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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.
There are many types of hydraulic valves. Angle valves admit media at an angle and permit maximum flow. Ball valves provide tight shut-off and reliable control. Block and bleed valves use a small port to depressurize the space between the inlet and outlet. Check valves prevent flow reversal. Control valves modify fluid flow. Directional valves steer process media through selected passages. Drain valves are used to remove surplus fluid from a system or container. Needle valves have a slender, tapered point at the end of a valve stem. Poppet valves open and close ports with a sealing device that includes a disk, cone, or sphere. Pressure relief valves remove excess upstream pressure. By contrast, regulators maintain a constant outlet pressure. Safety valves contain a thermal sensing component that opens or closes in response to temperature changes. Spool valves are actuated by a rotary or piston-like spool that slides back and forth to cover and uncover ports in the housing. Shut off valves close a line to stop flow when a pre-set condition occurs. Stack mounted, sandwich, or modular valves can be assembled to create a valve block.
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Engineering Web: Hydraulic Valves
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Hydraulic Valves: Providers and Solutions | Business.com Hydraulic Valves Home » Directory » Industrial Goods & GlobalSpec.com: Hydraulic Valves Provides database of suppliers for Hydraulic Valves. See Business.com, Inc. Information |
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Hydraulic Cylinders Prince Manufacturing Corporation Stack Valves Mono-Block Valves Loader Valves Relief Valves Flow Control Valves SP Gear Pumps See Prince Manufacturing Corp. Profile & Catalog |
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Tyco Flow Control, valves, actuators, pressure relief valve |
Part Numbers for Hydraulic Valves
| Part # | Distributor | Manufacturer | Product Category | Description |
|---|---|---|---|---|
| 5PG83 | Grainger Industrial Supply | HALDEX | Hydraulic Valves | Electric Lowering Valve,115 VAC |
| 1MTG2 | Grainger Industrial Supply | ENERPAC | Hydraulic Valves | Pressure Relief Valve,3/8 In NPTF Port |
| 4BA48 | Grainger Industrial Supply | EATON | Hydraulic Valves | Relief Valve,7/8-14 In UNF-2B Port |
| 4BA49 | Grainger Industrial Supply | EATON | Hydraulic Valves | Relief Valve,7/8-14 In UNF-2B Port |
| 5PG85 | Grainger Industrial Supply | HALDEX | Hydraulic Valves | Electric Lowering Valve,24 VDC |
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