The difference between globe valve and ball valve, gate valve

Globe valve working principle:

Assuming that there is a water supply pipe with a cover, the water is injected from the bottom of the pipe, discharged to the pipe mouth orientation, the cover of the outlet pipe is equivalent to the shut-off valve closure, if the hand is lifted up to the pipe cover, the water will be discharged outward, and the water will be terminated by the hand to cover the pipe cover, the water will terminate the swimming, which is equivalent to the principle of the globe valve.

The characteristics of globe valve:

① Simple structure, high tightness;

② Manufacturing and maintenance is convenient;

③ Water friction resistance;

③ Water friction resistance; 

④ Can control the flow;

⑤ Installation, low into the high, there is directional;

⑥ Specifically used in hot and cold water supply and high pressure steam pipeline, not suitable for solvents with particles and high viscosity. 

Working principle of ball valve:

When the ball valve rotates 90 degrees, the inlet and outlet should all show the spherical surface, thus closing the valve and disconnecting the solvent movement. When the ball valve turns 90 degrees, in the inlet and outlet should all show the ball mouth, and then open the swimming, and basically no flow resistance.

The characteristics of the ball valve:

Ball valve is very convenient to use, fast, save energy, usually if the valve handle to turn 90 degrees can be, and the ball valve can be used to less pure (containing solid particles) on the fluid because of its ball spool in the opening and closing of the fluid to do is cut movement.

Gate valve working principle:

Gate valve, also called gate valve, is a commonly used valve. Its working principle is the gate sealing surface and the valve seat sealing surface height smooth, leveling to keep consistent, fit each other, can block the medium liquid flow away, and with the help of the spring or the physical model of the gate to improve the sealing of the actual effect. Gate valve in the pipeline first and foremost to disconnect the effectiveness of liquid flow.

The characteristics of the gate valve:

① Sealing performance is better than the globe valve, fluid friction resistance is small;

② Open and close more energy-saving, full open sealing surface by solvent erosion, not subject to the material flow direction, with double flow direction;

③ Construction length is small, wide range of applications;

④ High size, enable the need for a certain space, open and close the long interval between the sealing surface is very easy to open and close the sealing surface erosion and cuts, the two sealing vice to the production processing and overhaul problems.

Globe valve and ball valves, gate valve difference summary:

① Ball valves and gate valves are usually used to control the fluid switching and disconnecting, usually can not be used to adjust the flow, while the globe valve can be used to control the fluid switching and disconnecting can also be used to adjust the flow.

② When you need to adjust the flow after the use of globe valves is more appropriate.

③ Control switching and disconnecting the application of economic considerations on the use of gate valves, gate valves are much cheaper.

④ Or in large diameter, low pressure oil, steam, water pipeline using gate valves.

⑤ Considering the sealing on the use of ball valves, ball valves can be used for the conditions of leakage level standard high, suitable for rapid enabling the closure of the safety performance of life is better than the gate valve.

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