Deadline pressure test method and throttle valve shut-off valve and the throttle strength test, usually on the assembled valve pressure test stand, open the valve, the valve, to the media to a predetermined value, Shanghai Guanlong Valve Machinery Limited, check valve and the valve cover is sweating and leakage. It can also be single strength test. Tightness test only shut-off valve. When the test shutoff valve stem into a vertical position, the valve open, medium introduced from the bottom end of the valve to a predetermined value, check the packing and gaskets at; until qualified to close the valve, turn on the other side to check for leaks. If the valve strength and tightness tests are done, you can do first strength test and tightness test down to a predetermined value, check the packing and gaskets place; then close the valve and open the outlet end of the sealing surface inspection for leaks. Check valve pressure test method Test status: Lift check valve axis in the horizontal position and vertical; swing check valve and valve channel axis approximately parallel to the axis in the horizontal position. Strength test, the Shanghai and Shanghai Valve Manufacturing Co., Ltd., the introduction of the test medium from the inlet end to a predetermined value, and the other end closed, Guangzhou Kaiheng Valve Co., body and bonnet look no leakage in compliance. Tightness test test medium is introduced from the outlet end, check the sealing surface at the inlet end, packing and gaskets at no leakage in compliance. Taiwan Toyama Valve Co. | valves | valve out of Hong Kong, the Hong Kong valve provided by the Dongguan Science and Technology Co., Ltd. Valve Co., Ltd., Dongguan Ming Kong (www.gdmgfm.com) strong, credible, butterfly and other industries in Dongguan, Guangdong has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead valve and you work out of Hong Kong into the brilliant, for a better future!