Forged steel check valve is a kind of check valves, forged steel check valve flow refers to rely on the media itself, and automatic opening and closing valve, used to prevent the backflow medium valve, also known as the non-return valve, check valve, flow valve, and back pressure valve. Check Industrial Valves belongs to a kind of automatic valve, its main role is to prevent the backflow medium, to prevent the pump and drive motor reversal, and the discharge of the container medium. Forged steel check valve usually applies to some of the small diameter of the valve and high pressure. There are three kinds of forged steel check valve bonnet design forms: the first is bolted bonnet, according to the form design of the valve, the valve body and bonnet connected by bolt and nut, spiral wound gasket ( 316 clamp flexible graphite manufacturing) Seal. When customers have special requirements, also can use a metal ring joint. The second design form is welded bonnet, according to the design forms of the valve, the valve body and bonnet with threaded connections, all-welded seal. When customers have special requirements, also can be used through welding connection. The third is the sealing cover, according to the form design of the valve, the valve body and bonnet with threaded connections, internal pressure since the ring seal. Advantage is that the higher the internal pressure, the greater the sealing performance is better. Forged steel check valve standard: design and manufacture meet API602 and ASMEB16. 34. BS5352 inspection and testing by API598, mark according to MSS - SP- 25. The socket end meet ASMEB16. 11. JISB2306 threaded end ( NPT） In line with the ANSI/ASMEB1. 20. 1; BS21; IS07/1; JISB0203
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