High-pressure ball valve stem seal
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Can VITON AED O-rings be used for the stem sealing of high-pressure ball valves? Two O-rings are designed to be installed on the stem; the pressure is 320 kilograms, the medium is water, and the temperature is 99°C.
The pressure is too high; it probably won’t work
It probably won’t work; graphite packing or tetrafluoroethylene is usually used
Water at 1,32 MPa; two sealing chambers made of 2Viton AED – indeed resistant to high temperatures, explosions, and pressure, but it’s not known to what extent. 3 Consider the ball valve in the open position; when it is half-open, the medium pressure acts directly on the sealing chamber. Therefore, it is not feasible from the perspective of safety and reliability. You can follow the approach used for high-pressure valve packing chambers by enlarging the sealing chamber, using multiple sets of seals, and even consider adding an external port for injecting high-pressure sealant. In this operating condition, any leakage is extremely dangerous. Even if it’s made, form tests will probably still need to be carried out