China Check Valve Manufacturers Suppliers Factory - Customized Check Valve Made in China

Reliable Check Valve Solutions for Backflow Prevention

Check valves are automatic flow control devices designed to allow fluid flow in one direction while preventing reverse flow in pipelines. Available in lift, swing, wafer and axial flow designs, they help protect pumps, compressors and industrial equipment in water treatment, petroleum, chemical and power applications.

Lift Type Check Valve
Lift Type Check Valve is an automatic non-return valve designed to prevent reverse flow in industrial pipelines. It uses an axially guided piston disc that opens under forward pressure and closes when flow stops or reverses.
view more
Swing Type Check Valve
Swing Type Check Valve is a non-return valve with a hinged disc mechanism that prevents reverse flow in pipeline systems.
view more
Dul-Plate Wafer Type Check Valve
Dual Plate Wafer Type Check Valve is an industrial valve designed for automatic reverse flow prevention and directional fluid control in pipeline systems.
view more
Single Plate Wafer Type Check Valve
Single Plate Wafer Type Check Valve is a wafer-style non-return valve designed to prevent reverse flow in industrial pipeline systems.
view more
Axial Flow Check Valve
An Axial Flow Check Valve, also known as an axial check valve or axial non-return valve, is an automatic valve designed to prevent reverse flow in pipeline systems. It uses an axial movement mechanism to maintain controlled one-way...
view more
Butterfly Check Valve
Butterfly Check Valve is an industrial valve manufactured for pipeline systems to prevent reverse flow and maintain reliable one-way fluid control.
view more

Technical Specifications

Parameter	Technical Details & Industry Standards
Design & Manufacture	API 594, API 6D, BS 1868, ASME B16.34, EN 12334
Size Range	DN15 to DN1200 (1/2" to 48")
Pressure Rating	Class 150 to Class 2500 / PN10 to PN420
Temperature Range	-20°C to 550°C (Material Dependent)
Testing Standard	100% Tested per API 598 / ISO 5208 (Shell & Seat Leakage)
Face to Face Dimension	ASME B16.10, API 594, EN 558
End Connections	Wafer, Lug, Flanged (RF/RTJ), Butt-Weld (BW)
Special Designs	Non-Slam Axial Flow, Spring-Assisted Fast Closing

Check Valve Design Features

Non-Slam Fast-Closing Response:

Axial flow and spring-loaded dual plate designs utilize low-inertia discs and pre-loaded springs to achieve instant closure prior to flow reversal, eliminating destructive water hammer and pressure surges.

Zero-Leakage Metal & Resilient Seating:

Available with precision-machined Stellite metal-to-metal seats for high-temperature/abrasive media, or NBR/EPDM/VITON soft seats achieving ANSI/FCI 70-2 Class VI zero-leakage performance.

Low Pressure Drop Efficiency:

Engineered with streamlined flow passages and optimized disc contour angles to minimize turbulence and permanent pressure loss across the pipeline system.

Product Range

Lift Type Check Valve

Compact structure with reliable sealing performance, suitable for general industrial pipeline systems requiring stable one-way flow control.

Swing Type Check Valve

Uses a hinged disc design to provide low pressure loss and reliable backflow prevention for large pipeline systems.

Dual Plate Wafer Type Check Valve

Lightweight wafer design with compact installation structure, suitable for space-limited pipeline applications.

Single Plate Wafer Type Check Valve

Simple and compact design for efficient installation and general fluid control systems.

Axial Flow Check Valve

Designed for high-flow applications with low resistance and fast response characteristics.

Butterfly Check Valve

Compact automatic valve design combining lightweight structure with reliable backflow prevention performance.

Selection Guide

Application Requirement	Recommended Check Valve Type
General industrial pipelines	Swing Check Valve
Limited installation space	Wafer Check Valve
Pump outlet protection	Swing or Lift Check Valve
High flow rate applications	Axial Flow Check Valve
Fast response requirements	Axial Flow or Spring-Assisted Design
High temperature or demanding media	Metal Seat Check Valve

Industrial Applications

Water & Wastewater Treatment: Check valves prevent reverse flow in water supply, treatment systems and pump stations, helping maintain stable operation.

Petroleum Industry: Used in oil pipeline systems, processing equipment and pump protection applications to prevent reverse flow.

Chemical Industry:

Suitable for fluid control systems requiring proper flow direction and material compatibility.

Power Generation:

Applied in cooling water systems, steam systems and auxiliary pipelines.

Marine Industry:

Used in ship piping systems for water, fuel and other fluid control applications.

HVAC Systems:

Applied in heating and cooling systems to maintain correct flow direction.

Manufacturing & Quality Capability

With more than 20 years of valve manufacturing experience, PORO operates a 23,186㎡ production facility and provides integrated valve manufacturing and supply capability.

Manufacturing Advantages

Long-term experience in industrial valve production since 1997

Manufacturing capability covering multiple valve categories

Material options including CS, LTCS, SS, DSS and Alloy Steel

Production according to international standards including ANSI, DIN, BS, JIS and GB

Export experience serving customers across multiple global markets

Quality Control

PMI Material Verification:

100% Positive Material Identification on all alloy/stainless steel valve bodies and trims via portable XRF spectrometers.

100% Pressure Testing:

Hydrostatic shell testing (1.5x working pressure) and high/low-pressure seat closure testing strictly per API 598 / ISO 5208.

Dynamic Closure Test:

Functional testing for spring actuation and disc hinge alignment to ensure smooth, unhindered seating movement.

productcate-572-787

OEM & Custom Solutions

Special Cracking Pressure (Spring pre-load customization for spring-assisted designs)

Non-Slam & Damped Closing Mechanisms (Hydraulic dampers for heavy-duty swing check valves)

Hardfaced Sealing Surfaces (Stellite No. 6 overlay for abrasive slurry and high-temperature service)

Packaging & Shipping

Packaging:

Export-standard packaging with protection against damage during handling and international transportation.

MOQ:

Flexible MOQ available according to valve type, specifications and order requirements.

Lead Time:

Production schedule depends on valve design, material requirements, quantity and customization level.

Shipping:

Support international shipment with export documentation and delivery terms according to customer requirements.

p202503101716382af0b.jpg (1000×1333)

FAQ

Q: What types of check valves does PORO manufacture?

A: PORO provides lift type, swing type, wafer type, axial flow and butterfly check valves for industrial applications.

Q: How does a check valve work?

A: A check valve allows fluid flow in one direction and automatically closes when flow reverses to prevent backflow.

Q: How do I select the right check valve?

A: Selection depends on media type, pressure, temperature, flow rate, installation space and required standards.

Q: What materials are available for check valves?

A: PORO supplies check valves in cast iron, carbon steel, stainless steel, duplex stainless steel and alloy steel.

Q: What sealing options are available?

A: Available sealing options include metal seat, rubber seat and PTFE seat designs.

Q: What connection types can be provided?

A: Check valves can be supplied with wafer, flanged, threaded and butt weld connections.

Q: Can PORO manufacture customized check valves?

A: Yes. PORO provides OEM production according to customer drawings, specifications and technical requirements.

Q: What industries use check valves?

A: Check valves are widely used in water treatment, petroleum, chemical, power generation, marine and industrial systems.

Q: Can PORO check valves be installed in vertical pipelines?

A: Yes. Dual plate wafer check valves and spring-loaded axial flow check valves can be installed in both horizontal and vertical upward-flow pipelines. For swing check valves in vertical installations, spring assistance is recommended.

Q: Does PORO provide custom cracking pressure check valves?

A: Yes. We can customize the internal spring load to achieve specific cracking pressures (opening pressures) according to your pipeline design requirements.

With abundant experience, we are one of the most professional check valve manufacturers and suppliers in China. We warmly welcome you to buy customized check valve made in China here from our factory. If you have any enquiry about cooperation, please feel free to email us.