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Relief, pilot operated spool type


Cartridge valve

Relief, pilot operated poppet type

Marginal Column

Flow is blocked from 1 to 2 until pressure increases to meet the selected valve setting, lifting the conical, pilot-stage poppet from its seat. This action exhausts oil above the main-stage piston (spool type), allowing it to shift and provide relief flow through 2 to tank. Pressure at 2 is additive to the relief setting of the valve.

  • Common cavity
    • Size 10
    • size 16


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