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"Directional control valves route the fluid to the desired actuator. They usually consist of a spool inside a cast iron or steel housing. The spool slides to different positions in the housing, and intersecting grooves and channels route the fluid based on the spool's position. The spool has a central (neutral) position maintained with springs; in this position the supply fluid is blocked, or returned to tank. Sliding the spool to one side routes the hydraulic fluid to an actuator and provides a return path from the actuator to tank. When the spool is moved to the opposite direction the supply and return paths are switched. When the spool is allowed to return to neutral (center) position the actuator fluid paths are blocked, locking it in position. Directional control valves are usually designed to be stackable, with one valve for each hydraulic cylinder, and one fluid input supplying all the valves in the stack. Tolerances are very tight in order to handle the high pressure and avoid leaking, spools typically have a clearance with the housing of less than a thousandth of an inch (25 µm). The valve block will be mounted to the machine's frame with a three point pattern to avoid distorting the valve block and jamming the valve's sensitive components. The spool position may be actuated by mechanical levers, hydraulic pilot pressure, or solenoids which push the spool left or right. A seal allows part of the spool to protrude outside the housing, where it is accessible to the actuator. The main valve block is usually a stack of off the shelf directional control valves chosen by flow capacity and performance. Some valves are designed to be proportional (flow rate proportional to valve position), while others may be simply on-off. The control valve is one of the most expensive and sensitive parts of a hydraulic circuit." [Hydraulic machinery. Wikipedia]
The Windows template "Hydraulic 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
Hydraulic directional control valve
Hydraulic directional control valve, four-port, three-position, valve,

mechanical engineering, mechanical design software, mechanical drawing symbols, mechanical drawing software Mechanical Engineering

mechanical engineering, mechanical design software, mechanical drawing symbols, mechanical drawing software
This solution extends ConceptDraw PRO v.9 mechanical drawing software (or later) with samples of mechanical drawing symbols, templates and libraries of design elements, for help when drafting mechanical engineering drawings, or parts, assembly, pneumatic,
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,
A simple hydraulic schematic showing apparatus for testing the strength of a hydraulic hose splice.
Water enters through normally closed solenoid valve (1) and passes through intake flow meter (2) to high pressure pump (4). Intake water pressure is monitored by pressure gauge (3). The hose to be tested connects between pump (4) and normally open solenoid activated drain valve (7). To test the hose, pump drive motor (5) is turned on, the solenoid of drain valve (7) is activated, closing the valve, and the pump is run to pressurize the hose. Test pressure is monitored by gauge (6). When the test is complete or the hose fails, the solenoid of drain valve (7) is deactivated, opening valve and discharging water, depressurizing the system. All components are operated electrically by a remote control circuit so that the operator may perform the test from a protected location, monitoring it with a camera and video monitor.
This hydraulic schematic example was redrawn using ConceptDraw PRO diagramming and vector drawing software from the Wikimedia Commons file: Hydraulic schematic.jpg.
[commons.wikimedia.org/ wiki/ File:Hydraulic_ schematic.jpg]
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
[creativecommons.org/ licenses/ by-sa/ 3.0/ deed.en]
The hydraulic schematic example "Apparatus for testing the strength of a hydraulic hose splice" is included in the Mechanical Engineering solution from the Engineering area of ConceptDraw Solution Park.
Hydraulic system schematic
Hydraulic system schematic, two-port, two-position, valve, spring, variable spring, non-variable spring, pressure gauge, pressure, gauge, hydraulic pump, flow meter, energy source, electric motor, electric linear, solenoid, callout,
The vector stencils library "Valves" contains 91 symbols of valves. Use it for drawing plumbing and piping plans, schematic diagrams and blueprints of industrial piping systems; process, vacuum, and fluids piping; hydraulics piping; air and gas piping; materials distribution; and liquid transfer systems in the ConceptDraw PRO diagramming and vector drawing software extended with the Plumbing and Piping Plans solution from the Building Plans area of ConceptDraw Solution Park.
In-line valve
In-line valve, in-line valve, valve,
3-way valve
3-way valve, in-line valve, valve,
4-way valve
4-way valve, in-line valve, valve,
Screw-down valve
Screw-down valve, screw-down valve, lock-shield valve, reel valve, valve, stop cock,
Lock-shield valve
Lock-shield valve, screw-down valve, lock-shield valve, reel valve, valve,
Reel valve
Reel valve, screw-down valve, lock-shield valve, reel valve, valve,
Relief valve
Relief valve, relief valve, valve,
Relief valve 2
Relief valve 2, relief valve, valve,
Relief valve 3
Relief valve 3, relief valve, valve,
Relief valve 4
Relief valve 4, relief valve, valve,
Angle valve
Angle valve, angle valve, valve,
Angle valve 2
Angle valve 2, angle valve, valve,
Angle valve 3
Angle valve 3, angle valve, valve,
Angle valve 4
Angle valve 4, angle valve, valve,
Check valve
Check valve, check valve, valve,
Check valve 2
Check valve 2, check valve, valve,
Screwdown valve
Screwdown valve, check valve, valve,
Float operated valve
Float operated valve, float operated valve, valve,
Float operated valve 2
Float operated valve 2, float operated valve, valve,
Flanged valve
Flanged valve, flanged valve, valve,
Flanged valve 2
Flanged valve 2, flanged valve, valve,
Butterfly valve
Butterfly valve, butterfly valve, valve,
Butterfly valve 2
Butterfly valve 2, butterfly valve, valve,
Globe valve
Globe valve, globe valve, valve,
Globe valve 2
Globe valve 2, globe valve, valve,
Globe valve 3
Globe valve 3, globe valve, valve,
Needle valve
Needle valve, needle valve, valve,
Needle valve 2
Needle valve 2, needle valve, valve,
Needle valve 3
Needle valve 3, needle valve, valve,
Needle valve 4
Needle valve 4, needle valve, valve,
Diaphragm valve
Diaphragm valve, diaphragm valve, valve,
Diaphragm valve 2
Diaphragm valve 2, diaphragm valve, valve,
Diaphragm valve 3
Diaphragm valve 3, diaphragm valve, valve,
Wedge gate valve
Wedge gate valve, wedge gate valve, wedge valve, valve,
Parallel side valve
Parallel side valve, parallel slide valve, parallel valve, valve,
Gate valve
Gate valve, gate valve, valve,
Ball valve
Ball valve, ball valve, valve,
Ball valve 2
Ball valve 2, ball valve, valve,
Ball valve 3
Ball valve 3, ball valve, valve,
Powered control valve
Powered control valve, powered valve, valve,
Powered control valve 2
Powered control valve 2, powered valve, valve,
Powered control valve 3
Powered control valve 3, powered valve, valve,
Relief angle valve, pressure
Relief angle valve, pressure, relief angle valve, relief valve, angle valve, valve, pressure, vacuum,
Relief angle valve, vacuum
Relief angle valve, vacuum, relief angle valve, relief valve, angle valve, valve, pressure, vacuum,
Reducing valve
Reducing valve, reducing valve, valve,
Reducing valve 2
Reducing valve 2, reducing valve, valve,
Plug valve
Plug valve, plug valve, valve,
Plug valve 2
Plug valve 2,
Plug valve, straight through
Plug valve, straight through,
3-way plug valve
3-way plug valve, plug valve, valve,
Plug valve, T-port
Plug valve, T-port,
Plug valve, L-port
Plug valve, L-port,
3-way plug valve
3-way plug valve, 3-way plug valve, plug valve, valve,
3-way plug valve 2
3-way plug valve 2, 3-way plug valve, plug valve, valve,
3-way plug valve 3
3-way plug valve 3, 3-way plug valve, plug valve, valve,
3-way plug valve, T-port
3-way plug valve, T-port, 3-way plug valve, plug valve, valve,
3-way plug valve, L-port
3-way plug valve, L-port, 3-way plug valve, plug valve, valve,
Mixing valve
Mixing valve, mixing valve, valve,
Characterized port valve
Characterized port valve, characterized port valve, valve,
Manual isolation
Manual isolation, manual isolation,
Power signal
Power signal, power signal,
Statically loaded
Statically loaded, statically loaded, actuating method,
Spring loaded
Spring loaded, spring loaded, actuating method,
Spring loaded 2
Spring loaded 2, spring loaded, actuating method,
Remote control
Remote control, remotely controlled, actuating method,
Diaphragm
Diaphragm, diaphragm, actuating method,
Diaphragm, positioner
Diaphragm, positioner, diaphragm, actuating method,
Chain operated
Chain operated, chain operated, actuating method,
Gear operated
Gear operated, gear operated, actuating method,
Solenoid
Solenoid, solenoid,
Weight loaded
Weight loaded, weight loaded, actuating method,
Weight loaded 2
Weight loaded 2, weight loaded, actuating method,
Weight loaded 3
Weight loaded 3, weight loaded, actuating method,
Float operated
Float operated, float operated, actuating method,
Float operated 2
Float operated 2, float operated, actuating method,
Dash-pot
Dash-pot, dash-pot,
Dash-pot 2
Dash-pot 2, dash-pot,
Piston
Piston, piston,
Quick opening
Quick opening, quick, open, close, opening, closing,
Quick opening 2
Quick opening 2, quick, open, close, opening, closing,
Quick closing
Quick closing, quick, open, close, opening, closing,
Quick closing 2
Quick closing 2, quick, open, close, opening, closing,
Connecting unit
Connecting unit, connecting unit,
Connecting unit 2
Connecting unit 2, connecting unit,
Connecting unit 3
Connecting unit 3, connecting unit,
Motor element
Motor element, motor element,
Motor element, opens on failure
Motor element, opens on failure, motor element,
Motor element, closes on failure
Motor element, closes on failure, motor element,
Motor element, retains position on fail
Motor element, retains position on fail, motor element,
Motor element, safe direction
Motor element, safe direction, motor element,
Regulating
Regulating, regulating, method of control,