Valve Butterfly

Image provided by Victaulic

A butterfly valve has a wafer-shaped body with a thin rotating disc as the closing device. Like the ball valve, the butterfly operates with a one-quarter (90°) turn to fully open or fully close. Butterfly valves may also be used as balancing valves. The disc is always in the passageway, but since it is relatively thin, it offers little restriction to the flow. When the valve is closed, the disc edge fits tightly against a ring-shaped liner (seat).

Butterfly valves generally have one-piece bodies that fit sandwich style between two pipe flanges. The two most common body types are wafer body and lug body. The wafer body is placed between pipe flanges, and the flange bolts surround the valve body.

The lug body has protruding lugs that provide bolt holes matching those in the flanges. An advantage of the lug body type is that piping on one side of the valve may be disassembled while the valve remains bolted in place, allowing for the remainder of the system to continue in operation.

Another butterfly-valve design has an extended body for connections to grooved end piping. In this valve, the sealing member is the disc itself, which is fully encapsulated with a resilient material selected for the service conditions at hand. Butterfly valves continue to grow in popularity for a variety of reasons. Butterfly valves are lightweight, easy to install, low in cost, easy to actuate, easy to insulate, feature one-quarter turn operation, require less space (no rising stem), provide tight shutoff (due to resilient seal), and are made in a variety of construction materials.

Manufactures and Suppliers Participating in OPUS

Apollo Valves

Apollo Valves manufactures the best valve and connection technologies in the Industry, providing...
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ASC Engineered Solutions

ASC Engineered Solutions is defined by quality-in its products, services and support. With more...
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BELIMO Americas

Belimo is a world leader in the design, manufacture and marketing of damper actuators, control...
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F.W. Webb Company

F.W. Webb Company is a multi-faceted distributor of plumbing and heating, HVAC and controls,...
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Ferguson specializes in providing PVF, Plumbing, HVAC and Related Specialty Products and...
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Galloup Company

J.O. Galloup Company is a premier distributor of commercial and industrial piping products,...
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Hajoca Corporation

Founded in 1858, the Hajoca Corporation is the largest privately owned wholesale distributor of...
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Johnson Controls, Inc.

Johnson Controls, Inc. manufactures, installs, integrates, services and operates systems that...
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Jomar Valve

Founded in 1966 by former Navy Commander Joseph Martin, Jomar Valve set out to change the way...
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Kitz Corporation of America

Established in 1951, Kitz Corporation is one of the world's leading valve manufacturers. Major...
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Metraflex Company

For over 55years Metraflex has met the needs of the contractor. The MetraLoop, a flexible pipe...
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Milwaukee Valve Company, Inc.

Serving the mechanical contractor since 1901, Milwaukee Valve Company, Inc. produces the highest...
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MORSCO is a leading U.S. distributor of commercial and residential plumbing, HVAC, and PVF, with...
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Mueller Industries, Inc.

Mueller Industries, Inc. is the leading U.S. manufacturer of copper tube, copper fittings and...
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NIBCO Inc. is a recognized industry leader of flow control solutions to the residential and...
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Parker Hannifin manufactures Transair, a robust piping system with superior operational...
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The Commonwealth Group

The Commonwealth Group is the industry’s newest, 100-percent member owned, $8.5...
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Victaulic is the world's leading manufacturer of mechanical pipe joining products. For over 80...
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Founded in 1899, Viega manufactures and distributes the highest quality plumbing, heating and...
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Watts Water Technologies

Watts Water Technologies  designs and manufactures valves and related fluid handling...
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WinWholesale, Inc. is comprised of over 525 wholesale distribution locations. Along with Noland...
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