Pressure Test Method for various kinds of industrial valves including pneumatic valves as follows: 1. strength test valve pneumatic valve pressure test method shall be carried out at the ball half open. ① floating ball valve tightness test: The valve is partially open, one end of the introduction of the test medium and the other end closed; open the closed end of the examination several times when the ball is rotated, the valve is closed, at the same time check the packing and gasket sealing performance, You may not have leakage. Then introduced into the test medium from the other end, the test is repeated. ② fixed ball valve tightness test: Before the test the load rotate the ball several times, fixed ball valve is in the closed state, the introduction to the specified value from the end of the test medium; lead-sealing pressure gauge check, use a pressure gauge precision 0 .5 - 1, Taiwan Toyama Valve Co., Ltd., the range is 1.5 times the test pressure. Q within the prescribed time, there is no step-down phenomenon qualified; reintroduction test media from the other side and repeat the test. Then, the valve is partially open, closed at both ends, the cavity filled with media, check the packing and gasket at the test pressure, without leakage. 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 Jiangxi, to the media to the specified value, inspect the body and Bonnet 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 closed valve, Shanghai Guanlong valve Machinery Co., open another end check for leaks. If the valve strength and tightness tests are done, Guangzhou Kaiheng Valve Co., Ltd., can do first strength test, and then lowered to a predetermined value tightness test, inspection at packing and gaskets; then close the valve, open the outlet end Check sealing surface for leaks. _ Tianjin Tanggu Watts Valve Co., Ltd., the Hong Kong valve (Online) _ Jiangxi valve provided by the valve, the Hong Kong Science and Technology Co., Ltd. of Dongguan. Valve Co., Ltd., Dongguan Ming Kong (www.gdmgfm.com) is Dongguan, butterfly leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Ming Kong valve leadership with the staff warmly welcome all inquiries negotiations to create a better valve out of Hong Kong in the future.