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Poppet Type On Off Valve

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Application
Typical usage includes the control of actuators in a
hydraulic system, decompression of hydraulic fluid in heavy
cylinders etc.
Operation
Normally Open
De-energised
2 to 1 – full flow, pressure
difference through the pilot orifice
holds the main poppet open.
1 to 2 – restricted flow, main
poppet seated due to pressure
differential.
Energised
2 to 1 – No flow, pilot orifice closed,
main poppet seated due to pressure
differential.
1 to 2 – full flow when the solenoid
force is overcome.
Normally Closed
De-energised
2 to 1 – no flow, pilot orifice closed,
main poppet seated due to pressure
differential.
1 to 2 – full flow when spring force
is overcome.
Energised
2 to 1 – Full flow, pressure
difference through the pilot orifice
holds the main poppet open.
1 to 2 – restricted flow, main
poppet seated due to pressure
differential

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