China Quanxing DN1600 High-Pressure Swing Check Valve Delivered to a Circulation System Upgrade of YingHang Power Plant
Recently, Quanxing Valve Group successfully developed the PN40 large-diameter high-pressure bidirectional rotary ball valve (DN1600mm), which officially rolled off the production line and passed the rigorous testing of the National Pump and Valve Product Quality Supervision and Inspection Center. It has already been shipped to a large power plant for use in its circulating water system. This groundbreaking product solves the global challenge of metal sealing under high-pressure, large-diameter conditions, marking a new milestone for my country in the field of large-diameter high-pressure valves.
The PN40 DN1600mm large-diameter high-pressure bidirectional rotary ball valve developed by Quanxing Valve Group has overcome several technical bottlenecks. This valve adopts a pure metal hard-on-hard structure, with a bidirectional floating all-metal sealing design for the valve seat.
This structure ensures that the valve can achieve bidirectional zero-leakage sealing even under high-pressure environments.
The product employs a unique eccentric design, allowing the ball to instantly detach from the valve seat during opening and closing, achieving zero-friction rotation. This effectively solves the valve seat wear and jamming problems caused by friction in traditional valves. The valve core of the sealing pair has a compensation allowance; even after the valve seat wears, a slight rotation upon closing still ensures a reliable seal, significantly extending its service life.
In terms of manufacturing process, the valve sealing surface utilizes advanced processes such as aerospace plasma spraying to form a hard alloy gradient functional material, possessing both high strength and wear resistance, and its temperature resistance range can cover a certain range of harsh environments.
The DN1600mm large-diameter high-pressure bidirectional rotary ball valve, which successfully rolled off the production line, will be applied to the circulating water system of a large power plant. This operating condition requires the valve to not only possess high-pressure sealing performance but also withstand the erosion and wear of media containing particles. Compared with traditional valves, this rotary ball valve has superior shearing and self-cleaning capabilities, effectively preventing valve blockage, and is particularly suitable for operating conditions containing particulate media.
Power plant circulating water systems have extremely high requirements for valve reliability; a failure could lead to the shutdown of the entire unit. Quanxing Valve Group's product adopts a "hard-on-hard" sealing structure and eccentric design, effectively solving the problems of easy wear and leakage of the sealing surface of traditional valves under high pressure differential and particulate media conditions.
The successful application of this valve provides the power industry with a more reliable and durable valve option and lays a solid foundation for import substitution in the high-end valve field of China's manufacturing industry.
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