The Difference Between Globe and Gate Valves

1. The structure

Installation space is limited when the selection should be noted. Gate valves can be tightly closed with a sealing surface depending on the pressure of the medium to achieve a non-leakage effect. When opening and closing, the spool and seat sealing surface are always in contact and friction with each other, so the sealing surface is easy to wear. When the gate valve is close to closing, the pressure difference between the front and back of the pipeline is large, which makes the sealing surface wear more serious.

Gate valve structure will be more complex than globe valve, from the appearance, in the same aperture, gate valve higher than the stop valve, the stop valve longer than gate valve. In addition, the gate valve has the bright rod and the dark rod. No globe valve.

2. Working principle

When the globe valve is opened and closed, it is an ascending valve stem type, that is to say, rotating handwheel, handwheel will follow the stem to do rotation and lifting movements. And gate valve is to rotate the hand wheel, so that the valve stem to do lifting movement, the hand wheel itself position remains unchanged. Flow varies, gate valves are required to be fully open or closed, and globe valves are not required. The globe valve has the direction of entrance and exit. Gate valve has no inlet/outlet direction requirement.

In addition, gate valves are only fully open or fully closed. Gate opening and closing travel is large and takes a long time. The valve plate movement stroke of the globe valve is much smaller, and the valve plate of the globe valve can stop at a certain place in the movement, do flow regulation to use. Gate valves can only be used for truncation and have no other functions.

3. Performance differences

Globe valve which are provided by Globe valve supplier can be cut off to use, can be used for flow regulation. The flow resistance of the globe valve is relatively high, which makes it more laborious to open and close the valve. However, due to the short distance between the valve plate and the sealing cover, the opening and closing stroke is short.

Gate valve can only be fully open and fully closed. When it is fully open, medium flow resistance in valve body channel is almost 0. Therefore, gate valve's opening and closing is very labor-saving.

Besides these, they are also different in other aspects. If you want to know more details, you can contact us!