State the high-pressure injection pump switching steps on-site?

First, check whether the bearing housing, coupling, anchor bolts, motor and other components of the standby pump are in good working condition, as well as the auxiliary systems such as circulating water, lubricating oil, and quenching steam for operating the standby pump. I won’t go into other preparatory tasks. Next, start the motor of the standby pump, open its minimum flow valve (an opening degree of 30%-50% is sufficient), and open the outlet valve of the standby pump to integrate it into the system. Then, close the minimum flow valve of the standby pump while opening the minimum flow valve of the pump that has taken over its role until it is fully open. Close the outlet valve of the pump that has taken over, shut down its motor, adjust the flow rate by controlling the outlet valve of the standby pump that is now in operation, and proceed with the procedures necessary to shut down the pump.

Preparatory work (P) – Ensure that the motors and pump components are complete and in good working condition; tighten the anchor bolts. Open the inlet and outlet valves for cooling water to confirm that the water flow is smooth and the pressure is normal. (P) Verify that the quality of the lubricating oil in the gearbox is satisfactory and that it has not emulsified. (P) Ensure that the oil level in the gearbox is at 1/4 above the center of the oil sight gauge. (P) Check that the oil pressure in the main supply pipeline is ≥0.15 MPa. For the low oil pressure interlock in the lubricating oil system: bypass the condition indicating that pump P5202 is not operating in the EMD control panel, and record the interlock value. For the low oil pressure interlock in the lubricating oil system: work together with the operator to switch the system from manual to automatic mode; turn the start/stop switch to stop position, then switch it to automatic mode. Rotate the pump shaft 3 to 4 times in the desired direction to ensure that it rotates smoothly, without any sticking or abnormal noises. (P) Confirm that the pump inlet valve is fully open and that the pressure gauge is functioning properly. Start the pump. After confirming that the EMD interlocks have been reset and the system is in automatic mode, start the motor. When the pump’s outlet pressure approaches the normal operating pressure, open the outlet valve so that the pump can operate under load. & (I)—Contact the operator to adjust the valve at the pump outlet that leads back to the tank, so that the water injection volume meets the process requirements and the outlet pressure remains stable. (P)—Check the motor bearings, as well as the temperature rise and vibration of the pump’s radial bearings; the temperature should not exceed the alarm threshold of 750I, nor the tripping threshold of 950I, in which case the pump should be stopped. & (I)—Coordinate with the operator to disengage the pump from the interlock system, close the outlet valve until only 1/6 of it remains open, then stop the main motor and close the outlet valve. While the main motor is stopped, the operator should bypass the “P5202 not operating” condition shown in the pump startup interlock screen within the EMD system. & (I)—Verify whether the auxiliary oil pump starts automatically: when it does start automatically, the operator should record the oil pressure value at that moment ； If automatic startup does not occur, the operator shall immediately start the auxiliary oil pump manually – once the pump shaft stops rotating, close the inlet valve – check inside that the EMD interlock is in the manual position (&(I)) – verify that the operating parameters of the oil system are normal – turn the pump shaft 3–4 times to ensure smooth operation – reduce the flow rate of water at the inlet and outlet valves of the oil cooler