| 摘要 |
The control valve includes a device fitted into the main gas supply pipe leading to a domestic user's house. Within the cylinder of the device is a cone element (12) sliding under the effect of the gas pressure (Pe). The cone element includes sealing rings, and slides into a section of the casing which tapers to a reduced section at an angle ( alpha ). In extreme pressure conditions, the element may slide against the seating (17) within the casing, shutting off the supply of gas entirely. Normally however it regulates the supply pressure to a value determined by the spring strength (15). <IMAGE>
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