The advantages and disadvantages of flanged gate valve in low temperature

Low temperature flanged gate valve advantages: 1, the fluid resistance is small. 2, open and close the required external force is small. 3, the flow of medium is not restricted. 4, wide open, the sealing surface erosion by working medium is smaller than globe valves. 5, is relatively simple, the casting process is better. Low temperature flanged gate valve disadvantages: 1 open height are larger, size and shape. Install the required space. 2, in the process of opening and closing, has the relative friction sealing surface, easy to cause scratches. 3, low temperature flange gate two seal face, adds some difficulties to machining, grinding and maintenance.