Issues of design deviation between the pressure before the instrument valve and the actual pressure
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For the cooling water valve at the temperature and pressure reduction station, the design institute specified a pressure of 6 MPa in front of the valve; however, the actual operating pressure on site can reach 7 MPa. Now that we want to purchase new valves, does this pressure specification need to be changed?
It would be better to change the parameters in this case.
If you want to change it, just change it to white. . . Change 6 to 7, change it to 10, change it to 700. . . Dig however you want. . .
It’s best to make modifications; otherwise, the pressure difference across the valve will be too high.
It needed to be modified, but design changes were made in the end. Because when the maximum pressure before the valve changes, the pressure difference across the valve changes as well, which affects the thrust exerted by the actuator; thus, when this pressure difference increases, the actuator needs to be recalculated.