There are many different types of valves which are used in daily routine of industrial companies which helps to regulate the flow of fluid or gases. This can give you an idea of how the various valve types differ in their operations, as well as a clear understanding of the variations between them. Through it, one can determine the right type of valve to use while designing a system as well as choose which valve to use when operating a system.
Some of the types of valves used in instrumentation:
- Gate Instrumentation valves use a wheel and a screwed stem to take care of the movement of the disc-shaped gates. If a completely open valve is required to have a low flow resistance, Gate valves are frequently used. A fully open or fully closed system is designed for them.
- In globe valves, the plug has a convex shape that rises and falls into a circular seat around the globe-shaped body through a rising stem. Due to the S-shaped conduit, the fluid flow through the globe valve changes direction twice, resulting in a greater pressure drop.
- Needles and globe valves differ primarily in these ways: Precision flow control is the purpose of these smaller-sized valves. As part of their design, a needle was used instead of a disc-shaped plug with a conical shape that would slide into and out of the hole.
- The plug valve was constructed with a tapered cylinder-shaped obstruction. Activating the stopper valve is also accomplished by turning the lever 90 degrees.
- A butterfly valve is characterized by a spherical obstructer and is among the most commonly used valves. The body and disc of the valve are both sealed by a single seal ring, as are the pipe flanges and the valve body.
- The disk check valve keeps the flow in the pipe from reversing. Check valves stay open as long as fluid flows, but they close when gravity or flow reversal occurs. By maintaining fluid flow, check valves remain open, while by gravity or reverse flow they become closed.
- Ball valves consist of two seals in the shape of cups where a ball-shaped obstruction is trapped. Fully open or fully closed, these valves can be operated in either direction. They are often used to shut off or isolate a system.