non return check valve


  • Size:DN50-DN300

  • Pressure: PN16

  • Standard: DIN 2501 PN6/10/16, BS5155


  • Body :Ductile Iron

  • Seal : Stainless Steel +EPDM

  • Stem : Stainless Steel 304


  • Medium: Water, Waste Water, Oil

  • Temperature: -20 to 120℃


Detail / Feature / Application

Detail / Feature / Application

  • Small volume, light weight, compact structure and convenient maintenance.

  • The dual plate can be self closed due to the elastic torque.

  • Fast closing can effectly avoids the back-flowing of the medium and the water hammer effect.

  • Small face to face dimension, simple structure and good reliability.

  • Good sealing effect, zero leakage.

  • It is mainly applied to oil, chemical, food, medicine, textiles, paper making, water supply and drainage, smelting and energy department ,also used as single direction valves

Structure classification

According to the structure, it can be divided into three types: lift check valve, swing check valve, and butterfly check valve:

1. Lift check valves are divided into two types: vertical and horizontal.

2. The swing check valve is divided into three types: single, double, and multiple.

3. The butterfly check valve is a straight-through type.

The above check valves can be divided into four types in connection form: threaded connection, flange connection, welding connection, and wafer connection.

Material classification

1. Cast iron check valve

2. Brass check valve

3. Stainless steel check valve

4. Carbon steel check valve

5. Forged steel check valve

Function classification

1. swing type check valve

2. non return check valve

3. swing check valve
4. double check valve
5. wafer check valve
6. non slam check valve
7. rubber check valve

8. double check valve
9. spring check valve
10. dual check valve

11. non slam check valve

12. silent check valve

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