According to the actual operation of nuclear power valveResilient Seated Gate Valves conditions, nuclear power, its technical characteristics and requirements of the valve thermal valve higher than that. Technical requirements for nuclear power in addition to conventional valve valve technical requirements, but also consider the media focused on the pollution of impurities, ambient temperature, operating temperature, humidity, radiation, DCAutomatic Control Valves power supply and voltage fluctuations, the stability of the earthquake and vibration conditions technical requirements, security levels and so on. The design of nuclear power valve Strength Design Nuclear power valve design, strength calculation is essential. In addition to conventionalButterfly Valves strength calculation, finite element analysis and seismic calculation, the one on nuclear safety valve, also called for: a film stress of the limit calculation, a thin film stress + bending stress limit calculation, and circuit Co - circulatory arrest time plus the extent of the limits of secondary stress calculation, in addition to the loop Kai - other than a lay-off status of the change plus secondary stress range limit calculation, fatigue analysis. Structural Design As the nuclear power system to carry radioactive media mostly do not allow any leakage, so thePlug Valves structural design of the filler valve, bellows seal valve seat structure design is particularly important (body shape design, provides ASME standards). Abroad, filling the general use of multiple sealing structure, Ω ring seal between the fill and the folder structure and the disc spring of the stuffing box seal structure. Bellows bellows seal combination commonly Safety Valves used structure. Of the importanthigh-pressure valves, valve seat structure by forging. In addition, the valve body and pipeline connections with butt or socket welded.