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The Difference Between Globe Valve and Ball Valve

There are five main differences between globe valves and ball valves. China Cast Iron Globe Valve supplier will share with you:

First. Different definitions:

  
1. The shut-off valve, also known as the gate valve, is a force-sealed valve, so when the valve is closed, pressure must be applied to the clapper to force the sealing surface to not leak.   
2. The ball valve is a valve whose opening and closing parts (balls) are driven by the stem and rotates around the axis of the ball valve.

Second, the working principle is different:

  
1. When the medium of the shut-off valve enters the valve from the bottom of the valve flap, the resistance that the operating force needs to overcome is the friction force of the stem and the filler and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve , So the diameter of the valve stem should be large, otherwise the failure to bend the valve stem will occur.   
2. The ball valve can be used for fluid adjustment and control. Among them, the hard-sealed V-type ball valve has a strong shear force between the V-shaped core and the metal seat of the surfacing cemented carbide, and is particularly suitable for fibers and tiny solids. Media such as pellets. The multi-way ball valve can not only flexibly control the merge, divert, and flow direction of the medium on the pipeline, but also can close any channel and connect the other two channels. This type of valve should generally be installed horizontally in the pipeline.

China Famous Globe Valve

Third. Different applications:  

 
1. As one of the most important shut-off valves, China Famous Globe Valve plays an important role in the aerospace field. As an important component of aerospace equipment, the shut-off valve realizes the functions of medium transportation, cut-off, and adjustment. Its sealing performance directly affects the safe and reliable operation of the aerospace equipment. Studying the influencing factors and influencing laws of the sealing characteristics of typical globe valves has a guiding significance for the structural design of the valve sealing pair, thereby improving the sealing performance and reliability of the valve.   
2. Ball valves are widely used in petroleum refining, long-distance pipelines, chemical industry, papermaking, pharmaceuticals, water conservancy, electric power, municipal administration, steel and other industries, occupying a pivotal position in the economy. It has the action of rotating 90 degrees, the cock body is a sphere, with a circular through hole or channel passing through its axis.

Fourth, the classification is different:

  
1. Globe valves can be divided into straight-through globe valves, DC globe valves, angle globe valves, and plunger globe valves according to the channel direction. According to the use, it can be divided into: fluorine lined globe valve, needle valve, low temperature globe valve, plunger valve, thermal insulation jacket globe valve, forged steel globe valve, oxygen special globe valve, bellows globe valve, etc.   
2. Ball valves are divided into bypass valves, air valves, pressure relief valves, and sewage valves according to their functions.   
According to the transmission classification, it is divided into pneumatic ball valves, electric ball valves, hydraulic ball valves, gas-hydraulic ball valves, electro-hydraulic ball valves, and turbine transmission ball valves.   
According to the classification characteristics, it is divided into floating ball valves, fixed ball valves, orbit ball valves, V-type ball valves, three-way ball valves, stainless steel ball valves, cast steel ball valves, forged steel ball valves, ash unloading ball valves, anti-sulfur ball valves, pneumatic ball valves, electric ball valves, cards Set of ball valves, welded ball valves, etc.

Fifth. Other aspects:


Globe Valve Vs Ball Valve   
Shut-off valve:
1. Double seal design (bellows + packing) If the bellows fails, the stem packing will also be avoided;   
2. External leakage and comply with international sealing standards;   
3. No fluid loss, reduce energy loss and improve plant equipment safety;   
4. Long service life, reduce the number of repairs and reduce operating costs;   
5. Rugged and durable bellows seal design ensures zero leakage of the valve stem and provides maintenance-free conditions.
6. The bellows seal globe valve adopts the bellows seal design, which completely eliminates the shortcomings of ordinary valve stem packing seal aging and easy leakage, which not only improves the use of energy efficiency, increases the safety of production equipment, reduces maintenance costs and frequent Maintenance, also provides a clean and safe working environment.  
Ball valve   
The fluid resistance is small, and the resistance coefficient is equal to that of the pipe section of the same length.  
Simple structure, small size and light weight.  
It is tight and reliable, and the sealing surface material of the ball valve is widely used with plastic and has good sealing performance. It has also been widely used in vacuum systems.  
It is easy to operate and quick to open and close. It only needs to rotate 90° from fully open to fully closed to facilitate remote control.  
The maintenance is convenient, the structure of the ball valve is simple, the sealing ring is generally movable, and the disassembly and replacement are more convenient.  
It has a wide range of applications, with diameters ranging from a few millimeters to a few meters. High vacuum or high pressure can be applied.

 

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