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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. ...
While working with layouts of hydraulic machinery it is cumbersome to draw actual picture of every valve and other components.instead of pictures symbols are used for variety of components in the hydraulic system to highlight the functional aspects. symbol for directional control valve is made of number of square boxes adjacent to each other depending on the number of positions.connections to the valve are shown on these squares by capital letters.usually they are named only in their normal position and not repeated in other positions.actuation system of the valve is also designated in its symbol." [Directional control valve. Wikipedia]
The Mac template "Pneumatic 5-ported 3-position valve" for the ConceptDraw PRO diagramming and vector drawing software is included in the Mechanical Engineering solution from the Engineering area of ConceptDraw Solution Park.
www.conceptdraw.com/ solution-park/ engineering-mechanical
Pneumatic directional control valve
Pneumatic directional control valve, five-port, three-position, valve,
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,
The vector stencils library "Fluid power valves" contains 93 symbols of pre-made hydraulic and pneumatic valves, including directional control valves, flow control valves, pressure control valves, and electrohydraulic and electropneumatic valves.
"Control valves are valves used to control conditions such as flow, pressure, temperature, and liquid level by fully or partially opening or closing in response to signals received from controllers that compare a "setpoint" to a "process variable" whose value is provided by sensors that monitor changes in such conditions.
The opening or closing of control valves is usually done automatically by electrical, hydraulic or pneumatic actuators. Positioners are used to control the opening or closing of the actuator based on electric, or pneumatic signals.
A control valve consists of three main parts in which each part exist in several types and designs: Valve's actuator, Valve's positioner, Valve's body.
" [Control valves. Wikipedia]
The shapes example "Design elements - Fluid power valves" 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.
Fluid power valve symbols
Fluid power valve symbols, two-stage, pressure relief, valve, provision, remote control, two-port, two-position, valve, three-port, two-position, valve, restrictor valve, pressure relief, sequence valve, pressure reducing, regulator, valve, one-way restrictor, valve, free flow, one direction, variable restriction, flow, non-return, valve, gate-valve, four-port, two-position, valve, four-port, three-position, valve, flow divider, valve, flow control, valvel, series flow, flow control, valve, temperature compensated, flow control, valve, bypass flow control, five-port, two-position, valve, five-port, three-position, valve, electrically operated, pressure relief, valve, coupling, disconnected, self-sealing, quick release, mechanically operated valves, coupling, disconnected, self-sealing, quick release, coupling, connected, self-sealing, quick release, mechanically operated valves, coupling, connected, self-sealing, quick release, cartridge valve,
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,
"An air-operated valve is a type of power operated valve that uses air pressure against a piston or diaphragm to produce linear or circular movement to operate a valve. Types are 2-way, 3-way and 4-way. The 2 way air-operated valves can be either normally closed or normally opened." [Air-operated valve. Wikipedia]
The Windows template "Pneumatic 4-ported 3-position valve" for the ConceptDraw PRO diagramming and vector drawing software is included in the Mechanical Engineering solution from the Engineering area of ConceptDraw Solution Park.
www.conceptdraw.com/ solution-park/ engineering-mechanical
Pneumatic directional control valve
Pneumatic directional control valve, four-port, three-position, valve,
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 in the ConceptDraw PRO software extended with the Chemical and Process Engineering solution from the Chemical and Process Engineering area of ConceptDraw Solution Park.
www.conceptdraw.com/ solution-park/ engineering-chemical-process
Electrically bonded
Electrically bonded, electrically bonded,
Bursting disc
Bursting disc, bursting disc,
Flame arrester
Flame arrester, flame arrester,
Strainer
Strainer, strainer,
Separator
Separator, separator,
Exhaust silencer
Exhaust silencer, exhaust silencer,
Bell mouth
Bell mouth, bell mouth,
Exhaust head
Exhaust head, exhaust head,
Hydrant
Hydrant, hydrant,
Drain silencer
Drain silencer, drain silencer,
Liquid seal open/closed
Liquid seal open/closed, liquid seal,
Y strainer
Y strainer, Y strainer,
Gate valve
Gate valve, gate valve,
Globe valve
Globe valve, globe valve,
Globe valve 2
Globe valve 2, gate valve,
Globe valve 3
Globe valve 3, gate valve,
Screw-down valve
Screw-down valve, screw-down valve,
Lock-shield valve
Lock-shield valve, lock-shield valve,
Reel valve
Reel valve, reel valve,
Check valve
Check valve, check valve,
Check valve 2
Check valve 2, check valve,
Check valve 3
Check valve 3, check valve,
Screw-down check valve
Screw-down check valve, screw-down check valve,
Stop check valve
Stop check valve, stop check valve,
Diaphragm valve
Diaphragm valve, diaphragm valve,
Diaphragm valve 2
Diaphragm valve 2, diaphragm valve,
Diaphragm valve 3
Diaphragm valve 3, diaphragm valve,
Powered valve
Powered valve, powered valve,
Powered valve 2
Powered valve 2, powered valve,
Powered valve 3
Powered valve 3, powered valve,
Needle valve
Needle valve, needle valve,
Needle valve 2
Needle valve 2, needle valve,
Needle valve 3
Needle valve 3, needle valve,
Relief valve
Relief valve, relief valve,
Relief valve 2
Relief valve 2, relief valve,
Relief valve 3
Relief valve 3, relief valve,
Angle valve
Angle valve, angle valve,
Angle valve 2
Angle valve 2, angle valve,
Angle valve 3
Angle valve 3, angle valve,
Angle valve 4
Angle valve 4, angle valve,
Float operated valve
Float operated valve, float operated valve,
Float operated valve 2
Float operated valve 2, float operated valve,
Flanged valve
Flanged valve, flanged valve,
Butterfly valve
Butterfly valve, butterfly valve,
Butterfly valve 2
Butterfly valve 2, butterfly valve,
Wedge gate valve
Wedge gate valve, wedge gate valve,
Parallel slide valve
Parallel slide valve, parallel slide valve,
Ball valve
Ball valve,
Ball valve 2
Ball valve 2, ball valve,
Ball valve 3
Ball valve 3, ball valve,
Relief angle valve vacuum
Relief angle valve vacuum, relief angle valve vacuum,
Relief angle valve pressure
Relief angle valve pressure, relief angle valve pressure,
Reducing valve
Reducing valve, reducing valve,
Reducing valve 2
Reducing valve 2, reducing valve,
Plug valve 3 way
Plug valve 3 way, plug valve 3 way,
Plug valve L point
Plug valve L point, plug valve L point,
Plug valve 2
Plug valve 2, plug valve,
Plug valve
Plug valve, plug valve,
Plug valve straight through
Plug valve straight through, plug valve straight through,
Plug valve T point
Plug valve T point, plug valve T point,
3-way plug valve
3-way plug valve, 3-way plug valve,
3-way plug valve 2
3-way plug valve 2, 3-way plug valve,
3-way plug valve 3
3-way plug valve 3, 3-way plug valve,
Mixing valve
Mixing valve,
Valve Manifold
Valve Manifold, valve manifold,
Characterized port valve
Characterized port valve, characterized port valve,
Reducer
Reducer, reducer,
Reducer 2
Reducer 2, reducer,
General joint
General joint, joint,
Butt weld
Butt weld, butt weld,
Butt weld 2
Butt weld 2, butt weld,
Butt weld 3
Butt weld 3,
Butt weld 4
Butt weld 4, butt weld,
Flanged/ bolted
Flanged/ bolted, flanged joint, bolted joint,
Soldered / solvent
Soldered / solvent,
Soldered / solvent 2
Soldered / solvent 2, soldered, solvent,
Screwed joint
Screwed joint, screwed joint,
Screwed joint 2
Screwed joint 2, screwed joint,
Screwed joint 3
Screwed joint 3, screwed joint,
Socket and spigot
Socket and spigot, socket,  spigot,
Socket and spigot 2
Socket and spigot 2, socket, spigot,
Socket and spigot 3
Socket and spigot 3, socket, spigot,
Sleeve
Sleeve, sleeve joint,
Sleeve 2
Sleeve 2,
Screwed sleeve
Screwed sleeve, screwed sleeve,
Screwed sleeve 2
Screwed sleeve 2,
Socket weld
Socket weld,
Socket weld 2
Socket weld 2, socket weld,
Swivel joint
Swivel joint, swivel joint,
Swivel joint 2
Swivel joint 2, swivel joint,
Swivel joint 3
Swivel joint 3, swivel joint,
End cap
End cap, end cap,
End cap butt welded
End cap butt welded, end cap butt welded,
End cap screwed
End cap screwed, end cap screwed,
End cap socket and spigot
End cap socket and spigot, end cap socket and spigot,
End cap fillet welded
End cap fillet welded, end cap fillet welded,
End cap screwed and plugged
End cap screwed and plugged, end cap	screwed and plugged,
End cap quick release
End cap quick release, end cap quick release,
End cap flanged and bolted
End cap flanged and bolted, end cap flanged and bolted,
End cap flanged and bolted 2
End cap flanged and bolted 2, end cap flanged and bolted,
Electrically insulated
Electrically insulated, electrically insulated,
Tundish
Tundish, tundish,
Syphon drain
Syphon drain,
Open vent
Open vent, open vent,

chemical engineering, process engineering, process flow diagram symbols, process and instrumentation diagram, process diagrams Chemical and Process Engineering

chemical engineering, process engineering, process flow diagram symbols, process and instrumentation diagram, process diagrams
This chemical engineering solution extends ConceptDraw PRO v.9.5 (or later) with process flow diagram symbols, samples, process diagrams templates and libraries of design elements for creating process and instrumentation diagrams, block flow diagrams (BFD
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.
"Fluid power is the use of fluids under pressure to generate, control, and transmit power. Fluid power is subdivided into hydraulics using a liquid such as mineral oil or water, and pneumatics using a gas such as air or other gases. Compressed-air and water-pressure systems were once used to transmit power from a central source to industrial users over extended geographic areas; fluid power systems today are usually within a single building or mobile machine." [Fluid power. Wikipedia]
The shapes example "Design elements - Fluid power equipment" 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.
Fluid power symbols
Fluid power symbols, vented reservoir, torque measurement, thermometer, temperature controller, liquid, temperature controller, gas, temperature controller, telescopic, pneumatic, cylinder, single-acting, telescopic, pneumatic, cylinder, double-acting, telescopic, hydraulic, cylinder, single-acting, telescopic, hydraulic, cylinder, double-acting, tachometer, switch, pressure switch, switch, limit switch, single-acting, pneumatic, cylinder, single-acting, intensifier, converting, pneumatic pressure, hydraulic pressure, single-acting, intensifier, converting, pneumatic pressure, single-acting, intensifier, converting, hydraulic pressure, single-acting, hydraulic, cylinder, single-acting actuator, converting, pneumatic pressure, hydraulic pressure, silencer, pneumatic silencer, semi-rotary, actuator, limited angle, rotation, reservoir, pulse counter, pneumatic output signal, pulse counter, electric output signal, pressurized, sealed, hydraulic, reservoir, pressure indicator, pressure, indicator, pressure gauge, pressure, gauge, pneumatic, energy source, pneumatic, drive unit, variable speed, oil tank, manually, drained, separator, valve, filter, manually, drained, separator, valve, lubricator, oil, air, lubricate, liquid temperature controller, liquid level, measuring instrument, hydraulic, energy source, hydraulic, drive unit, variable speed, heat exchanger, apparatus, heating, circulating fluid, heat exchanger, apparatus, cooling, circulating fluid, gas temperature controller, flow, measurement, indicator, flow meter, integrating, flow meter, filter, magnetic element, filter, contamination indicator, filter, energy storage device, accumulator, spring loaded accumulator, energy storage device, accumulator, gas loaded accumulator, energy storage device, accumulator, auxiliary gas bottle, energy storage device, accumulator, energy source, non-electric prime mover, energy source, electric motor, double-acting, pneumatic, cylinder, adjustable, double-acting, pneumatic, cylinder, double-acting, magnetic cylinder, adjustable, double-acting, magnetic cylinder, double-acting, hydraulic, cylinder, adjustable, double-acting, hydraulic, cylinder, double-acting, double-ended, cylinder, differential pressure gauge, pressure, gauge, differential gauge, continuous, intensifier, converting, pneumatic pressure, hydraulic pressure, continuous, actuator, converting, pneumatic pressure, hydraulic pressure, automatically, drained, separator, valve, filter, automatically, drained, separator, valve, air service unit, separator, air service unit, filter, separator, air service unit, filter, air service unit, air receiver, air dryer, air drying, air compressor,