Globe valve and gate valve are often compared and analyzed. Different product characteristics have achieved different application scopes. The difference between them is mainly compared and analyzed from the structure and tightness.
The structure of the globe valve is that the handwheel rotates with the valve stem to do the opening and closing movement, and the structure of the gate valve is that the handwheel is rotated, and the valve stem does the lifting movement. The flow rate is different, the gate valve requires a fully open or fully closed state, and the globe valve does not. The globe valve in the Yuhuan copper valve has flow direction requirements, while the gate valve has no import and export requirements. The length of the gate valve is shorter than that of the globe valve, and the height is higher than that of the globe valve. The installation of the rising stem gate valve should pay attention to the height. The gate valve can be tightly closed with the sealing surface by the medium pressure, so as to achieve the effect of no leakage. When opening and closing, the valve core and valve seat sealing surfaces are always in contact and rub against 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 rear of the pipeline is large, which makes the sealing surface wear more seriously.
In the actual purchase and consumption process, an effective selection should be made according to the different scope of application. For example, globe valves are generally used in small pipelines and those requiring better sealing performance; in steam systems and large-diameter pipelines, gate valves are suitable due to their small fluid resistance.
