Different Types of Globe Valves

Valves are known as simple devices used to control the flow of liquid by blocking the passage of a pipe. Valves are found in one’s home’s plumbing system, and in any places where flow of liquids is required.
Valves are categorized in Two Types :- 

1. Stop Valves that gives an on-off or fractional on setting,
2. Check Valves that stops the flow of liquid in only one direction.

A globe valve belongs to the top valve family. Its body is rounded and is made up of two distinct valves isolated by a disc for opening and closing. Unlike the other valves this kind of valve is more complex because it is made up of a bonnet, plug, stem, cage and seat ring.

Angle Globe Valve

Globe valves consist of a baffle that splits the inner portion of a pipe, along the pipe’s length. The opening of the baffle is vacuum-packed by using a flat plug or a disc which is pushed down in the opening parallel to the pipe to break the flow inside. Outside of the pipe, a structure called as bonnet holds a stem that is attached to a disc. The upper part of the bonnet poses a hand wheel used by it to screw down the disc including the stem till the disc seals itself touching the seat opening.

Globe Valve

These apparatus are sometimes called throttle valves, for they can limit the flow inside a pipe, and include various types like Angle Globe Valves, Pressure Globe Valve, Forged Globe Valve, Fabricated Globe Valve etc.

Forged Globe Valve

Even when globe valves are fully open, they provide a considerable restriction to the flow through them. For this reason these valves often need to be sized on the basis of orifice size for the minimum diameter of the seat in addition to the pipe’s size. In simple way, a valve that fits into a certain pipe may not allow sufficient flow in some application if it does not have an enough large orifice.

Globe Stop Valve

Globe valves are not very good for regulating flow. They perform best when they are fully open or fully closed, and cannot let a regulated flow consistently when they are partially open. This happens because of the resilience of the washer and also of the fact that adjustment of stem is not designed in well-calculative way. Marketing of these valves now largely depends on online advertisement and some good manufacturers are there to provide good globe valves.