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發(fā)布時間: 2012-10-30 09:40
正文摘要:1.外嚙合齒輪泵 1)防超過額定pd,裝設(shè)有安全閥 (safetyvalve) 安全閥閥體是一空心的圓柱體左端帶有錐形密封面當作用在環(huán)形凸肩上的壓力超過彈簧值時,閥開啟,溝通排、吸兩端泵的轉(zhuǎn)向必須符合規(guī)定 &n ... |
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