Product Introduction
Check valves are widely used in oil, natural gas, chemical, electric power, urbanconstruction and other industries to prevent media backflow. The valve body canbe selected from a forged or cast valve body; the valve flap is designed in theform of a swing type and a lift type, and the sealing surface is welded with acorrosion-resistant and wear-resistant hard alloy. The swing-type check valvecan be designed as a full-opening structure to facilitate the cleaning of thepipeline. The large-diameter check valve can be designed with a buffer dampingstructure to protect the seat sealing surface and reduce the damage of waterhammer on the piping system. the valve seat is designed to be detachable andthe body itself is surfacing; the sealing surface is welded to the valvesealing surface and the corrosion-resistant and wear-resistant hard alloyensures the sealing is reliable and safe to use. Different materials can beused to meet the needs of various working conditions. It is suitable for a widerange of media, temperature and pressure. It is widely used in water, steam,oil, nitric acid, acetic acid and strong oxidizing media.
Design Specification
Design&Manufacturing:ASME B16.34;API 6D;API 602;BS 1868;BS 15761;GB/T12236
End to End:ASME B16.10;GB/T12221
End Connection:ASME/ANSI B16.5 & B16.47a& B16.25;GB、JB、HG;JIS;EN;DIN
Inspection & Test :API 598;GB/T26480;BS 12266
Product Features
Optional full-open design for clearing pipelines
Sealing surfacing,corrosion resistance, wear resistance and hard alloy
The valve body is forged or cast
Bolted or welded bonnet
Swingand lift flap design
Nie buffer structure can be set to reducewater hammer
Removable and welded two seat structure types
Easy to install, horizontal pipes and verticalpipes can be installed.
Combination Of Material
Body | Plate | Seat |
A216 WCB /A105 A216 WCB/A105 A352 LCB/A350 LF2 | A216 WCB /A105+13Cr A216 WCB/A105+STL A352 LCB/A350 LF2+STL | A105+13Cr A105+STL A350 LF2+STL |
A217 WC6/A182 F11 A217 WC9/A182 F22 | A217 WC6/A182 F11+STL A217 WC9/A182 F22+STL | A182 F11+STL A182 F22+STL |
A351 CF8/A182 F304 A351 CF8M/A182 F316 A995 4A/A182 F51 | A351 CF8/A182 F304 A351 CF8M/A182 F316 A995 4A/A182 F51 | A182 F304+STL A182 F316+STL A182 F51+STL |
Product Range
Nominal Diameter:1/2"~48"(DN15~DN1200)
Pressure Rating:ANSI/ASME 150LB~2500LB(PN16~420Mpa)
Suitable Temperature:-46~550℃