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Long - distance pipeline ball valve
The stagnant medium in the valve chamber due to temperature changes and abnormal boost, the medium pressure to push the seat out of the sphere, to achieve the effect of automatic pressure relief, the seat automatically reset after pressure relief.
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Ball valve series
Long - distance pipeline ball valve
Product structure features:
1. When the stagnant medium in the valve cavity is abnormally boosted due to temperature changes, the medium pressure pushes the valve seat out of the sphere to achieve the effect of automatic pressure relief, and the valve seat automatically resets after pressure relief.
2. When in case of fire or due to abnormal heating so that the valve seat ring burned or softened, the valve operation is still reliable, at the same time, the valve seat and the sphere to form metal to metal contact, to achieve temporary sealing effect, prevent the fire further expansion, in line with the provisions of APIFA.
3. Unscrew the discharge device to check whether the valve seat leakage, can also discharge cavity retention to reduce medium pollution to the valve. In working condition, when the valve is fully open or fully closed, the stuffing box of the valve stem can be replaced.
4. In addition to general sealing, the seat is specially equipped with auxiliary sealing structure, which can play an emergency rescue role in case of leakage due to sealing ring damage.
5. The valve stem is sealed with PTFR packing and 0 ring, especially suitable for gas medium. High quality SF self - lubricating bearings are used in the moving parts of the valve stem to reduce the friction system and reduce the operating torque.
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