Butterfly Valves/

Wafer Butterfly Valves

Wafer butterfly valves are typically sandwiched between two flanges using bolts and nuts; the pressure of the nuts on the backside of the flange holds the valve in place. Wafer butterfly valves are the more common of the two designs of butterfly valves, the other design being lug style.

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Butterfly Valves & Controls Inc.
Grapevine, TX
817-421-5343
Butterfly Valves & Controls, as the exclusive USA Representative of Value Valves Co. suppliers resilient seated wafer & lug butterfly valves along with high-performance, triple eccentric & AWWA butterfly valves. In-house assembly of valves with lever or gear operators, electric or pneumatic actuators. We strive to offer the finest service in the business, quality packaging & responsive deliveries.
 
Advanced Valve Design Inc.
Whitehall, PA
610-435-8820
At Advanced Valve Design, our standard butterfly valves can be used for air, gas and water applications where absolute "tight" shut-off is not required. Our standard valves are available in wafer or lug and are designed to fit between ANSI 125/150 LB or RPM flanges. We are able to manufacture designs capable of handling temperatures from -20ºF to +450ºF. To learn more, please visit our website.
 
ABZ Valves & Controls
Madison, KS
620-437-2440
ABZ Valves & Controls is a manufacturer of American-made, resilient seated, rubber seated and Teflon® seated butterfly valves. These valves are used for chemical, food, sanitary and general-purpose applications. Our quality products, competitive pricing and prompt deliveries continue to make our company prosper. We are ISO 9001-2008. Call us today for your butterfly valve needs.
 
Stockton Valve Products
Houston, TX
713-664-2918
Stockton Valve is a supply chain partner offering valves, actuators, flanges & hoses, expansion joints & couplings & valve automation services. In business since 1954, we still serve industrial & commercial markets. We offer high performance butterfly valves & resilient butterfly valves as well as ball, gate, check valves & more. Whatever you need we offer precise solutions & professional support.
 
Quadrant Valve & Actuator, LLC
Broussard, LA
877-625-5858
Quadrant Valve & Actuator was founded in 2000 with a single focus on designing and manufacturing the safest, most contemporary quarter-turn valve products available anywhere on the globe. Quadrant succeeded with the introduction of its proprietary lines of seal-welded, ASME/API/ISO code compliant ball valves and butterfly valves that solve customers' real-world safety and code-compliance issues.
 
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Wafer Butterfly Valves

In addition to being easier to install, wafer butterfly valves are cheaper than the lug style. These two differ in a couple of senses. First, the lug butterfly valve design has threaded inserts and can be installed using nuts but no bolts whereas the wafer style requires nuts and bolts. Both are attached in conjunction with flanged butterfly valves, the centre piece bolted into where the piping meets, protected by the extended edges of flanges that serve as a tight and efficient seal. Basically, the lug style is employed more often in environments where the pipes may need to be separated without bothering the other side, while wafer valves are effective against backflow. Because of the prevalence of the uni-directional system preference, the wafer design is more popular. The only disadvantage is that, unlike lug designs, wafer butterfly valves cannot be moved. Because of the advances in machining techniques, both styles can be built to fit perfectly, ensuring the most precise and leak free valve possible.

Wafer butterfly valves consist of a seal that fits around the wall of a pipe, a round disc, and a control lever. The wafer butterfly valves discs' rotates ninety degrees at the turn of the lever. When the disc is parallel to the flow of water, the valve is in open position and lets all gases or liquids pass; when the handle is turned, the disc rotates around to a position parallel to the flow of water. In this closed position, the disc fits snugly into the seal and blocks all flow through the pipe. Wafer butterfly valves can be made of a variety of materials, including stainless steel, plastic, and other metals. Although plastic is cheaper, it is not used as often because it is more prone to corrosion then the metals used, such as cast iron. Aluminum is also occasionally incorporated to make the gasket part of the valve, since it is a lightweight and flexible metal. Wafer butterfly valves are used to control the flow in water distribution, chemical services, and ventilation applications.