| 摘要 |
A differential pressure controller includes means for controllably metering a flow of air therethrough to an external control device, the metering means including a valving member and a nozzle coacting with the member for metering the flow of air. Also included in a plurality of diaphragms coacting with the valving member and defining a first chamber for receiving a first pressure signal and a second chamber for receiving a second pressure signal. One of the pressure signals includes a component representative of a master control signal. Metering of the flow of air is in response to a pressure difference between the first pressure signal and the second pressure signal.
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