A Globe Valve is a type of gate valve that uses a disc to control flow
Posted by Admin | 16 Jan
A Globe Valve is a type of gate valve that uses a disc to control flow. The disc, which may be a ball or composition, moves up and down within the valve body. The seat on a Globe Valve is usually screwed into the valve body. There are different types of seats available for different applications. The union type has a stronger construction, and screw-in bonnets offer a tighter seal.
The design of a globe valve is characterized by the two changes in flow direction. This causes a drop in pressure and resistance in the liquid line. The flow of fluid is obstructed when the disk is installed against the flow direction. When the disc is in the flow direction, it helps close the valve, while the fluid's kinetic energy obstructs it from closing. Therefore, when using a Globe Valve, it is important to install the valve properly to prevent debris from accumulating above the disc.
A Globe Valve is an excellent candidate for automation. The actuators can be either pneumatic or electrical and can act directly on the valve disc or stem. Tameson's monthly newsletter is easy to read and contains pertinent information. Technical articles, new product announcements, special pricing, and industry news are all included. If you would like to learn more about Globe Valves, consider subscribing to their newsletter. They have a wealth of information to share with you.
The flow resistance of a Globe Valve is 20 percent of the maximum pressure in the upstream direction. In some cases, this amount may be lower than the maximum differential pressure. If the differential pressure is higher, special trim may be required. Globe valves can be divided into three types: Angle, Tee, and Wye Pattern. When selecting a Globe valve, remember to check the maximum differential pressure of the valve and how much pressure is needed to operate it.
The seating surface on a Globe Valve is ground so that the valve disc has full bearing surface contact when it is closed. A long disc locknut and disc guides inside the valve body help keep the disc aligned. The disc is also designed to rotate freely on the stem to minimize the risk of galling. The stem also bears against a hardened thrust plate. Globe valves are typically installed with pressure underneath the disc. This allows easy operation and protects the packing.
Angle Pattern Globe valves are variations of the Tee Pattern Globe valve. The disk and stem are angled at an angle, 90 degrees. A single 90-degree turn causes the fluid to flow through. The angle pattern of a Globe valve is slightly lower than that of a wye-pattern globe valve. Therefore, Angle Pattern Globe valves are commonly used for applications that experience periods of pulsating flow. They can handle the slugging effect as well.
A Globe Valve has five main parts. The inlet and outlet of the valve contain the media. The bonnet protects the threaded components, while the handwheel turns the stem, which raises the plug and closes the orifice. A multi-turn globe valve requires several turns to open or close. This is because it is designed to be opened and closed several times. But the process can be complicated. This article will explain how a Globe Valve works and what to look for.