Duckbill Umbrella Combination Valve ( Two Way Valve )

Duckbill/umbrella combination valves are two valves in one single elastomeric component. One side is a duckbill valve, the other side is an umbrella valve. The function and advantages of both of these types of valves is in detail described in“How Does A Duckbill Valve Work”and “What is An Umbrella Valve ”. We recommend to make your self acquainted with their function and features and benefits.

Back Valve Duckbill/umbrella combination valves work with a specific seat design which is to be integrated into the metal or plastic application. In order to find the proper seat design and thickness you may use our preferred seat design instructions and adapt them further to your specific needs. For example if your valve needs high flow then you make the flow orifices in the seat as large as possible even with slots in the shape of a banana. On the other hand if your valve has low flow or needs to withstand high backpressure, you need only to apply one or more small flow orifices and take care that the outside diameter of the flow surface area doesn't get too close to the edge of the umbrella in order to make sure that there is enough seat surface area to support the diaphragm under backpressure.

Back Valve is a niche company dedicated to the development, manufacturing and worldwide distribution of a broad variety of miniature, self-actuating valves and elastomeric valve components for OEMs. We have specialized in automatic high-volume manufacturing and offer our own range of standard duckbill and umbrella valves from our catalog. They are supplied off the shelf in several sizes and materials. That means they are readily available in any quantity, from a few to millions of parts per year. We also develop customized valve solutions.

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Back Valve International