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Double Throttle Check Valve

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Double Throttle Check Valve

Flow control valves, Model Z2FS, are double throttle/Check Valves. They restrict flow to or from actuator ports (A & B) of a directional valve. Two throttle/check valves, symmetrically arranged in the housing, restrict flow with adjustable throttles in one direction while providing free flow in the opposite direction.


l Sizes 6 to 22

l For mounting:
– Size 6: Porting pattern according to ISO 4401-3, NFPA T3.5.1M R1,
and ANSI B93.7 D 03
– Size 10: Porting pattern according to ISO 4401-5, NFPA T3.5.1M R1,
and ANSI B93.7 D 05
– Size 16: Porting pattern according to ISO 4401-7, NFPA T3.5.1M R1,
and ANSI B93.7 D 07
– Size 22: Porting pattern according to ISO 4401-8, NFPA T3.5.1M R1,
and ANSI B93.7 D 08

l For limiting the main or pilot flow of one or two actuators

l Meter-in or meter-out throttling

l Adjustment type:
– Soft screw with locknut

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