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Weir Valves

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A weir valve provides a higher rate of flow than many other types of diaphragm valves, and may be chosen for applications in which this higher flow is desirable. The weir valve can leave some opportunity for fluid to become entrapped in the valve. Read More…

Weir Valves A weir valve is a type of diaphragm valve in which the flow passage includes a weir, or a notch with a horizontal edge through which a substance flows. In the open position, the diaphragm lifts up and allows a substance to flow freely through the valve. Once in the closed position, the diaphragm closes down on the weir, shutting off flow partially or completely.
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Leading Manufacturers

Irvine, CA  |  800-325-1405

Burkert Fluid Control Systems is a global process supplier of high-quality customized fluid control systems and products, including diaphragm valves.

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Burkert Fluid Control Systems $$$

Irvine, CA  |  949-458-3731

We make a wide range of products that are engineered solutions for you! Our diaphragm valves are number one in the industry when it comes to quality and production time.

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International Polymer Solutions $$$

Arlington Heights, IL  |  800-733-1344

Yamada® Corporation has been a leading producer of fluid handling products for over 60 years. As a leader in pneumatic pumping technology, Yamada® is known in industries worldwide for its innovative products, superior quality and unmatched reliability. Yamada’s ISO 9001 certification ensures quality procedures for manufacturing bellows pumps, dampeners and more.

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Yamada America, Inc. $$$

Wilmington, MA  |  800-282-8823

Watson-Marlow Fluid Technology is a leader in the diaphragm valve industry. Our expert team works side by side with our customers to ensure that our products fit their needs. For more information about our diaphragm valves, visit our website or give us a call today!

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Watson-Marlow Fluid Technology Group $$$

Lancaster, PA  |  717-509-2200

We manufacture a variety of butterfly control valves—stainless steel, lug, wafer butterfly valves, standard, custom, shut-off and more. ITT knows the various chemical, fluid and gas processes and engineers products accordingly. Our brand names include Fabri-Valve®, Richter™, Pure-Flo®.

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ITT Industries, Engineered Valves $$$
placeholder image Burkert Fluid Control Systems International Polymer Solutions Yamada America, Inc. Watson-Marlow Fluid Technology Group ITT Industries, Engineered Valves

The diaphragm in a weir valve is designed to seal on a sealing bead outside the weir area. In the open position, the diaphragm lifts up and exposes the valve body along the perimeter of the bowl. As the valve closes, the diaphragm closes back toward the body of the valve, allowing small amounts of fluid to become trapped.

Weir valves may be operated manually, or they may be pneumatic or motorized. They can be constructed from several materials, including cast iron, cast steel, brass or plastics. Depending on the material from which they are constructed, they may be used to control the flow of materials at various pressures and temperatures. Weir valves may have different body configurations. A straight-through body has one entrance port and one exit port. A t-valve body style allows flow to enter or exit from two ports, and multi-port weir valves allow flow to enter or exit the valve from three or more ports.

Weir Valve Informational Video

 
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