits, current regulators, and thermostats for electrical devices.
"In electrical engineering, a switch is an electrical component that can break an electrical circuit, interrupting the current or diverting it from one conductor to another.
The most familiar form of switch is a manually operated electromechanical device with one or more sets of electrical contacts, which are connected to external circuits. Each set of contacts can be in one of two states: either "closed" meaning the contacts are touching and electricity can flow between them, or "open", meaning the contacts are separated and the switch is nonconducting. The mechanism actuating the transition between these two states (open or closed) can be either a "toggle" (flip switch for continuous "on" or "off") or "momentary" (push-for "on" or push-for "off") type.
A switch may be directly manipulated by a human as a control signal to a system, such as a computer keyboard button, or to control power flow in a circuit, such as a light switch. Automatically operated switches can be used to control the motions of machines, for example, to indicate that a garage door has reached its full open position or that a machine tool is in a position to accept another workpiece. Switches may be operated by process variables such as pressure, temperature, flow, current, voltage, and force, acting as sensors in a process and used to automatically control a system. ... A switch that is operated by another electrical circuit is called a relay. Large switches may be remotely operated by a motor drive mechanism. Some switches are used to isolate electric power from a system, providing a visible point of isolation that can be padlocked if necessary to prevent accidental operation of a machine during maintenance, or to prevent electric shock." [Switch. Wikipedia]
"A relay is an electrically operated switch. Many relays use an electromagnet to mechanically operate a switch, but other operating principles are also used, such as solid-state relays. Relays are used where it is necessary to control a circuit by a low-power signal (with complete electrical isolation between control and controlled circuits), or where several circuits must be controlled by one signal. The first relays were used in long distance telegraph circuits as amplifiers: they repeated the signal coming in from one circuit and re-transmitted it on another circuit. Relays were used extensively in telephone exchanges and early computers to perform logical operations.
A type of relay that can handle the high power required to directly control an electric motor or other loads is called a contactor. Solid-state relays control power circuits with no moving parts, instead using a semiconductor device to perform switching. Relays with calibrated operating characteristics and sometimes multiple operating coils are used to protect electrical circuits from overload or faults; in modern electric power systems these functions are performed by digital instruments still called "protective relays"." [Relay. Wikipedia]
The shapes example "Design elements - Switches and relays" was drawn using the ConceptDraw PRO diagramming and vector drawing software extended with the Electrical Engineering solution from the Engineering area of ConceptDraw Solution Park.
Switch and relay symbols
Switch and relay symbols, two way contact, time delay make, open switch, time-delay closing, TDC, time delay make, normally open, time delay break, normally closed, time delay break, closed switch, time-delay opening, TDO, thermostat, temperature switch, temperature sensitive switch, temperature actuated switch, switch disconnector, isolating-switch, stay put, contact without spring return, spring return, make, spring return, break, spring return, shorting selector, make-before-break, shorting, bridging,  contact transfer, selector switch, break-before-make, nonshorting, nonbridging, contact transfer, safety interlock, circuit opening, relay contacts, relay coil, relay, pushbutton, make, circuit closing, mushroom head, push-pull head, pushbutton, break, circuit opening, mushroom head, push-pull head, pushbutton, 2-circuit, circuit opening, break, proximity limit switch, directly actuated, spring returned, normally closed, pressure actuated switch, pilot light, passing make-contact, mercury switch, manual switch, manually operated switch, make contact, liquid level actuated switch, limit switch, directly actuated, spring returned, normally open, limit switch, directly actuated, spring returned, normally closed, limit switch, isolator, inertia switch, gas flow actuated switch, fuse, flow actuated, circuit breaker, change-over contact, break contact, SPST, single-pole, single-throw, switch, SPDT, single-pole, double-throw, switch, DPST, double-pole, single-throw, switch, DPDT, double-pole, double-throw, switch, 4 position, switch, 3 position, three-position, switch, 2 position, switch,
The vector stencils library "Dimensioning and tolerancing" contains 45 symbols of geometric dimensions and mechanical tolerances, geometric symbols, callouts, and text boxes and inserts.
Use these geometric dimensioning and tolerancing (GD&T) shapes to create annotated mechanical drawings.
"Geometric dimensioning and tolerancing (GD&T) is a system for defining and communicating engineering tolerances. It uses a symbolic language on engineering drawings and computer-generated three-dimensional solid models that explicitly describes nominal geometry and its allowable variation. It tells the manufacturing staff and machines what degree of accuracy and precision is needed on each controlled feature of the part. GD&T is used to define the nominal (theoretically perfect) geometry of parts and assemblies, to define the allowable variation in form and possible size of individual features, and to define the allowable variation between features." [Geometric dimensioning and tolerancing. Wikipedia]
The shapes example "Design elements - Dimensioning and tolerancing" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Mechanical Engineering solution from the ConceptDraw Solution Park.
Dimensioning and tolerancing symbols
Dimensioning and tolerancing symbols, total runout, text block, symmetry, surface, finish, roughness, surface profile, straightness, statistical tolerance, slope, position, positioning, perpendicularity, parallelism, material condition, line profile, flatness, diameter, depth, datum, reference, circle, datum, feature control, datum target, point, datum target, line, datum target, area, datum, cylindricity, countersink, counterbore, spotface, conical taper, concentricity, circularity, circular runout, callout, arc length, angularity,
The vector stencils library "Hydraulic pumps and motors" contains 74 symbols of hydraulic equipment.
Use these shapes for engineering drawings of fluid power and hydraulic control systems in the ConceptDraw PRO diagramming and vector drawing software extended with the Mechanical Engineering solution from the Engineering area of ConceptDraw Solution Park.
www.conceptdraw.com/ solution-park/ engineering-mechanical
Pump, hydraulic
Pump, hydraulic, hydraulic pump,
Motor, hydraulic
Motor, hydraulic, hydraulic motor,
Pump-motor, hydraulic
Pump-motor, hydraulic, hydraulic pump motor,
Pump, fixed, external drain
Pump, fixed, external drain, fixed displacement hydraulic pump,
Pump, fixed, external drain
Pump, fixed, external drain, fixed displacement hydraulic pump,
Pump, variable
Pump, variable, variable displacement pump,
Pump, variable, external drain
Pump, variable, external drain, variable displacement hydraulic pump,
Pump, var., manual override
Pump, var., manual override, variable displacement pump,
Pump, var., manual override, drain
Pump, var., manual override, drain, variable displacement hydraulic pump,
Pump, var., solenoid
Pump, var., solenoid, hydraulic pump,
Pump, var., solenoid, drain
Pump, var., solenoid, drain, hydraulic pump,
Pump, var., solenoid 2
Pump, var., solenoid 2, hydraulic pump,
Pump, var., solenoid 2, drain
Pump, var., solenoid 2, drain, hydraulic pump,
Pump, var., var. solenoid
Pump, var., var. solenoid, variable displacement hydraulic pump,
Pump, var., var. solenoid, drain
Pump, var., var. solenoid, drain, variable displacement hydraulic pump,
Pump, var., var. solenoid 2
Pump, var., var. solenoid 2, hydraulic pump,
Pump, var., var. solenoid 2, drain
Pump, var., var. solenoid 2, drain, hydraulic pump,
Pump, var., var., roller
Pump, var., var., roller, hydraulic pump,
Pump, var., roller, drain
Pump, var., roller, drain, hydraulic pump,
Motor, fixed, external drain
Motor, fixed, external drain, fixed displacement hydraulic motor,
Motor, fixed, external drain
Motor, fixed, external drain, fixed displacement hydraulic motor,
Motor, variable
Motor, variable, variable displacement hydraulic motor,
Motor, variable, external drain
Motor, variable, external drain, variable displacement hydraulic motor,
Motor, var., manual override
Motor, var., manual override, variable displacement hydraulic motor,
Motor, var., manual override, drain
Motor, var., manual override, drain, variable displacement hydraulic motor,
Motor, var., solenoid
Motor, var., solenoid, variable displacement hydraulic motor,
Motor, var., solenoid, drain
Motor, var., solenoid, drain, variable displacement hydraulic motor,
Motor, var., solenoid 2
Motor, var., solenoid 2, variable displacement hydraulic motor,
Motor, var., solenoid 2, drain
Motor, var., solenoid 2, drain, variable displacement hydraulic motor,
Motor, var., var. solenoid
Motor, var., var. solenoid, variable displacement hydraulic motor,
Motor, var., var. solenoid, drain
Motor, var., var. solenoid, drain, variable displacement hydraulic motor,
Motor, var., var. solenoid 2
Motor, var., var. solenoid 2, variable displacement hydraulic motor,
Motor, var., var. solenoid 2, drain
Motor, var., var. solenoid 2, drain, variable displacement hydraulic motor,
Motor, var., var., roller
Motor, var., var., roller, variable displacement hydraulic motor,
Motor, var., roller, drain
Motor, var., roller, drain, variable displacement hydraulic motor,
Pump-motor, fixed, external drain
Pump-motor, fixed, external drain, hydraulic pump motor,
Pump-motor, fixed, external drain
Pump-motor, fixed, external drain, hydraulic pump motor,
Pump-motor, variable
Pump-motor, variable, hydraulic pump motor,
Pump-motor, variable, external drain
Pump-motor, variable, external drain, hydraulic pump motor,
Pump-motor, var., manual override
Pump-motor, var., manual override, hydraulic pump motor,
Pump-motor, var., manual override, drain
Pump-motor, var., manual override, drain, hydraulic pump motor,
Pump-motor, var., solenoid
Pump-motor, var., solenoid, hydraulic pump motor,
Pump-motor, var., solenoid, drain
Pump-motor, var., solenoid, drain, hydraulic pump motor,
Pump-motor, var., solenoid 2
Pump-motor, var., solenoid 2, hydraulic pump motor,
Pump-motor, var., solenoid 2, drain
Pump-motor, var., solenoid 2, drain, hydraulic pump motor,
Pump-motor, var., var. solenoid
Pump-motor, var., var. solenoid, hydraulic pump motor,
Pump-motor, var., var. solenoid, drain
Pump-motor, var., var. solenoid, drain, hydraulic pump motor,
Pump-motor, var., var. solenoid 2
Pump-motor, var., var. solenoid 2, hydraulic pump motor,
Pump-motor, var., var. solenoid 2, drain
Pump-motor, var., var. solenoid 2, drain, hydraulic pump motor,
Pump-motor, var., var., roller
Pump-motor, var., var., roller, hydraulic pump motor,
Pump-motor, var., roller, drain
Pump-motor, var., roller, drain, hydraulic pump motor,
Pump, fixed 2
Pump, fixed 2, fixed displacement pump,
Pump, fixed 2, drain
Pump, fixed 2, drain, fixed displacement pump,
Pump, variable (sgl side)
Pump, variable (sgl side), hydraulic variable displacement pump,
Pump, variable (sgl side), drain
Pump, variable (sgl side), drain, hydraulic variable displacement pump,
Pump, variable (dbl side)
Pump, variable (dbl side), hydraulic variable displacement pump,
Pump, variable (dbl side), drain
Pump, variable (dbl side), drain, hydraulic variable displacement pump,
Motor, fixed 2
Motor, fixed 2, fixed displacement motor,
Motor, variable (sgl side)
Motor, variable (sgl side), hydraulic variable displacement motor,
Motor, variable (dbl side)
Motor, variable (dbl side), hydraulic variable displacement motor,
Motor, fixed 2, drain
Motor, fixed 2, drain, fixed displacement motor,
Motor, variable (sgl side), drain
Motor, variable (sgl side), drain, hydraulic variable displacement motor,
Motor, variable (dbl side), drain
Motor, variable (dbl side), drain, hydraulic variable displacement motor,
Pump-motor, fixed 2
Pump-motor, fixed 2, fixed displacement pump motor,
Pump-motor, fixed 2, drain
Pump-motor, fixed 2, drain, fixed displacement pump motor,
Pump-motor, variable (sgl side)
Pump-motor, variable (sgl side), hydraulic variable displacement pump motor,
Pump-motor, variable (sgl side), drain
Pump-motor, variable (sgl side), drain, hydraulic variable displacement pump motor,
Pump-motor, variable (dbl side)
Pump-motor, variable (dbl side), hydraulic variable displacement pump motor,
Pump-motor, variable (dbl side), drain
Pump-motor, variable (dbl side), drain, hydraulic variable displacement pump motor,
Pump, variable displacement
Pump, variable displacement, variable displacement pump,
Motor, variable displacement
Motor, variable displacement, variable displacement hydraulic motor,
Pump-motor, variable displacement
Pump-motor, variable displacement, hydraulic pump motor,
Floating motor
Floating motor, floating motor,
Pressure compensator
Pressure compensator, pressure compensator,
This example engineering drawing showing the hydraulic directional control valve usage with floating motor and pressure compensated pump is redesigned using the ConceptDraw PRO diagramming and vector drawing software from the Wikimedia Commons file: DCV 17.jpg.
[commons.wikimedia.org/ wiki/ File:DCV_ 17.jpg]
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"Directional control valves are one of the most fundamental parts in hydraulic machinery as well and pneumatic machinery. They allow fluid flow into different paths from one or more sources. They usually consist of a spool inside a cylinder which is mechanically or electrically controlled. The movement of the spool restricts or permits the flow, thus it controls the fluid flow. ...
The spool (sliding type) consists of lands and grooves.The lands block oil flow through the valve body. The grooves allow oil or gas to flow around the spool and through the valve body. There are two fundamental positions of directional control valve namely normal position where valve returns on removal of actuating force and other is working position which is position of a valve when actuating force is applied. There is another class of valves with 3 or more position that can be spring centered with 2 working position and a normal position. ...
Directional control valves can be classified according to:
(1) number of ports;
(2) number of positions;
(3) actuating methods;
(4) type of spool." [Directional control valve. Wikipedia]
The fluid power equipment drawing example "Directional control valve" is included in the Mechanical Engineering solution from the Engineering area of ConceptDraw Solution Park.
Hydraulic equipment schematic
Hydraulic equipment schematic, spring, variable spring, non-variable spring, reservoir, pressure compensator, hydraulic pump, four-port, flow path, four-port, crossed, flow path, flow path, floating motor, filter, electric linear, solenoid, dot, line, junction, closed path, closed port, callout, box, flow path,
The vector stencils library "Chemical engineering" contains 24 symbols of chemical and process engineering equipment.
Use these shapes for drawing block flow diagrams (BFD), process flow diagrams (PFD), piping and instrumentation diagrams (P&ID), and water flow diagrams.
"Chemical engineering is a branch of engineering that applies the natural (or experimental) sciences (e.g., chemistry and physics) and life sciences (e.g. biology, microbiology and biochemistry) together with mathematics and economics to production, transformation, transportation and proper usage of chemicals, materials and energy. It essentially deals with the engineering of chemicals, energy and the processes that create and/ or convert them. Modern chemical engineers are concerned with processes that convert raw-materials or (cheap)chemicals into more useful or valuable forms. In addition, they are also concerned with pioneering valuable materials and related techniques – which are often essential to related fields such as nanotechnology, fuel cells and bioengineering. Within chemical engineering, two broad subgroups include design, manufacture, and operation of plants and machinery in industrial chemical and related processes ("chemical process engineers") and development of new or adapted substances for products ranging from foods and beverages to cosmetics to cleaners to pharmaceutical ingredients, among many other products ("chemical product engineers")." [Chemical engineering. Wikipedia]
The example "Design elements - Chemical engineering" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Chemical and Process Engineering solution from the Engineering area of ConceptDraw Solution Park.
Chemical engineering symbols
Chemical engineering symbols, vessel, venturi, flow nozzle, vapor, vertical, jacketed vessel, vaporizing equipment, vapor, horizontal, jacketed vessel, vaporizing equipment, valve, in-line, tower, bubble tower, sparge, process vessel, tank truck, tank car, screen, separating equipment, roll press, roll-type press, size-enlargement equipment, pump mixer, agitated-line, mixing equipment, propeller, mixing blade, motor valve, valve, kettle, reboiler, heat exchanging equipment, instrument, instrumentation, flash drum, knockout drum, process vessel, fan, centrifugal fan, evaporator, circulating evaporator, electrostatic precipitator, bag filter, separating equipment, cooling tower, auxiliary facility, clarifier, thickener, separating equipment, centrifugal pump, blower, rotary blower, agitator, radial turbine agitated tank, mixing equipment,
The vector stencils library "Fluid power equipment" contains 113 symbols of hydraulic and pneumatic equipment including pumps, motors, air compressors, cylinders, meters, gauges, and actuators.
Use it to design fluid power and hydraulic control systems in the ConceptDraw PRO diagramming and vector drawing software extended with the Mechanical Engineering solution from the Engineering area of ConceptDraw Solution Park.
www.conceptdraw.com/ solution-park/ engineering-mechanical
Actuator (semi-rotary), pneumatic
Actuator (semi-rotary), pneumatic, semi-rotary, actuator, limited angle, rotation,
Actuator (semi-rotary), hydraulic
Actuator (semi-rotary), hydraulic, semi-rotary, actuator, limited angle, rotation,
Drive unit, pneumatic
Drive unit, pneumatic, pneumatic, drive unit, variable speed,
Drive unit, hydraulic
Drive unit, hydraulic, hydraulic, drive unit, variable speed,
Sgl-act. cylinder, pneum., left spring
Sgl-act. cylinder, pneum., left spring, single-acting, pneumatic, cylinder,
Sgl-act. cylinder, pneum., right spring
Sgl-act. cylinder, pneum., right spring, single-acting, pneumatic, cylinder,
Sgl-act. cylinder, pneumatic
Sgl-act. cylinder, pneumatic, single-acting, pneumatic, cylinder,
Sgl-act. cylinder, hydr., left spring
Sgl-act. cylinder, hydr., left spring, single-acting, hydraulic, cylinder,
Sgl-act. cylinder, hydr., right spring
Sgl-act. cylinder, hydr., right spring, single-acting, hydraulic, cylinder,
Sgl-act. cylinder, hydraulic
Sgl-act. cylinder, hydraulic, single-acting, hydraulic, cylinder,
Dbl-act. cylinder, pneumatic
Dbl-act. cylinder, pneumatic, double-acting, pneumatic, cylinder,
Dbl-act. cylinder, pneum., sgl cushion
Dbl-act. cylinder, pneum., sgl cushion, double-acting, pneumatic, cylinder,
Dbl-act. cylinder, pneum., dbl cushion
Dbl-act. cylinder, pneum., dbl cushion, double-acting, pneumatic, cylinder,
Dbl-act. cylinder, pneum., adjustable
Dbl-act. cylinder, pneum., adjustable, double-acting, pneumatic, cylinder, adjustable,
Dbl-act. cylinder, pneum., sgl cushion, adj.
Dbl-act. cylinder, pneum., sgl cushion, adj., double-acting, pneumatic, cylinder, adjustable,
Dbl-act. cylinder, pneum., dbl cushion, adj.
Dbl-act. cylinder, pneum., dbl cushion, adj., double-acting, pneumatic, cylinder, adjustable,
Dbl-act. cylinder, hydraulic
Dbl-act. cylinder, hydraulic, double-acting, hydraulic, cylinder,
Dbl-act. cylinder, hydr., sgl cushion
Dbl-act. cylinder, hydr., sgl cushion, double-acting, hydraulic, cylinder,
Dbl-act. cylinder, hydr., dbl cushion
Dbl-act. cylinder, hydr., dbl cushion, double-acting, hydraulic, cylinder,
Dbl-act. cylinder, hydr., adjustable
Dbl-act. cylinder, hydr., adjustable, double-acting, hydraulic, cylinder, adjustable,
Dbl-act. cylinder, hydr., sgl cushion, adj.
Dbl-act. cylinder, hydr., sgl cushion, adj., double-acting, hydraulic, cylinder, adjustable,
Dbl-act. cylinder, hydr., dbl cushion, adj.
Dbl-act. cylinder, hydr., dbl cushion, adj., double-acting, hydraulic, cylinder, adjustable,
Dbl-act. cylinder, magnetic
Dbl-act. cylinder, magnetic, double-acting, magnetic cylinder,
Dbl-act. cylinder, magn., sgl cushion
Dbl-act. cylinder, magn., sgl cushion, double-acting, magnetic cylinder,
Dbl-act. cylinder, magn., dbl cushion
Dbl-act. cylinder, magn., dbl cushion, double-acting, magnetic cylinder,
Dbl-act. cylinder, magn., adjustable
Dbl-act. cylinder, magn., adjustable, double-acting, magnetic cylinder, adjustable,
Dbl-act. cylinder, magn., sgl cushion, adj.
Dbl-act. cylinder, magn., sgl cushion, adj., double-acting, magnetic cylinder, adjustable,
Dbl-act. cylinder, magn., dbl cushion, adj.
Dbl-act. cylinder, magn., dbl cushion, adj., double-acting, magnetic cylinder, adjustable,
Dbl-act. dbl-end. cylinder, pneumatic
Dbl-act. dbl-end. cylinder, pneumatic, double-acting, double-ended, cylinder,
Dbl-act. dbl-end. cylinder, pneum., sgl cushion
Dbl-act. dbl-end. cylinder, pneum., sgl cushion, double-acting, double-ended, cylinder,
Dbl-act. dbl-end. cylinder, pneum., dbl cushion
Dbl-act. dbl-end. cylinder, pneum., dbl cushion, double-acting, double-ended, cylinder,
Dbl-act. dbl-end. cylinder, pneum., adjustable
Dbl-act. dbl-end. cylinder, pneum., adjustable, double-acting, double-ended, cylinder,
Dbl-act. dbl-end. cylinder, pneum., sgl cushion, adj.
Dbl-act. dbl-end. cylinder, pneum., sgl cushion, adj., double-acting, double-ended, cylinder,
Dbl-act. dbl-end. cylinder, pneum., dbl cushion, adj.
Dbl-act. dbl-end. cylinder, pneum., dbl cushion, adj., double-acting, double-ended, cylinder,
Dbl-act. dbl-end. cylinder, hydraulic
Dbl-act. dbl-end. cylinder, hydraulic, double-acting, double-ended, cylinder,
Dbl-act. dbl-end. cylinder, hydr., sgl cushion
Dbl-act. dbl-end. cylinder,  hydr., sgl cushion, double-acting, double-ended, cylinder,
Dbl-act. dbl-end. cylinder, hydr., dbl cushion
Dbl-act. dbl-end. cylinder,  hydr., dbl cushion, double-acting, double-ended, cylinder,
Dbl-act. dbl-end. cylinder, hydr., adjustable
Dbl-act. dbl-end. cylinder,  hydr., adjustable, double-acting, double-ended, cylinder,
Dbl-act. dbl-end. cylinder, hydr., sgl cushion, adj.
Dbl-act. dbl-end. cylinder,  hydr., sgl cushion, adj., double-acting, double-ended, cylinder,
Dbl-act. dbl-end. cylinder, hydr., dbl cushion, adj.
Dbl-act. dbl-end. cylinder,  hydr., dbl cushion, adj., double-acting, double-ended, cylinder,
Telescopic cylinder, pneum., dbl-act.
Telescopic cylinder, pneum., dbl-act., telescopic, pneumatic, cylinder, double-acting,
Telescopic cylinder, hydr., dbl-act.
Telescopic cylinder, hydr., dbl-act., telescopic, hydraulic, cylinder, double-acting,
Telescopic cylinder, pneum., sgl-act.
Telescopic cylinder, pneum., sgl-act., telescopic, pneumatic, cylinder, single-acting,
Telescopic cylinder, hydr., sgl-act.
Telescopic cylinder, hydr., sgl-act., telescopic, hydraulic, cylinder, single-acting,
Actuator, hydraulic-pneumatic
Actuator, hydraulic-pneumatic, single-acting actuator, converting, pneumatic pressure, hydraulic pressure,
Actuator, pneumatic-hydraulic
Actuator, pneumatic-hydraulic, single-acting actuator, converting, pneumatic pressure, hydraulic pressure,
Intensifier, pneumatic
Intensifier, pneumatic, single-acting, intensifier, converting, pneumatic pressure,
Intensifier, hydraulic
Intensifier, hydraulic, single-acting, intensifier, converting, hydraulic pressure,
Intensifier, hydraulic-pneumatic
Intensifier, hydraulic-pneumatic, single-acting, intensifier, converting, pneumatic pressure, hydraulic pressure,
Intensifier, pneumatic-hydraulic
Intensifier, pneumatic-hydraulic, single-acting, intensifier, converting, pneumatic pressure, hydraulic pressure,
Intensifier, pneumatic-hydraulic
Intensifier, pneumatic-hydraulic, continuous, intensifier, converting, pneumatic pressure, hydraulic pressure,
Intensifier, hydraulic-pneumatic
Intensifier, hydraulic-pneumatic, continuous, intensifier, converting, pneumatic pressure, hydraulic pressure,
Actuator, pneumatic-hydraulic
Actuator, pneumatic-hydraulic, continuous, actuator, converting, pneumatic pressure, hydraulic pressure,
Actuator, hydraulic-pneumatic
Actuator, hydraulic-pneumatic, continuous, actuator, converting, pneumatic pressure, hydraulic pressure,
Accumulator
Accumulator, energy storage device, accumulator,
Accumulator, gas loaded
Accumulator, gas loaded, energy storage device, accumulator, gas loaded accumulator,
Accumulator, spring loaded
Accumulator, spring loaded, energy storage device, accumulator, spring loaded accumulator,
Accumulator, auxiliary gas bottle
Accumulator, auxiliary gas bottle, energy storage device, accumulator, auxiliary gas bottle,
Air receiver
Air receiver, air receiver,
Energy source, pneumatic
Energy source, pneumatic, pneumatic, energy source,
Energy source, hydraulic
Energy source, hydraulic, hydraulic, energy source,
Energy source, electric motor
Energy source, electric motor, energy source, electric motor,
Energy source, non-electric prime mover
Energy source, non-electric prime mover, energy source, non-electric prime mover,
Vented reservoir
Vented reservoir, vented reservoir,
Sealed reservoir
Sealed reservoir, pressurized, sealed, hydraulic, reservoir,
Filter
Filter, filter,
Filter, magnetic element
Filter, magnetic element, filter, magnetic element,
Filter, contamination indicator
Filter, contamination indicator, filter, contamination indicator,
Automatic drain filter separator
Automatic drain filter separator, automatically, drained, separator, valve, filter,
Manual drain filter separator
Manual drain filter separator, manually, drained, separator, valve, filter,
Separator, automatic drain
Separator, automatic drain, automatically, drained, separator, valve,
Separator, manual drain
Separator, manual drain, manually, drained, separator, valve,
Air dryer
Air dryer, air dryer, air drying,
Lubricator
Lubricator, lubricator, oil, air, lubricate,
Air service unit, filter, separator
Air service unit, filter, separator, air service unit, filter, separator,
Air service unit, separator
Air service unit, separator, air service unit, separator,
Air service unit, filter
Air service unit, filter, air service unit, filter,
Air service unit
Air service unit, air service unit,
Liquid cooler
Liquid cooler, heat exchanger, apparatus, cooling, circulating fluid,
Gas cooler
Gas cooler, heat exchanger, apparatus, cooling, circulating fluid,
Cooler
Cooler, heat exchanger, apparatus, cooling, circulating fluid,
Liquid heater
Liquid heater, heat exchanger, apparatus, heating, circulating fluid,
Gas heater
Gas heater, heat exchanger, apparatus, heating, circulating fluid,
Heater
Heater, heat exchanger, apparatus, heating, circulating fluid,
Liquid temperature controller
Liquid temperature controller, liquid temperature controller,
Gas temperature controller
Gas temperature controller, gas temperature controller,
Temperature controller
Temperature controller, temperature controller,
Liquid temperature controller 2
Liquid temperature controller 2, temperature controller, liquid,
Gas temperature controller 2
Gas temperature controller 2, temperature controller, gas,
Temperature controller 2
Temperature controller 2, temperature controller,
Pressure indicator
Pressure indicator, pressure indicator, pressure, indicator,
Pressure gauge
Pressure gauge, pressure gauge, pressure, gauge,
Differential pressure gauge
Differential pressure gauge, differential pressure gauge, pressure, gauge, differential gauge,
Thermometer
Thermometer, thermometer,
Liquid level measuring instrument
Liquid level measuring instrument, liquid level, measuring instrument,
Flow indicator
Flow indicator, flow, measurement, indicator,
Flow meter
Flow meter, flow meter,
Integrating flow meter
Integrating flow meter, flow meter, integrating,
Tachometer
Tachometer, tachometer,
Torque measurement equipment
Torque measurement equipment, torque measurement,
Pressure switch
Pressure switch, switch, pressure switch,
Limit switch
Limit switch, switch, limit switch,
Transducer
Transducer, transducer, analog transducer,
Pulse counter
Pulse counter, pulse counter, electric output signal,
Pulse counter 2
Pulse counter 2, pulse counter, pneumatic output signal,
Silencer
Silencer, silencer, pneumatic silencer,
Drain (inlet below fluid, drain line)
Drain (inlet below fluid, drain line), reservoir,
Drain (inlet below fluid, return line)
Drain (inlet below fluid, return line), reservoir,
Drain (inlet above fluid, drain line)
Drain (inlet above fluid, drain line), reservoir,
Drain (inlet above fluid, return line)
Drain (inlet above fluid, return line), reservoir,
Oil tank
Oil tank, oil tank,
Oil tank, empty
Oil tank, empty, oil tank,
Air compressor
Air compressor, air compressor,
The vector stencils library "Welding" contains 38 welding joint symbols to identify fillets, contours, resistance seams, grooves, surfacing, and backing.
Use it to indicate welding operations on working drawings.
"Welding is a fabrication or sculptural process that joins materials, usually metals or thermoplastics, by causing coalescence. This is often done by melting the workpieces and adding a filler material to form a pool of molten material (the weld pool) that cools to become a strong joint, with pressure sometimes used in conjunction with heat, or by itself, to produce the weld. This is in contrast with soldering and brazing, which involve melting a lower-melting-point material between the workpieces to form a bond between them, without melting the workpieces.
Many different energy sources can be used for welding, including a gas flame, an electric arc, a laser, an electron beam, friction, and ultrasound.
Welds can be geometrically prepared in many different ways. The five basic types of weld joints are the butt joint, lap joint, corner joint, edge joint, and T-joint (a variant of this last is the cruciform joint). Other variations exist as well - for example, double-V preparation joints are characterized by the two pieces of material each tapering to a single center point at one-half their height. Single-U and double-U preparation joints are also fairly common - instead of having straight edges like the single-V and double-V preparation joints, they are curved, forming the shape of a U. Lap joints are also commonly more than two pieces thick - depending on the process used and the thickness of the material, many pieces can be welded together in a lap joint geometry." [Welding. Wikipedia]
The shapes example "Design elements - Welding" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Mechanical Engineering solution from the Engineering area of ConceptDraw Solution Park.
Welding joint symbols
Welding joint symbols, surfacing, stud, square groove, spot, projection, weld, slot, plug, weld, scarf, bronzed joint, resistance seam weld, melt through weld, insert, consumable insert, flare bevel groove, flared-bevel groove, flare V groove, flared-V groove, flange edge, weld, flanged edge groove, flange corner, flanged corner groove, fillet, weld, field weld, contour, flush, weld, contour, convex, weld, contour, concave, weld, contour, angled, flush, weld, contour, angled, convex, weld, contour, angled, concave, weld, bevel groove, backing, spacer, back, backing, arrow, bend, arrow, V-groove, U-groove, J-groove,
The vector stencils library "Valves and fittings" contains 104 symbols of valve components.
Use these icons for drawing industrial piping systems; process, vacuum, and fluids piping; hydraulics piping; air and gas piping; materials distribution; and liquid transfer systems.
"A valve is a device that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. Valves are technically valves fittings, but are usually discussed as a separate category. In an open valve, fluid flows in a direction from higher pressure to lower pressure.
The simplest, and very ancient, valve is simply a freely hinged flap which drops to obstruct fluid (gas or liquid) flow in one direction, but is pushed open by flow in the opposite direction. This is called a check valve, as it prevents or "checks" the flow in one direction. ...
Valves are found in virtually every industrial process, including water & sewage processing, mining, power generation, processing of oil, gas & petroleum, food manufacturing, chemical & plastic manufacturing and many other fields. ...
Valves may be operated manually, either by a handle, lever, pedal or wheel. Valves may also be automatic, driven by changes in pressure, temperature, or flow. These changes may act upon a diaphragm or a piston which in turn activates the valve, examples of this type of valve found commonly are safety valves fitted to hot water systems or boilers.
More complex control systems using valves requiring automatic control based on an external input (i.e., regulating flow through a pipe to a changing set point) require an actuator. An actuator will stroke the valve depending on its input and set-up, allowing the valve to be positioned accurately, and allowing control over a variety of requirements." [Valve. Wikipedia]
The example "Design elements - Valves and fittings" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Chemical and Process Engineering solution from the Engineering area of ConceptDraw Solution Park.
Valves and fittings symbols
Valves and fittings symbols, wedge gate valve, valve manifold, tundish, swivel joint, strainer, stop check valve, soldered, solvent, socket, spigot, socket,  spigot, socket weld, sleeve joint, separator, screwed sleeve, screwed joint, screw-down valve, screw-down check valve, relief valve, relief angle valve vacuum, relief angle valve pressure, reel valve, reducing valve, reducer, powered valve, plug valve straight through, plug valve T point, plug valve L point, plug valve 3 way, plug valve, parallel slide valve, open vent, needle valve, lock-shield valve, liquid seal, joint, hydrant, globe valve, gate valve, float operated valve, flanged valve, flanged joint, bolted joint, flame arrester, exhaust silencer, exhaust head, end cap socket and spigot, end cap screwed, end cap quick release, end cap flanged and bolted, end cap fillet welded, end cap butt welded, end cap	screwed and plugged, end cap, electrically insulated, electrically bonded, drain silencer, diaphragm valve, check valve, characterized port valve, butterfly valve, butt weld, bursting disc, bell mouth, ball valve, angle valve, Y strainer, 3-way plug valve,