A butter y valve is a valve which can be used for isolating or regulating ow. The closing mechanism takes the form of a disk. Operation is similar to that of a ball valve, which allows for quick shut off. Butter y valves are generally favored because they are lower in cost to other valve designs as well as being lighter in weight, meaning less support is required. The disc is positioned in the center of the pipe, passing through the disc is a rod connected to an actuator on the outside of the valve. Rotating the actuator turns the disc either parallel or perpendicular to the ow. Unlike a ball valve, the disc is always present within the ow, therefore a pressure drop is always induced in the ow, regardless of valve position.
A butter y valve is from a family of valves called quarter-turn valves. The “butter y” is a metal disc mounted on a rod. When the valve is closed, the disc is turned so that it completely blocks off the passageway. When the valve is fully open, the disc is rotated a quarter turn so that it allows an almost unrestricted passage of the uid. The valve may also be opened incrementally to throttle ow.
Enquiry Now