Check valve duckbill, umbrella, ball

Name: Check valve duckbill, umbrella, ball
Brand: Darcoid
Availability: PreOrder

Molded and Ground Balls are rubber spheres of high dimensional accuracy, providing an effective and efficient check valve function to seal against hydraulic fluid, water or air. Duckbill seals are precision slit to create efficient and predictable one way sealing or pressure relief. Umbrella seals are tuned via dimensioning and material formulation to provide predictable lift/burst load and roll back.

Specs

Pressure Low, Medium

Dynamic Service Speed N/A

Seal Directionality Unidirectional

Manufacturing Method Compression, Transfer

Common Modifications Surface modifications and coatings

Catalog Standards Varies by OEM

Customizable Yes

Comparative Cost $$

Special Applications

Materials, break force, installation types vary with application requirements

More Information

Venting and purging - three different approaches

Precision ground/molded balls, duckbill seals, and umbrella seals all perform functions of one-way pressure relief valves. Each approach has its own design considerations and performance envelopes. Schedule a conversation with our technical team to learn which is best the application you're working on.

Check Valve Duckbill, Umbrella, & Ball FAQs

How do I choose between a duckbill valve, umbrella valve, and ball check valve?

The best approach depends on the required cracking pressure, backflow prevention, available package space, media, flow rate, particulate exposure, orientation, and required life. Duckbill and umbrella valves use elastomer geometry to create the one-way function, while ball-style designs use a discrete sealing element and seat. The design should be selected around the fluid-control requirement rather than simply choosing the smallest geometry.

What determines the opening or cracking pressure of an elastomer check valve?

Cracking pressure is influenced by geometry, elastomer properties, wall or lip thickness, interference or preload, and manufacturing tolerances. Material choice also matters because temperature and media exposure can change elastomer stiffness over time. For applications where cracking pressure is critical, the complete valve geometry and operating environment should be evaluated and validated through testing.

What should I provide to develop a custom check-valve seal?

Provide the surrounding hardware or CAD, desired cracking and reseal pressure, operating pressure range, media, temperature, required flow, allowable leakage or backflow, expected cycle life, and sterilization or cleaning requirements if applicable.