Product Introduction

High-performance axial flow check valves arewidely used in pipelines such as oil and natural gas to prevent fluid backflow.The double-seal valve seat structure can make the valve reach zero leakage; thevalve body and the valve seat ring design adopts the venturi streamlined runnerdesign; the valve flap surface design adopts the spherical or full arc shapedesign; the valve body support frame tail adopts Conical structure; thepre-compression spring pushes the valve flap to act on the valve seat to formthe initial pre-tightening force, which plays a role in regulating the changeof the fluid, and can slow down the opening and closing speed of the valve, andrealizes through the guide rod and the guide sleeve. The valve is opened andclosed to eliminate or reduce the water hammer caused by the check valveclosing too fast, reduce the noise, form a silent effect, and at the same timehave the advantages of reducing pressure drop and rapid response.

Production Design Specification

Design&Manufacture：API 6D、ANSI B16.34；GB/T 21387

End to End：API 6D、ANSI B16.10；GB/T 21387

Connection：ASME/ANSI B16.5 & B16.47a& B16.25；GB、JB、HG；JIS；EN；DIN

Inspection & Test：API 6D、API 598；GB/T 26480

Product Features

The valve body is designed for forging orcasting                             

Specially designed double sealing seat, zero leakage,reliable sealing

No leakage                                

Fire-proof design, in accordance with API 6FA

All-round lifting ear and foot design                             

Wide range ofapplications, metal-sealed seats for a wider temperature range

Venturi runner design to reduce pressuredrop                          

Guided mating surface hardening treatment,long service life

Preciselydesigned springs ensure low pressure seals and minimum pressure opening          

Small water hammer phenomenon, low noise

Combination of material

Product range

Nominal Size：1/2"~48"(DN15~DN1200)

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

Suitable Temperature：-46~425℃

Connection method: flange, butt welding