| 摘要 |
1,213,147. Servo-operated relief valves. GPE CONTROLS Inc. Dec.5, 1967 [Dec.8, 1966], No.55365/67. Heading G3P. A pressure relief valve comprises a main closure member 16 carried by a resilient stainless steel bellows 20. Gas from inlet 14 can pass through fixed or adjustable throttle 26 to the interior of the bellows and is vented by pilot valve 34 at a predetermined pressure to allow openings of the main closure member. The bellows 20 is guided by rods 23 and the main closure member can abut stops 50. |
