Globe valves are linear motion valves that are widely employed to stop, start and throttle flow. In this article, we will have a simple introduction about globe valve function, advantages and disadvantages, and common applications of globe valves.
Globe valves are designed with a stem that moves up and down to regulate flow inside the valve, a disc (ball, composition, or plug) and seat, which is generally screwed into the valve body. Seats are designed in plane parallel or inclined to the line of the flow. These types of modulating valves are most commonly used to valve throttle, open or close flow in a system. The three basic globe valve body designs are Wye, Tee and Angle.
Advantages and Disadvantages of Globe Valves
Advantages:
- Good shutoff capability.
- Moderate to good valve throttling capability.
- Shorter stroke (compared to a gate valve).
- Easy to machine or resurface the seats.
- Can be used as a stop-check valve.
Disadvantages:
- Higher pressure drop (compared to a gate valve).
- Requires greater force or a larger actuator to seat the valve.
Typical Globe Valve Applications
The following are some of the typical applications of globe valves:
- Cooling water systems.
- Fuel oil systems.
- Feedwater or chemical feed systems.
- Boiler and main steam vents and drains.
- Turbine lube oil system and others.
NICO Valves Corp. is a leading industrial valve manufacturer in Taiwan and China and has been exporting this line of products for more than 20 years to all over the world.
We have full qualification for manufacturing widest kind of industrial valves in all common sizes & customized sizes, and available in ANSI, JIS, DIN standards. Its products includes: Gate, Globe, Check, Ball Valve, Knife Gate Valve, and Y-strainer. If you need more information about globe valves and other industrial valve series, welcome to browse NICO’s website or contact with us directly for further details!
Article Source: http://www.bmengineering.co.uk/news/globe-valves/what-is-a-globe-valve-and-where-are-they-used