Problems with the hydrogen feed pump
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What is the function of the safety valve at the inlet of the feed pump in a hydrocracking unit?
Send the flowchart with control points
Some interlocks will stop the feed pump and close the feed pump inlet isolation valve. Since the pressure rating of the inlet pipeline is low, pressure backflow at this time can be dangerous; therefore, a safety valve is installed.
Don’t all pump outlets have check valves?
The setting pressure of the pump outlet safety valve is very high, while the pressure in the inlet pipeline is much lower than this value
To prevent excessive pressure buildup in the pump due to slight internal leakage from the outlet valve after the inlet and outlet valves are closed, which could lead to overpressure in the mechanical seal and the inlet pipeline and thus damage to the equipment