Brass Ball Valve With Butterfly Valve

The butterfly valve is typically operated by a handwheel, crank, or lever. The smaller manual valves are manually operated by a lever, while larger handwheels are equipped with a gearbox that transmits torque mechanically. In buried applications, manual actuation is available as an alternative to an actuator. This type of valve is lighter and requires less support than other valve designs. The actuator can be operated using a T-key or by a cable.


The butterfly valve has a stem that lifts from the downstream side. The horizontal stem allows debris to be swept clear. Solids can get lodged under the spindle and damage the seal. Discs with a flat bottom should lift up and away from solids on the upstream side. A butterfly valve is not designed for pigging. Pigging is the process of using devices called "pigs" to open and close a valve.



In addition to manual actuation, a butterfly valve can be automated. A gearbox reduces operational torque and simplifies the valve. But at the cost of speed. The simplicity of the design and low manufacturing cost make the butterfly valve an attractive option for a wide range of applications. Unlike many other types of valves, a butterfly valve can be installed underground. A typical installation can accommodate two to five gallons of liquid per minute, making it a popular choice for the most difficult-to-access locations.


The Butterfly valve has a symmetrical stem, which can be used to control the flow of gas or liquid. The butterfly valve stem is positioned to allow the rotating disc to rub the seat for one to three degrees. The disc can be asymmetrical depending on the actuation style, so it can be easily moved between pipes. In addition to allowing flow in either direction, this type of Butterfly valve also allows for pressure balancing.


The butterfly valve has a unique design that allows for more flexibility. The disk of the butterfly valve is shaped to fit the stem, and the stem fits between the two pipes. The disk is held in place by bolts, which are inserted through holes in the outer casing. A symmetrical design of the butterfly valve also makes the Butterfly valve more durable and requires less maintenance than other types. The body of the Butterfly valve is positioned between two flanges.