like to be open at this time, you can loosen the valve cover thread Vacuum pumps and a half circle to circle, remove the stem stress, and then board the hand wheel. (B) Note Temperatures above 1,200 ℃ valve, as installed at room temperature, and normal use, temperature, thermal expansion bolts, clearance increased and must be tightened again, called "hot tight", the operator should pay attention to this a work, or prone to leakage. 2, when the cold weather, long-closed stop valve, the valve should be water exclusion.

基于1个网页-相关网页