Technical requirements and pressure test experiment of electric ball valve Technical requirements and pressure test experiment of electric ball valve produced by Henan Guomao: 1. The material of sleeve and flange of electric ball valve is 20; The bolt material is 35; The brake screw material is 2CR13.
Valve ring material: butadiene acrylonitrile valve I-2 with oil as medium and chloroprene valve III-2 with water as medium; 2. Except that the medium is oil, the steel parts of expansion joints of other applicable pipelines are subject to hot zinc treatment; In general, the installation size is L1. According to the purpose of joint use, it is feasible to adjust the value of L1, but the maximum straightness shall not exceed 1.5L1. The electric ball valve shall be subject to hydraulic test: 1. DN65-150, with Pm=2.4mpa for sealing test; 2. DN200-400, conduct sealing test with Pm=1.5Mpa; The electric ball valve belongs to the middle joint of pipeline pneumatic valve. The standard used in general pipeline system is GB/T12456-2007 electric ball valve production. The earliest one is GB/T12456-1997 double flange expansion joint, which is composed of body, seal ring, gland, expansion spool and other main parts. On the basis of the original performance of the loose sleeve expansion joint, a limiting device is added, and the maximum expansion amount is locked with a double nut. The pipeline can expand and contract freely in the allowable expansion and contraction amount. Once the maximum expansion and contraction amount is exceeded, the limit will be reached to ensure the safe operation of the pipeline. It is especially suitable for the connection in the pipeline with vibration or a certain slope and turn.