| 单词 | priming valve |
| 释义 | > as lemmaspriming valve priming valve n. Engineering †(a) a valve in the cylinder of a steam engine which allows water carried over by priming to escape (obsolete); (b) a valve that operates in connection with the priming of a pump. ΚΠ 1875 E. H. Knight Amer. Mech. Dict. III. 1788/2 Priming-valve, a spring valve fitted to the end of a cylinder, to permit the escape of water without danger to the machinery from the shock of the piston against the incompressible fluid. 1920 Times 16 Oct. 6/3 On arrival at the gulley, the pump is put into gear... The engine is then accelerated, the priming valve closed, and the suction at once begins. 1998 Public Works (Nexis) Jan. 62 Two vacuum priming valves are located..inside the valve vault. These valves work in combination with the vacuum priming system to remove any entrapped air from the pipeline. < as lemmas |
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