swing check valve selection in the nominal pressure PN1. 6 ~. - 4 mpa, working temperature 29 ~ 550 ℃ in the petroleum, chemical, thermal power plant under various working conditions such as the pipeline. Applicable medium: water, oil, steam, etc. Structure and characteristics of 1, well-selected materials, in line with the relevant standards at home and abroad, the material of high quality in an all-round way. 2, seal pair of advanced and reasonable, disc and seat sealing surface with iron base alloy or state department ( 了) Cobalt-based hard alloy welding surface, wear-resisting, high temperature resistance, good corrosion resistance, abrasion resistance, long service life. 3, product design and manufacture according to the national standard GB/T12235. 4, can be used in a variety of piping flange standards and flange sealing type, can meet the needs of all kinds of engineering and the user requirements. 5, body materials, variety complete, the gasket can be reasonable selection according to actual working condition or the user requirements, can be applicable to all kinds of pressure, temperature and medium conditions. 6, can according to user requirements design and manufacture of different structure forms and the connection form of check valve, for all kinds of form a complete set of equipment using

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