DIN3352 F4 resilient seated gate valve tells how the gate valve moves?
When the gate valve is closed, the sealing surface can only rely on the medium pressure to seal, that is, only rely on the medium pressure to press the sealing surface of the gate to the valve seat on the other side to ensure the sealing of the sealing surface, which is self-sealing. Most gate valves use forced sealing, that is, when the valve is closed, the gate must be forced against the valve seat by external force to ensure the tightness of the sealing surface. So do you know how it works? Let’s take a look at it with the editor of DIN3352 F4 resilient seated gate valve!
Movement mode: The gate of the gate valve moves in a straight line along with the valve stem, which is also called the open-rod gate valve. Usually there is a trapezoidal thread on the lifting rod, through the nut on the top of the valve and the guide groove on the valve body, the rotary motion is changed into linear motion, that is, the operating torque is turned into operating thrust. When the valve is opened, when the lift height of the gate is equal to 1:1 times the valve diameter, the fluid passage is completely unblocked, but this position cannot be monitored during operation. In actual use, it is marked by the apex of the valve stem, that is, the unmovable position, as its fully open position. In order to consider the lock-up phenomenon due to temperature changes, the valve is usually opened to the apex position, and then rewind 1/2-1 turn, as the position of the fully open valve. Therefore, the fully open position of the valve is determined by the position of the gate (that is, stroke). Some gate valve stem nuts are installed on the gate, and the rotation of the handwheel drives the rotation of the valve stem to lift the gate. This kind of valve It is called a rotating rod gate valve or a dark rod gate valve.
In summary, the editor of DIN3352 F4 resilient seated gate valve describes the movement of the gate valve. I hope it can help you.