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Pilot-To-Open Check Valve

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Sun Hydraulics’ pilot-to-open check cartridges are non-modulating, on-off devices used for holding a load or actuator in position. Sun pilot-to-open check cartridges can be directly integrated into your actuator or applied using manifolds with many mounting options.
Offer protection against hose breaks
Positively lock pressurized loads
Are available in non-vented (3-port) and vented (3- and 4-port) versions
Are physically interchangeable with counterbalance cartridges (same number of ports, same cavities, same flow path for a given frame size).