How to Distinguish the Globe Valve and Gate Valve
As two essential types of valve in industrial and civil pipeline systems, globe valves and gate valves both play a crucial role in controlling the flow of fluids. However, they have their own characteristics in regards of structure, operating principle, and applicable scenarios. Analysis of the similarities and differences between the two will provide us with a more informed choice in practical operations.
Gate valve vs globe valve
Structural differences
Globe Valve: Its core component is the disc. The opening and closing are controlled by the up-and-down movement of the valve stem. The main components include the valve body, valve disc, valve stem, and handwheel.
Gate Valve: The valve is also opened and closed by the up-and-down movement of the gate. Howerver when the gate is opened, it completely withdraws from the fluid passage; when it is closed, it fits closely with the valve seat. Its structure consists of the valve body, gate, valve stem, and handwheel.
Operating principles
Globe Valve: It controls the flow through the linear movement of the valve disc and has the ability to throttle the flow. The flow changes its direction inside the valve, and the sealing surface is in conical contact to ensure good sealing performance.
Gate Valve: The flow direction of the fluid remains unchanged when passing through the valve, so it is not suitable for flow regulation. Its sealing surface is the planar contact between the gate and the valve seat, and relatively speaking, the sealing performance is slightly lower.
Application Scenarios
Globe Valve: It is suitable for occasions where precise flow control is required, such as in pipeline systems that are frequently opened and closed or require flow regulation. Its excellent sealing performance makes it suitable for environments with high pressure, high temperature, and corrosive media.
Gate Valve: It is suitable for occasions require fully open or fully closed , such as pipeline systems that are not frequently operated. Its low flow resistance characteristic makes it suitable for large-diameter and large-flow pipeline systems.
Advantages and disadvantages
Globe Valve: The advantages include good sealing performance and strong regulating performance; however, it has a relatively large flow resistance, and the opening and closing torque is also quite large.
Gate Valve: The advantages lie in its low flow resistance and easy opening and closing torque; but it should be noted that its sealing performance is relatively poor, and it is not suitable for flow regulation.
In conclusion, globe valves and gate valves have their own advantages and characteristics comparing in structure, operating principle, and applicable scenarios. When making a choice, it is necessary to consider specific working conditions and operation requirements.
