Working principle of globe valves

Assuming there is a water supply pipeline with a cover, water is injected from the bottom of the pipeline and discharged towards the direction of the pipe mouth, and the cover of the outlet pipe mouth is equivalent to the closing part of the globe valve. If you lift the pipe cover up with your hand, the water will be discharged outward. If you cover the pipe cover with your hand, the water will stop swimming, which is equivalent to the principle of a globe valve.

Characteristics of globe valves

Simple structure, high tightness, convenient production and maintenance, high water friction resistance, and flow control; When installing, it is usually low in and high out, with directional orientation; Specifically used in cold and hot water supply and high-pressure steam pipelines, it is not suitable for solvents with particulate matter and high viscosity.

Working principle of ball valves

When the ball valve rotates 90 degrees, both the inlet and outlet should show spherical surfaces, and then close the valve to disconnect the solvent flow. When the ball valve rotates 90 degrees, it should all show the ball mouth at the entrance and intersection, and then open for swimming with minimal resistance.

Characteristics of ball valves

Ball valves are very convenient, fast, and labor-saving, usually by turning the valve handle 90 degrees. And ball valves can be used on fluids that are not very pure (containing solid particles). Because its spherical valve core performs a cutting motion on the fluid during opening and closing.

Working principle of gate valves

Gate valve is a widely used valve. Its closing working principle is that the sealing surface of the gate and the valve seat are highly smooth, leveled and consistent, and fit together, which can block the flow of medium and liquid. And use solid models of springs or gates to improve the actual sealing effect. Gate valves primarily serve to disconnect liquid flow in pipelines.

Characteristics of gate valves

The sealing performance is better than globe valve. Low frictional resistance of fluid. Opening and closing are more energy-efficient. When fully open, the sealing surface is less susceptible to solvent erosion. Not limited by the direction of material flow. Equipped with dual flow direction. The length of the structure is relatively small. Widely applied in various fields.

Summary of Differences

Ball and gate valves are usually used to control and cut off fluid flow, but cannot be used for flow regulation. And the globe valve can be used not only for fluid control switches and cutoff, but also for flow adjustment.

1. When you need to adjust the flow rate, using a globe valve is more suitable.

2. When controlling switches and interruptions, considering the economy of the application, gate valves are used, which are much cheaper. Alternatively, gate valves can be used on large-diameter, low-pressure oil, steam, and water pipelines.

3. Considering the sealing performance, ball valves are used. Ball valves can be used for high leakage standards and quick opening and closing conditions. Better safety performance and lifespan than gate valves.