Diaphragm Valves/

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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Burkert Fluid Control Systems
Irvine, CA
800-325-1405
Burkert Fluid Control Systems is a global process valve supplier of high-quality customized fluid control systems and products. Some of our products include hygienic, biotech, process, dual weir, zero static tee valves and more. For additional information, please visit our website. Burkert is one of the world's top companies for measurement, control and regulation technology.
 
Aquasyn California LLC
Chatsworth, CA
818-350-0423
Meeting the needs of the bio-pharmaceutical industry, our industrial diaphragm valves are developed with a bonnet design for high performance & with Tork-Tite® feet which hold our hygienic valves in place with controlled compression. This minimal entrapment feature leads to an extended valve life. Our industrial diaphragm valves meet the needs of the bio-pharmaceutical industry.
 
AP Tech
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.
 
MarcWorks
Nashua, NH
603-889-0300
Sanitary diaphragm valves are our focus here at MarcWorks. Choose from diverting valves, bypass valves, backpressure regulators, 2-way & 3-way valves, mixing valves, and much more. We offer our own pioneered ultra-high purity bellows gas diaphragm biotech valve used in the biopharmaceutical industry. Our sanitary diaphragm valves have warranties to be free of manufacturing defects.
 
PR Valves, LLC
South Houston, TX
713-947-8044
Our company can be summed up in one word - valves. PR Valves, LLC is a stocking distributor for all of your diaphragm valves that you have been seeking. We carry many name brand hard-to-find rare diaphragm valves in cast steel materials and in strainers - duplex and simplex styles. Check out our huge selection of valves - common, specialized, unique, or we can modify one for you. simplex styles.
 
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Industry Information

Weir Valves

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. 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.