Advantages of the flange stop valve mechanism

    At present, many times the flange stop valve has the characteristics of a forced sealing valve, and the problem of no leakage due to the forced sealing surface, and the force of many closing valves is larger than the force of opening the valve, so the diameter of the valve stem must be large.

    In recent years, after the appearance of the self-sealing valve, the flow direction of the flange stop valve is changed from the valve flap to the valve chamber. At this time, under the action of the medium pressure, the force to close the valve is small, and the force of opening the valve is large, the valve The diameter of the rod can be correspondingly reduced. At the same time, this type of valve is also tight under the action of the medium. China's valve "three-way to give" has stipulated that the flow of the stop valve, all from top to bottom.

    Flange stop valve features

    1. Simple structure, convenient manufacturing and maintenance.

    2. The working stroke is small and the opening and closing time is short.

    3. Good sealing, small friction between sealing surfaces, long life.

    The type of the shut-off valve is divided into an external thread type and an internal thread type according to the position of the stem thread. According to the flow direction of the medium, there are straight-through, direct-current and angular. The shut-off valve is divided into seals, with a packing seal stop valve and a bellows seal stop valve.

    The structural form of the globe valve:

    The structure of the shut-off valve body is straight-through, direct-flow and right-angle. Straight-through is the most common structure, but its fluid resistance is greatest. DC fluid resistance is small, and it is mostly used for fluids containing solid particles or high viscosity. The right angle valve body is mostly forged, suitable for small through, high pressure shut-off valves.