Information about Hydraulic Valves

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About Hydraulic Valves

Hydraulic valves contain and transfer the flow and pressure of hydraulic fluid in hydraulic power systems. They range from simple shutoff valves to precision control valves. Common types of hydraulic valves include angle, ball, block and bleed, check, control, cartridge, directional, drain, needle, poppet, pressure relief, safety, shut off, solenoid, spool, and stack mounted valves. In their unpowered state, hydraulic valves can be normally open (open center) or normally closed (closed center). Hydraulic valves with a tandem center connect the pressure and tank ports, but block the service ports to allow system unloading and isolation of the service lines. Devices with a float center allow the supply to be shut off and enable the load to move to other services.

Engineering Calculators Related toHydraulic Valves

Loss in Fluid Lines Calculator; Open Channel Flow Calculator; Pressure Loss in Straight Liquid Lines Calculator

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Butterfly Valves

Butterfly valves control flow through a circular disc or vane by turning the valve's pivot axis at right angles to the direction of flow in the pipe. They are normally used as throttling valves to control flow.

Check Valves

Check valves are self-activating safety valves that permit gases and liquids to flow in only one direction, preventing process flow from reversing. They are classified as one-way directional valves.

Globe Valves

Globe valves are linear motion valves with rounded bodies, from which their name is derived. They are widely used in industry to regulate fluid flow in both on/off and throttling service.

Needle Valves

Needle valves are small valves used for flow control in liquid or gas services. The fine threading of the stem and the large seat area allow for precise resistance to flow.

Pinch Valves

Pinch valves include any valve with a flexible elastomer body that can be pinched closed, cutting off flow, using a mechanism or fluid pressure.

Solenoid Valves

Solenoid valves are devices that use a solenoid to control valve activation.

Solids Valves

Solids valves are used to control or regulate the flow of powder, granular and other bulk solid materials along a process line, or to and from process units, storage bins, conveyors and product packaging.

Engineering Web: Hydraulic Valves - Machine Design

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Hydraulic cartridge valves \| Machine Design Hydraulic cartridge valves February 21, 2002
Hydraulic and Pneumatic Valves: Solenoid and Air-Pilotoperated... Hydraulic and Pneumatic Valves: Solenoid and Air-Pilotoperated Valves Appears in Print As: Solenoid and Air-Pilotoperated Valves
Pressure Valves \| Machine Design In a hydraulic system, valves may control pressure, flow to an actuator, or quantity of flow permitted past a given point.

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