Hydraulic Counterweight Butterfly Valve is a valve which can be used for isolating or regulating flow. The closing mechanism takes the form of a disk. Operation is comparable to that of a ball valve, that permits for fast shut off. Hydraulic Counterweight Butterfly Valves are typically favored as a result of they're lower in price to alternative valve styles additionally as being lighter in weight, that means less support is needed. The disc is positioned within the center of the pipe, passing through the disc is a rod connected to an mechanism on the surface of the valve. Rotating the actuator turns the disc either parallel or perpendicular to the flow. Not like a ball valve, the disc is often present inside the flow, thus a pressure drop is often evoked within the flow, in spite of valve position.
Hydraulic Counterweight Butterfly Valve is from a family of valves referred to as quarter-turn valves. The "butterfly" is a metal disc mounted on a rod. once the valve is closed, the disc is turned in order that it fully blocks off the passageway. once the valve is absolutely open, the disc is turned 1 / 4 flip in order that it permits a nearly unrestricted passage of the fluid. The valve may be opened incrementally to throttle flow. There area unit totally different varieties of Hydraulic Counterweight Butterfly Valves, every custom-made {for totally different|for various} pressures and different usage. The resilient valve, that uses the pliability of rubber, has all-time low pressure rating. The high performance valve, utilized in slightly higher-pressure systems, options a small offset within the method the disc is positioned, that will increase the valve's waterproofing ability and reduces its tendency to wear. The valve best fitted to aggressive systems is that the triple offset valve, that makes use of a metal seat,[clarification needed] and is thus able to stand up to a bigger quantity of pressure.
