check valve is suitable for the American standard nominal pressure PN1. 6Mpa- 42. 0 mpa, Class150 - 2500 lbs; Nominal diameter DN15 - 1200mm,PNS1/2 - 48. Working temperature: - 196 - 540 ( 吗? ) Among various kinds of pipe, prevent the backflow medium. The valve body material: carbon steel, stainless steel, etc. , can be used for water, steam, gas, oil, acid medium, etc. American standard check valve is my company according to the American petroleum institute ANSIB16. 34 and API16D standard manufacturing. Apply to lb - 150 2500 lb pressure pipe system such as water, oil, steam. Working principle: American standard check valve adopts the internal structure of radial swing. Circular coil axis of rotation, and through the medium flow driven disk medium. When the medium return, disc by its own weight and the effect of reverse medium close the valve. Product features: 1. Well-selected materials, in line with the relevant standards at home and abroad, high material quality as a whole. 2. The second step. Products in accordance with ANSI B16. 34 and 16 d API manufacturing. 3. Can be used in a variety of standards and flange pipe flange seal form, can meet the needs of all kinds of engineering and user requirements. 4. The valve body material is complete. Gasket according to actual working condition or request a reasonable choice. Suitable for all kinds of pressure, temperature and medium conditions. 5. Seal of advanced and reasonable. Disc seat sealing surface with iron base alloy or chromium cobalt tungsten carbide surfacing, wear-resistant high temperature resistant.

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