What's the work of the stop valve
The [survey] stop valve means a valve that is automatically opened and closed on the movement of the medium itself and is designed to prevent its reversal, also known as the reversible valve, the one-way valve, the reverse flow valve and the back pressure valve. The stop valve is an automatic valve whose main function is to prevent the back flow of the medium, the reversal of the pump and the driving motor, and the discharge of the container medium. The stop valves can also be used to resupply the pressure that may rise to a piped system that exceeds the system pressure. The valves can be divided mainly into spin-off valves (rotation by centre of gravity) and lift valves (move along the axis)。
The function of valves of the type to stop valves is to allow the movement of media only in one direction and to prevent movement in the opposite direction. Typically, such valves work automatically and are opened by a flow of fluid pressure in one direction; when the flow of fluids is reversed, the flow is cut off by the flow pressure and the self-regulating valve of the valve。
The aborted valves are of this type and include the merchandised valves and the lifting valves. The revolving valve has a chain structure and a valve like a door is free to lean on the surface of the tilted valve. In order to ensure that the valves are in a suitable position at each time, they are designed to be in a chain structure so that the valves have enough spin-off space and have real, comprehensive contact with the valves. Valves can be made entirely of metals, or they can be coated with leather, rubber, or combined coverage, depending on the performance requirements. The flow pressure is almost unobstructed in a fully open state, so the pressure dropped through the valve is relatively small. The valves of the rise and drop valves sit on the valve seal. In addition to being free to rise and fall the valve, the rest of the valve, like the terminal valve, is subject to fluid pressure that lifts the valve from the seal of the valve, and the return flow of the medium causes the valve to fall back to the valve and cut off the flow. Depending on the conditions of use, the valve may be a whole metal structure, or in the form of a rubber pad or ring embedded on the valve shelf. Like terminal valves, the flow of fluids to stop valves by lift-down is also narrow, so the pressure to stop valves by lift-down is larger than the flow of valves by spin-off, and the flow of revolving valves is rarely restricted。
These are organized for information purposes on issues encountered in the practical work of the participants, and should be communicated and corrected in a timely manner。
