OEM Ductile Iron SS304 SS316 Non-return Swing Check Valve Manufacturer, Manufacturers
OEM Ductile Iron SS304 SS316 Non-return Swing Check Valve Manufacturer, Manufacturers
OEM Ductile Iron SS304 SS316 Non-return Swing Check Valve Manufacturer, Manufacturers
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OEM Ductile Iron SS304 SS316 Non-return Swing Check Valve Manufacturer, Manufacturers
OEM Ductile Iron SS304 SS316 Non-return Swing Check Valve Manufacturer, Manufacturers
OEM Ductile Iron SS304 SS316 Non-return Swing Check Valve Manufacturer, Manufacturers

OEM Ductile Iron SS304 SS316 Non-return Swing Check Valve Manufacturer, Manufacturers

Non-return swing check valve are used in pipes under pressure between 1.6-42.0. Working temperature between -46℃-570℃. They are widely used in industries include oil,chemistry, pharmaceutical and power generation to prevent the back flow of the medium. And the same the time, the valve material can be WCB,CF8,WC6, DI and etc.
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Product Description

Product Overview & Operational Principle

Check valve, also known as one-way valve, check valve, back pressure valve, this type of valve is automatically opened and closed by the force generated by the flow of the medium itself in the pipeline, and belongs to an automatic valve. The function of the check valve is to prevent the backflow of the medium, the reverse rotation of the pump and its driving motor, and the discharge of the medium in the container. Double-plate check valve is a very common type of check valve. By choosing different materials, the wafer check valve can be applied to water, steam, oil in petrochemical, metallurgy, electric power, light industry, food and other industries. , nitric acid, acetic acid, strong oxidizing medium and urea and other media.
The swing check valve adopts a built-in rocker arm swing structure. All the opening and closing parts of the valve are installed inside the valve body and do not penetrate the valve body. Except for the sealing gasket and sealing ring used in the middle flange, the overall There is no leakage point, eliminating the possibility of valve leakage. The connection between the rocker arm and the disc of the swing check valve adopts a spherical connection structure, so that the disc has a certain degree of freedom in the range of 360 degrees, and has proper trace position compensation. It is mainly used in petroleum, chemical, pharmaceutical, fertilizer, etc. , electricity and other pipelines. Suitable for clean media, not suitable for media containing solid particles and high viscosity
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Technical Specifications & Material Standards

Size & Pressure Rating & Standard
Size DN50-DN600
Pressure Rating PN6, PN10, PN16, CL150-600
Face to Face STD API609, BS5155, DIN3202, ISO5752
Connection STD PN6, PN10, PN16, DIN 2501 PN6/10/16, BS5155
Material
Body Cast Iron(GG25), Ductile Iron(GGG40/50), Carbon Steel(WCB A216), Stainless Steel(SS304/SS316/SS304L/SS316L), Duplex Stainless Steel(2507/1.4529), Bronze, Aluminium Alloy.
Disc DI+Ni, Carbon Steel(WCB A216), Stainless Steel(SS304/SS316/SS304L/SS316L), Duplex Stainless Steel(2507/1.4529), Bronze, DI/WCB/SS coated with Epoxy Painting/Nylon/EPDM/NBR/PTFE/PFA
Stem/Shaft SS416, SS431, SS304, SS316, Duplex Stainless Steel, Monel
Seat NBR, EPDM/REPDM, PTFE/RPTFE, Viton, Neoprene, Hypalon, Silicon, PFA
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Frequently Asked Questions (FAQ)

What is the primary function of a check valve?

The check valve functions automatically using fluid flow force to prevent medium backflow, protect pumps and driving motors from reverse rotation, and stop the unintended discharge of media from system containers.

Which industrial media can wafer check valves handle?

Depending on the material configuration chosen, they can be utilized for water, steam, oil, nitric acid, acetic acid, strong oxidizing media, and urea across petrochemical, power, metallurgy, light industry, and food sectors.

How does the swing check valve prevent body leakage?

It utilizes a built-in rocker arm swing design where all moving internal components are kept inside without penetrating the valve body. Except for the middle flange gasket and sealing ring, there are no external leakage points.

What types of media are NOT suitable for swing check valves?

Swing check valves are engineered specifically for clean media and are not recommended for media containing solid abrasive particles or having high viscosity.

What size ranges and pressure classes are available?

The valves cover nominal dimensions from DN50 to DN600, with operating pressure ratings across PN6, PN10, PN16, and Class 150 to Class 600.

What standards govern face-to-face dimensions and flange connections?

Face-to-face dimensions follow API609, BS5155, DIN3202, and ISO5752, while connection standards conform to PN6, PN10, PN16, DIN 2501, and BS5155.

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