| 摘要 |
Simple fluid power control valves for use with pneumatic and/or hydraulic pressurized working fluids, of springless valve construction whose central longitudinal bore slidably receives a pin which is permanently secured with appropriate seals to allow it to float axially inside the bore, from a one closed position when the pin end with seal is subjected to the fluid pressure of the working fluid at the infeed valve end, to another open position when the opposing pin end is subjected to an external force which is greater than the fluid pressure end thrust at the infeed pin end, said external force being caused by pin actuation manually, by toggle, hand or foot lever, by a timer cam or by pilot pressure, said pin floating with seals, allowing for fast valve response as a result of short travel designed therein.
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