Does anyone know the principle behind the installation direction of the high and low pressure sides of a ball valve for track use?
Thread Content
Figure 1 shows the outlet of the new hydrogen compressor, while Figure 2 shows the main pipe for the new hydrogen outlet. Does anyone know the principle behind the installation direction of these two sets of ball valves?
The image is not clear. Ball valves with track mechanisms are generally forced-seal ball valves, used in applications where high sealing performance is required, such as downstream of flow meters, to prevent unauthorized flow leakage. The installation direction of such ball valves is determined by the actual process requirements; for example, when installed downstream of a flow meter, if that flow meter is not in use (or is bypassed), the sealing surface of the ball valve should be located on the upstream side, closer to the flow meter. Otherwise, the sealing surface of the ball valve will be subjected to reverse pressure
Ball valves typically have a maximum reverse pressure difference; exceeding this value can lead to internal leakage of the valve, an increase in the torque required to open and close it, and wear of the sealing surfaces. Therefore, it is generally not advisable to install such valves in the reverse orientation