What is a Pressure Control Valve and Why Do You Need It?

Pressure control valves are found in virtually every hydraulic system, and they assist in a variety of functions, from keeping system pressures safely below a desired upper limit to maintaining a set pressure in part of a circuit.

 

Every pressure control valve switches (or controls) at a predetermined pressure setting. The switching pressure is generally a variable setting on the valve itself. A change in position of the pressure control valve (i.e. open or closed) occurs either gradually (by control) or suddenly (by switch). Pressure shut-off valves and pressure sequence valves are hydraulic valves with a fixed throttle whereas relief and reducing valves are hydraulic valves with a variable throttle.

 

Pressure valves are hydraulic valves that gradually (control) or suddenly (switch) change in position.

 

The most common types of pressure control valves are the pressure relief valve and the pressure reducing valve. Pressure relief valves control the system pressure by relieving part, or all, of the flow to tank. Pressure reducing valves reduce the pressure supplied to a sub-system of a hydraulic system. Sequence valves are used to direct the flow to a secondary circuit. Unloading valves are used to direct flow to tank at pre-set system pressure.

 

Type of Pressure Control Valves

 

  • Pressure valves, relief function
  • Pressure valves, reducing function
  • Pressure valves, fixed throttle

 

A hydraulic system can only function – as per requirements – by using valves. Thus, you should always look for the correct type of hydraulic valve to serve your intended purpose. You can try to browse the website of ASHUN, the professional hydraulic valves manufacturer in the industry, to get more information about pressure control valves. If you have any questions, welcome to contact with ASHUN via email or telephone!

 

 

Article Source: https://dta.eu/hydraulics/hydraulic-valves/pressure-controls/

Article Source: http://www.hydraulicspneumatics.com/200/TechZone/HydraulicValves/Article/False/6411/TechZone-HydraulicValves