Rubber Duckbill Valves & Rubber Duck Bill Valve, is one kind of one way valves & air pressure relief valves, which is unique, one-piece silicone rubber slit cutting components that act as backflow prevention devices or check valves, and elastic lips which in aim to prevent backflow or allow forward flows.

Rubber Duckbill Valves Materials

Rubber duckbill valve not only made from silicone rubber VMQ, FDA food grade & medical grade silicone, but also made from different elastomer rubber  or plastic materials like: FKM, NBR, CR, etc.

FVMQ & Fluoro Silicone Duckbill Valve generally applied to automotive industry mechanical industry and aerospace industry. Fluorosilicone rubber is noted for its good resistance to organic solvents and petroleum based fluid. If have high requirements about Duckbill Valve's aging resistance, high temperature resistance and fuel, oil, solvent and chemicals resistance, FVMQ Duckbill Valve is highly recommmended.

EPDM Duckbill Valves are excellent in anti-oxidation, anti-ozone and anti-erosion. EPDM rubber is classified into polyolefin family, so it has excellent curing properties. Among all rubbers, EPDM has the lowest density. Therefore, EPDM can absorb a large quantity of fillings and oils, meanwhile, it has little influence on properties, which can be used to manufacture low-cost rubber compounds. 

Nitrile Rubber & Buna N Duckbill Valves have Good Physical Properties, like Oil resistance, Aging resistance, heat & oil resistance and chemical resistance and chemical resistance. While their cold tolerance and storage stability are not very well.

Neoprene Rubber Duckbill Valves, known as CR duckbill check valves, have good chemical stability and maintains flexibility over a wide temperature range. Neoprene Rubber Duckbill Valves are used in a wide variety of applications, such as laptop sleeves, orthopedic braces (wrist, knee, etc.), electrical insulation, liquid and sheet applied elastomeric membranes or flashings, and automotive fan belts.

Rubber Duckbill Valves Mold Tools

Rubber Duckbill valve also called slit cutting valve, which need punching by die cut tooling after silicone rubber compression molding or LSR injection production. This process is key to duckbill check valves quality.

Rubber Duckbill Valve not only take full advantage of elastomeric silicone physical properties, and also need make the most of die or slitting cutting usage. Generally, Silicone Rubber duckbill valves hardness, cutting area and slit cutting technology which key to non return valve quality. Rubber Duckbill Check Valve, which range of application is widely than umbrella valves because good air or liquid fluid controller functions.