Differences between Gate, Globe, Ball and Butterfly Valves. 

GLV

BV

BTV

 

From left to right: Gate valve, Globe valve, Ball valve, Butterfly valve

Gate Valve is commonly used for open/close purposes only and cannot regulate flow. It has a built-in wheel for manual open/close which can be done by multiple 360 degrees turns. This results in slow opening and closing speed which can eliminate the water hammer effect. It is commonly used in the older plumbing systems that do not require frequent shut off as well as large water supply lines. 

Globe Valve can regulate the flow of gas or liquid unlike gate valves. It has a greater pressure drop compared to other valves due to its non-linear inner structure. The built-in wheel for the globe valve indicates that it will have slower closing compare to ball and butterfly valves. It is used in steam applications where the valve must be welded into the system so that no leaks are allowed.

Ball Valve is commonly used for open/close purposes only and cannot regulate flow. It has a built-in handle for manual open/close which can be done by a 90 degrees turn. This results in super-fast opening and closing for the valve which can lead to water hammer effect. It is commonly used in newer plumbing systems that require frequent shut off.

Butterfly Valve is used for open, close and regulation purposes. It has a disc mounted on a rotating rod. It requires only a 90 degrees turn to be fully opened/closed . This shows that it can be operated quickly. It is widely used in water, steam applications and corrosive liquids at low temperature and pressure.

Type of Valve  Gate Valve  Globe Valve Ball Valve  Butterfly Valve 

Function 

-For on/ off application

-Cannot control the flowrate

-For Liquids only

-For regulating purpose

-Control valve & shut-off valve functions

-For Liquids and Gases

-For on/ off application

-Cannot control the flowrate

-For Liquids and Gases

 

-For regulating purpose

-Control valve & shut-off valve functions

-For Liquids and Gases

Application 

-Not frequent on/off operation

-Applications in water treatment plants, clean water supply and building services  

-Precise flowrate for clean fluids and gases is needed

 -Applications in cooling water systems, chemical feed, main steam vents and fuel oil industry.

-Need frequent on/off operation

 - Residential, Commercial, Industrial applications (eg. Chemical manufacturing, Water supply, Oil and gas industry)

-Water and steam applications

 -Compressed air or gas applications

(eg. Gas refinery pipeline)

 -Slurry applications

Advantages 

-Minimum pressure loss when fully open

-Tight sealing when fully closed

-Can be use in both directions

-Better sealing than gate valve

 -Excellent flow control

-Can operate quickly with shorter stroke than gate valve

-Very easy to operate

 - Available in multi-port design

 - Can operate quickly

-Can operate quickly

-Low pressure drops

-Good flow control

-Can deal with slurries and high-volume water applications

Disadvantages 

-Cannot deal with slurries/ viscous fluids

-Cannot operate quickly

-Higher pressure drop than gate valve

-Potentially require more maintenance (compare to gate valve)

-Not suitable for slurries / solid matters

 -Not able to control flowrate

-Pipeline with butterfly valve is unable for cleaning using scrapers (pigging)

 -Poor sealing ability