Q47H hard seal fixed ball stringent production standards I. Product Overview: ??? Q47H manually fixed ball points and three-stage two-stage fixed ball fixed ball (side-mounted split ball). Fixed ball in the pipeline is mainly used to intercept, media distribution and modification activities. Fixed ball pivot structure ensures accurate ball bearing. Seat selection of stretched spring construction norms, the seat for the ball, guarantee outstanding low pressure sealing function. The ball two seats can each seal, which has bi-directional sealing characteristics. Fixed ball using its own drain valve can be discharged out of the body cavity pressure. Fixed ball pivot selection of anti-blowout maintenance structure, low coefficient of friction bearing, with good function, high reliability and wide use, reasonable price and other advantages. The valve is used in chemical, petroleum, natural gas, metallurgy, and other professional and hydrogen sulfide-containing media, impurities, corrosion serious long distance gas pipelines. Second, product characteristics: 1, fixed selection of fixed ball valve design, the relative moving parts are made of self-lubricating materials of friction coefficient is extremely small, so small torque operation, in addition to long seal grease seal, making the operation even more sensitive. 2, the valve selection of high-channel configuration, ISO5211 norm convergence, enabling devices electric / pneumatic actuators more specialized. 3, stationary valve selection full bore or reduced bore design, small flow resistance. 4, metal seal O-type fixed selection of two-way valve seal movable metal structure, with active compensation and self-cleaning function, the sealing function is superior. 5, fixed selection of fixed ball valve design, and an increase in spring preload stretched so with active relief valve function. 6, each valve has two movable seal seat, in both directions can be sealed, and therefore not to be considered when the flow of media devices. 7, with fire anti-static structure between the stem and the body and the stem and a conductive stretched spring ball, to prevent static electricity ignition point of the flammable fluids. Ensure system security. 8, fire-resistant construction dual maintenance, leaving the ring when the event of a fire burning, the respective sealing parts can form metal ball hard sealing structure of the metal. 9, active relief structure, when retained in the valve chamber of the liquid medium as the temperature rises and gasification, and abnormal pressure in the chamber increases, the chamber can rely on their own media thrust to promote active pressure relief valve and then ensure the safety valve. 10, optional pneumatic, electric, hydraulic, and pneumatic Conditioning, Power Conditioning. For details, please refer to the book actuator and control valve parts. Third, the technical parameters: test pressure (Mpa) Nominal pressure (Mpa) pressure level (Class) 1.6 2.5 4.0 6.4 10.0 16.0 25.0 150 300 400 600 900 1500 2.4 3.8 6.0 9.6 strength test 15.0 24 37.5 3.1 7.8 10.2 15.3 23.1 38.4 seal test 1.8 2.8 4.4 7.0 2.2 5.6 7.5 11.0 17.6 27.5 11.2 16.8 28.1 0.5-0.7 airtight test temperature PTEE≤150 ℃ PPL E≤300 ℃ Carbon ≤350 ℃ Medium C:??? water, oil, steam P:? nitrate class (temperature ≤200 ℃?) R:? acid type (temperature ≤200 ℃?) Fourth, the main part parameters: ball valve stem gasket sealing surface temperature suitable packing medium WCB 1Cr13 1Cr13 1Cr13 Stellite body Profile stainless steel and flexible graphite flexible graphite 08 mild steel F304? F316 flexible graphite braided graphite -29-425 ℃ water, steam, oil WC6 15CrMo 15CrMo -29-425 ℃ WC9 25Cr2MoV 25Cr2MoV LCB 304 304 -46-354 ℃ CF8 304 304 -196-600 ℃ some acid, alkali CF3 304L 304L CF8M 316 316 CF3M 316L 316L