Valve test pressure 1, valve shell test pressure refers to the valve body and bonnet made of such association to test the valve the pressure shell, which aims to test the valve body and valve cover, dense and includes valve body and valve cover join in the pressure within the capacity of the entire shell. ASME B16.34-2004 standards for the United States, shall be not less than 38 ℃ when the material valve at the appropriate pressure rating of 1.5 times. When the valve of the shell tests have special requirements, technical requirements should be the appropriate product or ordering agreements. 2, valve seals and the sealing test pressure testing hoist parts and body sealing surface between the sealing performance and stem seal with the valve cover sealing performance of the test pressure deputy. U.S. ASME B16.34--2004 standard, shall be not less than 38 ℃ when the valve at the appropriate materials, 1.1 times the rated pressure.