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Rubber duckbill valve for sewage made in our company have been receiving reputation not only at home but overseas. This duckbill valve is our special product, and it is used for draining sewage.

Duckbilled Check Valve are precision-molded, one-piece elastomeric valves that provide reliable backflow prevention at low-pressure differentials. Our duckbill check valves allow free flow with positive differential pressure. With negative differential pressure, backflow is checked. Pressure drop across the valve is a feature unique to Duckbill check valves. They can be designed to operate in a few millimeters (inches) of water to several hundred kPa (psi), depending on valve size, geometry, and compound characteristics.


Clamp Type Duckbill Check Valve

Clamp Type Duckbill Check Valve

  • Clamp Type Duckbill Check Valve
  • Clamp Type Duckbill Check Valve
  • Clamp Type Duckbill Check Valve
Clamp Type Rubber Duckbill Check Valve

Clamp Type Duckbill Check Valve

1. Standard construction

2. Very quiet operation with no water hammer

3. Its unique design prevents backflow

4. Negligible maintenance and energy costs

5. Will not warp or freeze

6. Quick interchange with any flap type check valve

7. Available in sizes 1" – 96"

8. Available with special I.D to suit concrete pipe


Duckbill valve with flange connection are also designed to start functioning at specific opening and closing pressure ranges, depending on customers' specifications. We can also supply various flanges of ANSI, DIN, BS, JIS ect. for your choosing.

Main Data
Pipe Size ID LengthHeightEmbed Depth
DN(mm)NPSL(mm)HB
50215010025
80322014040
100425020040
150634026550
200842032550
2501052042575
30012620525115
35014700625115
40016800725135
45018900825150
50020980925200
6002411201025200
7002811801125200
8003213501400250
9003615001525250
10004016001725250
12004818401950300