Check valve

The main structural features are:

　　 1. The product has reasonable structure, reliable sealing, excellent performance and beautiful appearance.

　　 2. The sealing surface is welded with cobalt-based cemented carbide, which is wear-resistant, corrosion-resistant, corrosion-resistant, good in resistance to sassafras, and has a long service life.

　　3. Built-in pin structure reduces external leakage points and is reliable in use.

　　4. When the pressure is ≥16.0MPa, Class 1500, the valve cavity adopts a self-tight sealing structure. The higher the medium pressure, the better the sealing performance.

　　5. The material of the parts, flanges, and butt-welding end sizes can be reasonably selected according to actual working conditions or user requirements to meet the needs of various working conditions.

　　Design standards: API 6D, ASME B16.34, API 594, BS 1868, GB/T 12235, GB/T 12236, JB/T 8937

　　Structural length: ASME B16.10, API 6D, GB/T 12221

　　Connection standards: ASME B16.5, ASME B16.47, ASME B16.25, GB/T 9113, JB/T 79, HG/T 20592

　　Pressure test: API 598, API 6D, GB/T 13927, GB/T 26480

　　Pressure and temperature rating: ASME B16.34, GB/T 12224

　　Main material: WCB, WC6, WC9, C5, CF8, CF8M, CF3, CF3M, A105

　　Nominal diameter: NPS 1/2″～NPS 48″ DN50～DN1200

　　Pressure range: CL150～CL2500 PN1.6～16.0MPa

　　Working temperature: -29℃～+570℃

　　The swing check valve is suitable for the pipelines of various working conditions in the petroleum, chemical, pharmaceutical, fertilizer, and electric power industries with a nominal pressure of PN1.6-16.0MPa, Class150~2500, and working temperature of -29-570℃ to prevent media Backflow.