| 摘要 |
A diaphragm divides a chamber into two segments, the first of which includes an air input port and an outlet port formed by a tube which contacts the diaphragm. On the other side of the diaphragm, a variably adjustable spring actuated piston urges the diaphragm to closure against the outlet port. Incoming air pressure deflects the diaphragm away from the outlet port against the spring and air compression, to allow predetermined exhaust air flow. A valved opening behind the diaphragm provides safety against diaphragm tear and malfunction.
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