• DN800 Rubber Disc Check Valve

DN800 Rubber Disc Check Valve

Features: Size: DN50-DN900
Pressure Rating: PN16/PN25
Material: Ductile Iron
Design Standard: DIN3352 F4,  LIGHT TYPE
Inspection Standard: EN12266
Application medium: Drinking water, sewage, seawater, irrigation or other neutral liquid
Application Temperature: -40°C~150°C

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Brief introduction of rubber disc check valve:

Rubber disc check valve is installed in the pump outlet, or other prevent the backflow medium pipeline, reduce the water hammer protect the safety of the pipeline and water pump. It is mainly composed of body, cover and disc of three main parts. The reinforced nylon disc rubber coated, the disc can be used more than 1 million times, scouring resistance, prolong service life. With a small head loss, not easy to pile up sundry, simple maintenance and so on characteristics. Open pressure is small, close short journeys, closing speed, reduce the water hammer.

DN D1 D2 D3 L C n-ød WT
350 520 460 429 787 26.5 16-ø23 234
400 580 515 480 813 28 16-ø28 300
450 640 565 530 914 30 20-ø28 414
500 715 620 582 1016 31.5 20-ø28 512
600 840 725 682 1295 36 20-ø31 804
700 910 840 794 1448 39.5 24-ø31 1198
800 1025 950 901 1500 43 24-ø34 1600
900 1125 1050 1001 1956 46.5 28-ø34 2500

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1.WESDOM patent products, patent certification

The product side flanges comply with national, German, Russian, American, British and Japanese standards and other domestic and international standards for multiple pressures, easy connection and wide adaptability, which can reduce the type of purchase and stock.

2.The product has an independent identity to ensure traceability

Each wesdom product has its own unique identification number, to ensure product traceability.

3.Provide material inspection report

All wesdom products can provide the material inspection report of the main parts.

4.One-stop service

One-stop service, we not only supply high quality products, also supply solutions and after-sales service.

5.WESDOM has a lot of project experience

We have a lot of project experience in countries such as Pakistan and the Philippines, WESDOM has always been noticed all over the world, and trust comes from quality.

6. WESDOM has a strict quality control system

WESDOM has a strict quality control system and before delivery, we test 100% of each product to ensure its quality, promising you a high quality product.

Quality Control Process



PN(MPa) 1.0 1.6
Test pressure (MPa) Shell strength 1.5 2.4
Sealing property 1.1 1.76
Operating temperature -20-80C
Applicable medium Water, oil, etc
 Main components name The material
Body Nodular cast iron
Cover Nodular cast iron
Disc Carbon steel + reinforced nylon + NBR
Gasket Nitrile rubber

Advantages of rubber disc check valve:

①Low losses and easy maintenance

The valve adopts the whole design flow area, with a small head loss, not easy to pile up sundry, simple maintenance and so on;

②Good elastic sealing effect

Rubber disc with steel plate and reinforced nylon fabric as parent,NBR is adopted to improve the overall plastic bags, plastic bags, geometry size accurate, elastic sealing effect is good. The elasticity of the rubber disc for not the top of the steel skeleton, the elastic limit open device on the back of the rubber disc. Reinforced nylon rubber coating technology on the disc, scouring resistance, switch life can reach more than 1 million times;

③Low opening resistance, easier to achieve quick opening and closing

Rubber disc in place with the valve axis into 45°Angle, in order to achieve reduce open resistance, quick quick opening.

④Equipped with cushioning device

To the large diameter (DN400 above) can choose buffer cylinder device, of which 85%。90% schedule for quick closing,10% × 15% stroke is slowly closing. Slow closing time can be adjusted, the adjusting range is 1 ~ 15 seconds, in order to reduce the damage to the pump water hammer.


All equipment either as a whole or its relevant parts have absolute compatibility.



Rubber disc check valves can be widely used in chemical, petroleum, metallurgical, pharmaceutical, food, sewage treatment, and other industries, mainly to prevent the backflow of media and gas backflow in the pipeline, and to ensure the safe and stable operation of the pipeline system.

Specific application areas include:

1. Gas transmission system: 

The use of a rubber disc check valve to stop the backflow of natural gas or other gas to avoid gas explosions or fires.

2. Sewage treatment systems: 

Rubber disc check valves can be installed in sewage treatment lines to prevent the backflow of sewage and ensure the normal operation of sewage treatment stations.

3. Chemical industry: 

In the chemical production process, the rubber disc check valve can prevent the backflow of media, avoid the cross-contamination of the mixture and ensure the quality of the production products.

4. Water supply and drainage systems: 

Used in water treatment and water supply pipelines to prevent the backflow of sewage and wastewater and to ensure the stable operation of water supply and drainage systems in cities.

5. Building and fire-fighting systems: 

Used in the drainage pipes of buildings and fire-fighting systems to prevent the spread of sewage and fire and to protect personal property.

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