PO check valve features

Sun Hydraulics PO check valves

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Sun Hydraulics PO check valves

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Sun PO check valves offer 5 sizes of cartridge capable of handling flows up to 480 lpm and pressures up to 350 bar.

Hardened poppet and seat

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A hardened poppet and seat give good life even under arduous operating conditions.

Standard 3:1 pilot

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Standard 3:1 pilot ratio.

Fluting arrangement

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The fluting arrangement on the inlet of the cartridge will distribute the flow equally around the poppet.

A range of different cracking pressures

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A range of different cracking pressures from 0.3 bar up to 7 bar.

A separate return spring

A separate return spring with low pressure cracking to ensure that the pilot piston is always returned to close the valve when the pilot pressure is removed.

Bleed through or sealed pilot

Versions are available with bleed through or sealed pilot. The bleed through option is normally the best as it ensures that air does not get trapped in the pilot line.

Leakage of less than 1 drop per minute

Leakage of less than 1 drop per minute. Tested at both high and low pressure.

Vent to atmosphere version

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A vent to atmosphere version is available to fit into the same cavity when a standard PO check is not suitable.

Four port vented version

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A four port vented version is available with a separate drain port where the vent to atmosphere is not acceptable due to the environment.

Manual over-ride

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A manual over-ride version is available with a manual over-ride so the valve can be opened if there is a power failure.

Standard or vent to atmosphere counterbalance

A standard or vent to atmosphere counterbalance is available to fit into the same cavity if the PO check is not suitable.