The technology of pressure holding valve/pilot valve can be found on the official websites of SMC, SCHUNK and other companies.

When it comes to special applications such as lifting movement and anti-loose jaws, in order to prevent the object from falling suddenly, in the event of power failure, air cut-off, etc., a pressure holding valve (pilot valve) can be added to the cylinder exhaust port, and the exhaust port can be opened only when the air supply port of the pressure holding valve (pilot valve) is provided.

Pressure Retaining Valves/Pilot Valves

Figure 2 1 Application example of vertical motion cylinder pressure retaining valve

Pressure Retaining Valves/Pilot Valves

Figure 2 2 Anti-loosening principle of pressure retaining valve (pilot valve).

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