Globe valve vs gate valve: Globe valve and gate valve are two of the most common types of valves used in industrial applications. They are both used to control the flow of fluids, but they have different designs and are suited for different applications.
globe valve vs gate valve
Shape: Globe valve has a spherical body, while gate valves have a cylindrical body. This difference in shape affects the way that the valves control the flow of fluids.
Flow control: Globe valve is good for throttling, which means that they can be used to precisely control the amount of fluid that is flowing through a line. Gate valves are not good for throttling, and they are typically used for on/off applications.
Pressure drop: Globe valve create a higher pressure drop than gate valves. This means that there is a loss of pressure as the fluid flows through the valve. Gate valves create a lower pressure drop, which makes them a better choice for applications where the pressure of the fluid needs to be carefully controlled.
Directionality: Globe valve is unidirectional, which means that they can only be used to control the flow of fluids in one direction. Gate valves are bidirectional, which means that they can be used to control the flow of fluids in both directions.
Applications: Globe valve is typically used for applications where precise flow control or pressure regulation is required. Gate valves are typically used for applications where on/off control is required.
Stem: Globe valve has a rising stem, while gate valves have a non-rising stem. This means that the stem of a globe valve moves up and down as the valve is opened and closed, while the stem of a gate valve does not move.
Packing: Globe valves typically use packing to seal the stem, while gate valves typically use a wedge or a disc to seal the stem.
Materials: Globe valves can be made from a variety of materials, including steel, brass, and stainless steel. Gate valves are typically made from steel or cast iron.
Maintenance: Globe valves require more maintenance than gate valves. This is because the packing in a globe valve can wear out over time and need to be replaced.
Additional considerations when choosing between globe valve vs gate valve
Cost: Globe valve is typically more expensive than gate valves.
Maintenance: Globe valve is typically more difficult to maintain than gate valves.
Durability: Globe valve is typically more durable than gate valves.
Examples of where globe valve and gate valve are typically used
- Boiler feedwater control valves
- Steam traps
- Steam pressure regulators
- Mixing and blending applications
- On/off control of pipelines
- Isolation of sections of pipelines
- Emergency shutoff valves
Above is the Globe valve vs gate valve difference. The selection of these valves are purely on the basis of process requirement and suit the favorable condition.