Duckbill check valves are 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 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. Duckbill check valves are also designed to start functioning at specific opening and closing pressure ranges, depending on your specifications.
Features and Benefit
Reliable backflow prevention
100% elastomeric construction eliminates maintenance forged gate valves
Will not corrode, warp bronze gate valve or freeze open or shut
1"-2" Cracking Pressure, Low Head loss
Curved Bill enhances sealing around debris
Custom built for each application based on pressure and flow conditions
Available in diameters from 1/2" (12mm) to 96" (2400mm)
Gongyi City Liangda Tubes Co., Ltd which is in China. We are specialized in pipe fittings including rubber joints (threaded union type and flanged type), steel expansion joint, duck bill check valves and flanges etc. With good quality and competitive price, and our company has passed ISO 9001: 2000 Certification.
