Calculation methods for fail open and fail close pressure differences of control valves
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What is the difference in the calculation methods for the pressure differential of control valves in fail open and fail close modes? Additionally, how is the pressure differential of the control valve that regulates the minimum flow rate for the pressure differential valves between the reactors in the regeneration system calculated? I would appreciate guidance from the experts. Thank you
The closing pressure difference takes into account the pressure when the valve is closed. Generally, when selecting the actuator as well as the required thrust or torque, the closing pressure difference is used as a reference; if this value is not available, the pressure before the valve is used instead!