China Check Valve Manufacturers, Suppliers and Factory - Customized Check Valve

Wuxi PYNOS Flow-tech Co., Ltd. : Your Professional Check Valve Supplier in China

PYNOS VALVE is a professional valve manufacturer integrating research, development, testing, production, sales, and after-sales service. Additionally, we are equipped with world-class valve processing and manufacturing equipment.

Advanced Production Equipment

Our factory is equipped with advanced CNC lathes, boring machines, CNC grinding machines, drilling machines, milling machines, and planers.

Wide Applications

Our products are widely used in the petroleum, chemical, power, natural gas, and coal chemical industries.

Guaranteed Quality

Our products have obtained multiple certifications, including ISO 9001, CE, and SIL3.

Customizable

The materials, dimensions, and connection methods of our products can all be customized.

API 6D Swing Check Valve
The API 6D Swing Check Valve is a swing-type check valve that meets API 6D standards. Forward flow pushes the disc open, and it closes against the seat by gravity or spring when flow stops or
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API 6D Piston Check Valve
The API 6D piston check valve conforms to the stringent API 6D standard and is a core fluid control component in the oil and gas, chemical, energy, and pipeline transportation industries.
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Cryogenic Check Valve
A cryogenic check valve is a type of valve specifically designed for fluid systems in extremely low-temperature environments. Its primary function is to prevent backflow of liquids or gases in cold
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Introduction

A Check Valve is a type of one-way valve that allows fluid (liquid or gas) to flow in only one direction and automatically prevents backflow. It operates automatically without manual intervention or external power.

Specification

Product name	Check valve
Size Range	2"～30"
Pressure Range	150LB~2500LB
End Connection	Flanged end /Butt welding end
Valve Direction	Uni-directional
Temperature Range	Down to -196℃
Service	LNG/LN₂/LO₂terminals,Air separation plants
Material	Body:A351 CF8M,and moreTrim:HF/HF

Features of Check Valve

Automatic operation

No need for manual control.

One-way flow

Prevents backflow and protects pumps, compressors, and pipelines.

Multiple types available

Swing, lift, ball, wafer, and dual-plate designs.

How to Install

Check Flow Direction

Always install the check valve according to the flow arrow marked on the valve body.

Orientation and Position

Swing check valves: Prefer horizontal pipelines; the hinge pin should be horizontal. Can also install vertically with upward flow.
Lift check valves: Can be installed vertically or horizontally; ensure sufficient straight pipe length to reduce turbulence.
Ball or dual-plate check valves: Can be installed in horizontal or vertical lines depending on manufacturer instructions.

Pipe Alignment

Ensure the pipeline is properly aligned with the valve flanges or ends.

Support and Anchoring

For large valves, provide independent support to prevent stress on the valve body.

Cleanliness

Remove dirt, welding slag, and debris from the pipeline before installation. Check the valve interior for any foreign material that could prevent proper sealing.

Certificate

FAQ

Q: What are the common types of check valves?

A: Common types include swing check, lift check, ball check, wafer check, and dual-plate check valves. Each type is suited for specific pressure, flow, and space conditions.

Q: How does a check valve operate?

A: The valve opens automatically when fluid flows forward. If flow reverses, the disc, ball, or plate moves to close the valve, preventing backflow.

Q: Can check valves be used for throttling?

A: No. Check valves are designed for full open or full close operation. Throttling can cause seat damage, vibration, and leakage.

Q: How does a check valve prevent water hammer?

A: Some check valves, like slow-closing or spring-assisted designs, reduce the rapid closure of the valve, minimizing water hammer. Proper pipe design and sizing also help.

We're well-known as one of the leading check valve manufacturers and suppliers in China. If you're going to buy high quality check valve, welcome to get more information from our factory. Customized orders are welcome.

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