| 摘要 |
Valve-governing pilot with closure by membrane or by piston permits reduction of pressure at valve outlet and maintenance of pressure at its entry, dependent upon the way in which it has been connected. The same pilot can be used for various functions and by means of a few constructive changes it is possible to create an output limiting pilot. This pilot consists of a body on which a shaft is arranged inside a polytetrafluoroethylene piece, which by means of an internal membrane and a spring adjustable by a screw the pressure can be calibrated as is required at the entry and outlet of the valve.
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