What is the difference between pressure gauge stop valve and gate valve

What is the difference between pressure gauge stop valve and gate valve
Globe valve, gate valve, butterfly valve, check valve and ball valve are indispensable control components in various pipeline systems. Each kind of valve is different in appearance, structure and function. But the globe valve and gate valve have some similarities in appearance, and both have the function of cutting off in the pipeline, so many friends who have little contact with the valve confuse them. In fact, if you look carefully, the difference between stop valve and gate valve is quite big. This article introduces the difference between stop valve and gate valve. In the case of limited installation space on the structure, attention should be paid to the type selection. 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 the valve is opened and closed, the sealing surface of the valve core and the valve seat always contact and rub 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 seriously. The structure of gate valve will be more complex than that of stop valve. From the appearance, in the case of the same caliber, the gate valve is higher than the stop valve, and the stop valve is longer than the gate valve. In addition, the gate valve also has the bright pole and the dark pole. The shut-off valve is not available.
Working principle when the stop valve is opened and closed, it is rising stem type, that is to say, when the hand wheel is turned, the hand wheel will rotate and lift with the stem. The gate valve is to rotate the hand wheel to make the stem move up and down, and the position of the hand wheel itself remains unchanged. Flow is different, gate valve requires full open or full close, and stop valve is not required. The inlet and outlet directions of stop valve are specified; The gate valve has no import and export direction requirements. In addition, the gate valve only has two states of full open or full closed, the gate gate opening and closing stroke is very large, and the opening and closing time is long. The movement stroke of the valve plate of the stop valve is much smaller, and the valve plate of the stop valve can stop at a certain place in the movement for flow regulation. The gate valve can only be used for truncation without other functions.