Light Weight The Valve Is Made up of Ductile Cast Iron

The Defects of Gate Valve (1) easy to damage the sealing surface when the hoist ram in contact with the valve seat and seal, more difficult to repair. (2) large dimensions, the larger the space required for opening, need long time for opening... (3) complex structure The classification of gate valve according to the sealing surface configuration can be divided into wedge type gate valve and flat gate valve. Wedge gate-type valve can be divided into single disc gate valve, double disc gate valve and flexible gate valve; flat gate valve can be divided into single disc gate valve, double disc gate valve. According to the stem of the screw position, it can be divided into outside screw rising stem gate valve, inside screw non-rising gate valve. The features of gate valve 1. Light Weight The valve is made up of ductile cast iron similar to resin sand's structure and will have high strength and small volume which makes its weight about 70 ~ 80 of general gate valve's. It is easier to install and maintain these valves in the pipe-line. 2. No - grooved body cavity There is no groove in resilient seated gate valve's body, so the resistance to fluid is little and no sundries piled up in the body and fluid can flow without block. 3. Wedged rubber - packed wholly The outside rubber adheres to the metal wedge tightly and will not fall off from the metal wedge. The rubber is having good elasticity and the whole wedge is replaceable. 4. Close tolerance cast valve body The body is made up of close tolerance casting and can ensure the valve's sealing effect without machining the internals of the body. Source: Valvehardware