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Slip On Duckbill Check Valve(2"**4") Supply Range is From *0mm to **0mm Stainless Steel Clamps Connect with Pipe End Cost-effective and Maintenance Free Backflow Prevention Automatically Most Professional Mamufacturer From China
Slip On Duckbill Valves(2"**4")
Duckbill Valve, widely used in the demanding applications of many industries, are precision-molded, one-piece elastomeric valves that provide reliable backflow prevention at low pressure differentials.  Duckbill valves rubber 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.  Duckbill Check Valves are also designed to start functioning at specific opening and closing pressure ranges, depending on your specifications. 
Slip on duckbill valve DV-XH*1A Features:
Reliable backflow prevention
**0% elastomeric construction eliminates maintenance
Will not corrode, warp or freeze open or shut
1”*2” Cracking Pressure, Low Head loss
Custom built for each application based on pressure and flow conditions
Available in diameters from 1/2" (*2mm) to *4"
Note:
1. The inner diameters are matched to the pipe outer diameter on which installed.
2. The weight is approximate.
3. The dimensions are not integrated in the above table, contact Liangda for more information.
4. We can make duckbill valves with any inner diameters upon request.
5. PCS are the number of half part of the clamps
6. The usual material of the clamp is stainless steel **4, other material availble upon request.
7. Duckbill valves of dimensions in the above table are available in inventory. Any other dimensions and designs available upon request.