Valve Butterfly
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
ANVIL International
- ANVIL International offers a full line of domestically produced iron fittings, steel nipples,...
(click for details) Apollo Valves
- Apollo Valves has been the global leader in valve innovation for over 75 years. We are dedicated...
(click for details) Embassy Group LTD
- Embassy Group Ltd. is a 100 percent member-owned, 3.2 billion dollar corporation consisting of...
(click for details) F.W. Webb Company
- F.W. Webb Company is a multi-faceted distributor of Plumbing and Heating, HVAC and Controls,...
(click for details) Ferguson
- Ferguson specializes in plumbing and heating, industrial pipe, valves, fittings, underground...
(click for details) Johnson Controls, Inc.
- Johnson Controls manufactures, installs, integrates, services and operates systems that manage...
(click for details) Metraflex Company
- Metraflex is a manufacturer and marketer of the "PoopLoop" and magic "Quite...
(click for details) Milwaukee Valve Company, Inc.
- Serving the mechanical contractor since 1901, Milwaukee Valve produces the highest quality gate,...
(click for details) Mueller Industries, Inc.
- Mueller Industries is the leading U.S. manufacturer of copper tube, copper fittings, and plastic...
(click for details) NIBCO INC.
- Founded in Elkhart, Indiana in 1904, NIBCO INC. is a leading provider of a diverse range of flow...
(click for details) Tyco/GRINNELL Mechanical Products
- Tyco Fire & Building Products manufactures the Grinnell® line of grooved products...
(click for details) Unique Fittings and Flanges
- Unique Fittings and Flanges and its parent company Unique Industrial Product Co., supply quality...
(click for details) Victaulic
- Victaulic is the world's leading manufacturer of mechanical pipe joining products. For over 80...
(click for details) Viega LLC
- Founded in 1899, Viega is the only manufacturer to offer press fitting solutions in multiple...
(click for details) Watts
- Watts Regulator Company provides maximum value for your money and exceeds your needs by...
(click for details) WinWholesale, Inc.
- WinWholesale is comprised of over 550 wholesale distribution locations that sell high-quality...
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