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

Product Range

Nominal Diameter：1/2"~48"(DN15~DN1200)

Pressure Rating：ANSI/ASME 150LB~2500LB(PN16~420Mpa)

Suitable Temperature：-46~550℃