Ball valve (in the fields of marine engineering and shipbuilding, it should be a globe valve), defined in the standard GB/T21465-2008 "Valve Terminology"

Electric butterfly valve belongs to a variety of electric valves and electric regulating valves. The main connection methods for electric butterfly

Generally, low to medium pressure shut-off valves have low inlet and high outlet. When cutting off, the packing is not subjected to force, reducing the probability of leakage and extending the service lifeGenerally, shut-off valves with DNA100 can use high inlet and low outlet; It is difficult to cl

1) The materials for the valve body, valve cover, and flange should be selected according to the usage conditions and manufacturing requirements, and should comply with the provisions of GB 12228, GB 12229, GB 12230, and GB 3077.2) The materials for bolts and studs can be A5, 25, 35, 30CrMoA, and 40