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What is Butterfly Valve?

Posted by Bundor valve
The butterfly valve is an improved type of valve which can be used for control of  liquid, gas or particulate, viscous fluids with a simple, storable and compact structure. These types of valves give opportunity for more economical control of fluids with zero sealing. Butterfly valves are classified as “quarter-turn” valves.

The metal disc, which is part of the valve design, opens or closes when it is turned a quarter turn. The disc called “Butterfly ır connects to a stick. When the butterfly valve is opened, the disc rotates (1/4 turn) to allow the fluid to pass almost indefinitely. You can slowly open the valve to reduce flow. By turning the throttle (disc) to close the valve, the passage of the liquid is prevented.

This is due to the fact that the disc is always perpendicular to or parallel to the flow, which results in a pressure drop regardless of its position. Lug Butterfly Valves: The lug version of the butterfly valve design is similar to a 3-piece ball valve. Because one end of the line can be removed without creating an effect on the opposite side. This can be done using studs and flanges since each flange has its own bolts. The most important advantage of these butterfly valves; This means that you do not need to shut down the entire system for cleaning, inspecting, repairing or replacing the valve.

Wafer Butterfly Valves:The function of a wafer butterfly valve is to provide sealing against bi-directional pressure difference in the fluid flow. In other words, in order to avoid any backflow in systems produced for one-way flow, the wafer version of the butterfly valves is designed to protect against a tight seal and two-way pressure difference. This is achieved by the precision-machined flat flange surfaces and a tightly seated gasket and a precision disc in the gasket.