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pilot operated pressure relief valve

The pilot-operated valve opens completely over a narrow pressure range. this allows the circuit to operate over a wider pressure range without loss of fluid over the relief valve. a functional diagram of a pilot-operated relief valve is shown in fig. 3.8.
Pilot operated safety relief valves operation tyco reserves the right to change the contents without notice page 2 normal closed position relieving position 0% dome piston seal main valve piston main valve seat blowdown adjustment system 100% of set blowdown seat relief seat set pressure adjustment pilot pilot 100% of set discharge dome 100% of ...
Parkeru2019s pilot operated relief valves are designed for continuous duty applications featuring great stability with low pressure drop; working with pressures up to 420 bar (6000 psi) and flows up to 400 lpm (106 gpm).

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