We are one of the leading manufacturer, exporter and supplier of best quality Butterfly Valves in India Mumbai. Operation is like that of a ball valve, which allows for quick shut off. Butterfly valves are generally favored because they cost less than other valve designs, and are lighter weight so they need less support. The disk is place in the center of the pipe. A rod passes through the disk to an actuators on the outside of the valve. Rotating the actuators turns the disk either parallel or perpendicular to the flow. Unlike a ball valve, the disk is always present within the flow, so it induces a pressure drop, even when open. A butterfly valve is from a family of valves called quarter-turn valves. In operation, the valve is fully open or closed when the disk is rotate a quarter turn.There are different kinds of butterfly valves, each adapted for different pressures and different usage. The zero-offset butterfly valve, which has rubber elasticity, has a low pressure rating. The Butterfly Valves are often used in power plants and dams. They have various applications the most common of which are:
Penstock Protection: the valve acts as both a safety and maintenance device for the penstock. As a rule valves used in this type of application is characters by large diameters.
Turbine Protection: the valve acts as both a safety and maintenance device for the turbine. Usually the valves used in this type of application is characters by high water pressures.
Water Discharge Line: the valve acts as both a safety and maintenance device for the upstream discharge.
Water Intake: the valve is employ to open/close the intake lines of the intake tower
Butterfly valves have been manufacture with extensive application, design and manufacturing ability. These product is produce by employing modern manufacturing practices under a robust quality assurance system. These practices make sure consistent product quality and dependable performance. A butterfly valve is a valve that isolates or regulates the flow of a fluid. The closing mechanism is a disk that rotates. Operation is like that of a ball valve, which allows for quick shut off. Butterfly valves are generally favored because they cost less than other valve designs, and are lighter weight so they need less support. The disc positioned in the center of the pipe. A rod passes through the disc to an actuators on the outside of the valve. Rotating the actuators turns the disc either parallel or perpendicular to the flow. Unlike a ball valve, the disc is always present within the flow, so it induces a pressure drop, even when open. A butterfly valve is from a family of valves called quarter-turn valves. In operation, the valve is fully open or closed when the disc is rotate a quarter turn. The "butterfly" is a metal disc mounted on a rod. When the valve is close, the disc turned so that it completely blocks off the passageway. When the valve is fully open, the disc is rotate a quarter turn so that it allows an almost unrestricted passage of the fluid. The valve may also be opened incrementally to throttle flow. There are different kinds of butterfly valves, each adapted for different pressures and different usage.
The zero-offset butterfly valve, which uses flexibility of rubber, has the lowest pressure rating. The high-performance double offset butterfly valve, used in slightly higher-pressure systems, is offset from the centre line of the disc seat and body seal(offset one), and the centre line of the bore (offset two). This creates a cam action during operation to lift the seat out of the seal resulting in less friction than is create in the zero offset design and decreases its tendency to wear. The valve best suited for high-pressure systems is the triple offset butterfly valve. In this valve the disc seat contact axis is offset, which acts to virtually eliminate sliding contact between disc and seat. In the case of triple offset valves the seat is produce of metal so that it can machined such as to do a bubble tight shut-off when in contact with the disc.
Ideal for precision throttling and on-off applications, especially in lighter-weight piping systems, the Flow serve family of butterfly valves is often specified for its versatility. Outstanding throttling accuracy for process control is make through low-friction, erosion resistant seal off surfaces with very low operating torques. A broad range of applications can met via metal and soft-seated designs as well as lined versions for corrosive and hygienic applications. The butterfly valve can centric or eccentric. On a centric (concentric) butterfly valve the stem is center in the middle of the disc and the disc centered in the bore. The eccentric butterfly valve has one or more stems (stub shafts) located offset from the center according to the categories of single, double and triple offset valves.
