Natural Gas Special Globe Valve

Natural Gas Special Globe Valve

Introduction:

This valve is used in the urban liquefied gas and petroleum gas storage station, as well as in the liquefied gas system of oil refineries, petrochemical plants and petrochemical plants, as the opening and closing device for controlling the medium cutoff. V-shaped Teflon is used as the dynamic seal and the packing pressure is used as the initial seal. With the increase of medium pressure, the packing sealing performance is enhanced. It has self sealing function and no manual maintenance. It is suitable for high and medium pressure transmission pipes. Avenue. All the valves are equipped with reverse seals. When the valves are opened, the valves must be fully opened to make the reverse seals work so as to increase the service life of the packing. In particular, the specification of “high in and low out” is adopted for ≥ DN200. The valve is light to open. The operating force is far less than that of ordinary valves.

Operating principle and Structure Description:

1. When the handwheel of the Non rising stem stop valve rotates clockwise, the valve rod moves downward, and the valve disc descends to make the sealing surface close. When the passage is cut off and reversed, the valve rod is opened and lifted to the Zui high point for sealing.

2. An upper seal is added to the Japanese stop valve. When the valve is opened, it has two layers of sealing effect with the packing and has a certain protection effect on the packing.

3. Nylon products are used as the sealing surface of the reverse sealing stop valve. The packing is soft shaped packing, and the upper seal is also soft material, with good sealing performance.

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