| 摘要 |
A valve for transmitting pressurized fluid from a fluid supply to receiver means, such as an actuating power cylinder, and for exhausting the transmitted fluid when the pressure of the fluid supply drops, comprises a check valve carrying an elastomer seal, the seal being moved in a direction to cover exhaust port means and to admit fluid through the valve during fluid infeed, and to be returned by the back pressure to cover the infeed means when the pressure of the fluid supply drops permitting cylinder exhaust. An O-ring positioned interiorly of the valve body is employed to act as a check valve seal.
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