Vacuum valves mainly include vacuum ball valve, vacuum butterfly valve, vacuum diaphragm valve, vacuum gate valve and vacuum stop valve. The types of vacuum valves are different, and the applicable occasions are also different. The following describes the characteristics and common areas of valves of different types such as gate valve, globe valve, butterfly valve and ball valve. Finally, according to the different use requirements, how to select the valve, such as according to the prevention of backflow of medium, according to the adjustment of medium parameters to select the valve.
The vacuum gate valve is used as a cut-off medium. When it is fully open, the whole flow is straight through, and the pressure loss of medium operation is the minimum. Gate valve is usually suitable for the condition that it is not necessary to open and close frequently and keep the gate fully open or closed. Not suitable for regulating or throttling. For the high-speed flow medium, when the gate is partially opened, it can cause the gate vibration, and the vibration may damage the sealing surface of the gate and the valve seat, and throttling will make the gate suffer from the erosion of the medium.
From the structural form, the main difference is the form of sealing elements used. According to the form of sealing elements, gate valves are often divided into several types, such as wedge gate valve, parallel gate valve, parallel double gate valve, wedge double gate valve, etc. The most common forms are wedge gate valve and parallel gate valve.
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