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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. $$$

Napa, CA  |  707-259-0102

Advanced Pressure Technology (AP Tech), manufactures flow & gas handling devices. Among the products we produce is our springless diaphragm valve used for ultra high purity applications. Our hygienic valves are tailored to meet your specific needs & are backed by reliability & service support. Our gas handling components are used strictly for semiconductor and wafer fabrication.

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AP Tech $$$

New York, NY  |  585-492-5800

Here at Steel & O'Brien Manufacturing we know quality matters, know your customers, develop products for top speed turn around times and trusted performance. Founded in 1990, Steel & O’Brien is a leader in the sanitary and high-purity process industry, specializing in high-quality standard and custom machined/fabricated fittings and assemblies, quick turnaround, and very competitive pricing. Call us today.

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Steel & O'Brien Manufacturing $$$

Levittown, PA  |  800-800-1908

It is our primary goal that we are able to treat each and every customer as if they were number one in hopes of turning first time customers into lifelong connections as well as to exceed customer expectation one hundred percent of the time in order to keep you coming back to us for all of your diaphragm valve needs! To receive more information about our company get in touch with our customer service staff today!

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Simtech USA $$$
placeholder image Burkert Fluid Control Systems International Polymer Solutions Yamada America, Inc. AP Tech Steel & O'Brien Manufacturing Simtech USA

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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