GB / T12234-2007 universal valve flange and butt weld steel gate valves GB / T12235-2007 General valves Flanged steel globe valves and lift check valves GB / T12236-2008 General valves - Steel swing check Valve GB / T12237-2007 universal valve flange and welded steel ball valves GB / T12238-2008 common valve flange and wafer butterfly GB / T12239-2008 General valve diaphragm GB / T12240-2008 General valve Iron cocks Valve GB / T12241-2005 valve general requirements GB / T12243-2005 Spring loaded safety valve JB / T2766-1992 PN16.0 ~ 32.0MPa pipes, fittings, valves ends dimension JB / T2769-2008 PN16.0 ~ 32.0 MPa threaded flange JB / T2770-1992 PN16.0 ~ 32.0MPa connector nut JB / T2771-1992 PN16.0 ~ 32.0MPa joint JB / T2772-2008 PN16.0 ~ 32.0MPa blind JB / T2773-1992 PN16.0 ~ 32.0MPa stud JB / T2774-1992 PN16.0 ~ 32.0MPa order end stud and screw size Shanghai Guanlong Valve Machinery Co., Ltd. Guangzhou Kaiheng Valve Co., Ltd., the Hong Kong _ _ valve valve from Dongguan Ming Port Valve Technology Limited. 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!