Question: The sequence for starting a high-pressure centrifugal pump with its own lubrication system, the operations to be carried out after it starts running, and the steps for shutting it down.

Post your high-pressure pump model and manufacturer... It should be done according to the instructions provided by the manufacturer... :lol

Operating Procedures for Centrifugal Pumps I. Pre-startup inspections 1. Check whether the anchor bolts of the pump are tightened and whether the coupling cover is properly installed. 2. Check whether there are gaskets on the inlet and outlet flanges of the pump, and whether the flanges are tightened properly. 3. Check whether the pressure gauge of the pump is installed, and whether its installation location and pressure rating meet the requirements. 4. Check whether there is a filter screen at the pump inlet (a temporary filter screen is used during single-unit testing, and it is replaced with a permanent one thereafter). 5. Flush the fuel tank and fill it with qualified lubricating oil; if it is a fuel gauge, the oil level should be above 1/2, while if it is a sight glass, the oil level should be between 1/2 and 2/3 of the sight glass’s range. 6. Check that the motor’s grounding wire is connected and tightened properly. 7. Check whether the seal oil line and flushing line of the pump are loose, and whether they are easy to operate when installed. 8. Check whether the liquid level in the seal oil tank is within the specified range, whether the pressure is normal, and whether the transmission instruments are functioning properly. 9. Check whether the alignment of the pump and motor is within the specified range. 10. Is turning the pump easy to handle, and is there any friction inside the pump? 11. When testing the motor for the first time, it is necessary to check whether the motor’s rotation direction matches the expected direction; if not, the motor’s wiring needs to be adjusted electrically. 12. Check whether the area around the pump is clean; ensure there are no debris or oil stains, and if any are present, they must be removed to avoid affecting operation. II. Preparatory work before startup 1. Ensure that the process preparations are in place to meet the conditions for starting the pump, and that the process flow is unobstructed. 2. Call the electrician and fitter to the site to power on the motor. 3. Connect the seal oil line, flushing line, and their cooling water systems. 4. Open the pump’s inlet, vent the pump, and fill it; after filling, close the vent valve. 5. Open the pressure gauge valve, but not to a large degree (open it 2–3 notches). 6. If it is a high-temperature pump, check whether the bypass valve (3/4 inch) of the outlet valve is open; if it is closed, it should be opened to preheat the pump. The preheating rate should not exceed 25°C/h, and the valve should not be opened too much to avoid causing the pump to run in reverse. The pump is ready to be started once its temperature is uniform and similar to that of the medium. 7. The pump should be turned manually during the preheating process. 8. After preheating, inspect again all the sealing points of the pump (inlet and outlet flanges, flushing line connections, pressure gauge, mechanical seal, inlet and outlet valve packings, etc.) to check for any leaks; if necessary, perform thermal tightening. 9. Rotate the shaft again to check for any internal friction. III. Starting the pump 1. The pump can be started only after the inspection and preparation work are completed and verified to be correct. 2. First, slightly open the outlet valve (1–2 turns), then close it a bit, and press the motor button to start the motor. 3. When the motor sound is normal and even, and the pressure indicated by the pressure gauge reaches the normal value, slowly open the pump outlet valve. 4. At the same time, the operator should activate the control valve to keep the flow unobstructed and prevent pressure buildup. 5. Check that the motor current is within the rated range. 6. Check whether the sound of the pump and motor is normal, whether there is vibration, and whether the bearing temperature is normal. 7. Check whether the mechanical seal of the pump is leaking (whether the seal oil pressure and flushing pressure are normal). In the case of a tandem seal, if the first seal leaks, the liquid level or pressure in the seal tank should rise (provided that there is no pressure in the seal tank; otherwise it should drop). If the second seal leaks, there should be a significant amount of leakage to the atmosphere. 8. After operating for a period of time, check whether the sealing system is functioning properly; generally, there should be a temperature difference between the two inlet and outlet lines of the sealing tank. 9. Check whether the oil level in the pump’s oil reservoir has dropped; the operator may leave only after confirming that everything is normal. 10. Inspection standards: Vibration: For a rotation speed of 750 revolutions per minute to 1500 revolutions per minute, the vibration level should be ≤0.08 mm; for a rotation speed of 1500 revolutions per minute to 3000 revolutions per minute, it should be ≤0.06 mm. Temperature: For rolling bearings, the temperature should be ≤75°C; for the motor casing, it should be ≤95°C, or the increase in temperature relative to the ambient temperature should be ≤40°C. 4. Shutting down the pump: 1. Slowly close the outlet valve. 2. Stop the motor. 3. Depending on the specific circumstances, determine whether the pump is to be kept in standby or repaired; if it is to be in standby, open the bypass valve (3/4 inch) of the outlet valve to preheat the pump ； If processing is required, the corresponding processing steps will be carried out. Pump shutdown steps 3.1 Close the pump outlet valve. 3.2 Stop the motor. 3.3 Shut off the cooling water; however, it should not be turned off in winter to prevent the pipelines from freezing. 3.4 For hot oil pumps, open the preheating valve appropriately to keep the pump in a preheated state. 3.5 For pumps that use flushing fluid or sealing oil, stop the supply of such fluid. V. Pump switching steps 1. Start the standby pump following the normal startup procedure. 2. Slowly open the outlet valve of the standby pump while gradually closing the outlet valve of the operating pump, until the outlet pressure of the standby pump is under normal control, at which point the outlet valve of the operating pump should be fully closed. 3. Stop the pump following the normal shutdown procedure.

What was mentioned above refers to the procedures for ordinary centrifugal pumps; what the original poster is asking about is another type of centrifugal pump, namely the GSB series. The procedures for this series are as follows: 5 Operating Procedures for GSB Series Pumps 5.1 Preparations before startup 1) Check that the corner bolts of the pump base are firmly tightened, that the power cables and grounding wires of the motor are connected properly, that the lubrication oil pipelines and the cooling water pipelines of the cooler are correctly connected, that there are no leaks in any of the pipelines, and that all instruments are in good working condition； 2) Fill the gearbox with oil by adding imported ATF220 or 8# hydraulic transmission fluid that has been filtered through three 80-mesh filters, until the oil level reaches the midpoint of the oil gauge, and then install the vent cover ； 3) Open the inlet valve to fill the pump with liquid; open the outlet valve to remove the air from the pump, then close the outlet valve ； 4) Check whether the coupling guard is securely installed ； 5) Turn on the cooling water; the parameters for the cooling water are: Pin=0.3–0.35 Mpa, t=20℃, tmax

Poster: Check here to see if there’s what you need (click the title to go directly to the hyperlink): 1. Operating procedures for centrifugal pumps 2. Operating procedures for CZ-type chemical centrifugal pumps and pneumatic diaphragm pumps 3. Operating procedures for high-speed centrifugal pumps in a certain refinery 4. Operating procedures for centrifugal pumps 5. Does anyone know the procedures for starting, stopping, and switching centrifugal pumps? 6. Operating Procedures for Single Unit of Ordinary Centrifugal Pumps.doc 7. Methods of Operating Centrifugal Pumps 8. Procedures for Operating Centrifugal Pumps 9. Parallel Operation of AC Centrifugal Pumps and Variable-Frequency Centrifugal Pumps 10. What are the correct operating procedures for centrifugal pumps and why? 11. Operating procedures for high-speed centrifugal pumps 12. Operation and maintenance manual for the control system of hydraulic turbine centrifugal pumps 13. Operation and maintenance of centrifugal pumps 14. Operating procedures for centrifugal pumps 15. Instructions for operating centrifugal pumps 16. Principles and operation of centrifugal pumps 17. Safe operation of centrifugal pumps.rar 18. Operation and use of multi-stage vertical centrifugal pumps 19. Methods of operating centrifugal pumps 20. Questions and answers on the operation techniques of centrifugal pumps (II) 21. Discussions on the operation of centrifugal pumps (II) 22. Discussions on centrifugal pump operation 23. Questions and answers on centrifugal pump operation techniques 24. Differences between multi-stage and single-stage centrifugal pumps in terms of operation and design 25. Safe operation of centrifugal pumps 26. Issues to be noted in the operation and maintenance of centrifugal pumps 27. Safe operation of centrifugal pumps 28. Operation of centrifugal pumps

15 High-speed (pressure) centrifugal pump a. Normal startup procedure: Preparation before starting 1. Preparations before startup: (1) Wear appropriate personal protective equipment and prepare the necessary tools； (2) Check that the pump inlet and outlet flow conditions as well as the liquid level in the inlet tank meet the requirements for starting the pump ； (3) Open the inlet valve and slightly open the pump outlet vent valve; once oil is visible in the vent and no gas is present, close the vent valve ； (4) Check that the lubricating oil level is appropriate, that instruments such as pressure switches and pressure transmitters are functioning properly, and that the circulating water for the oil cooler is in operation ； (5) Manually start the auxiliary oil pump and observe the lubricating oil pressure ； (6) Check that the pumps, pressure gauges, coupling covers, coupling bolts, foundation bolts, valves, and pipeline flange gaskets are in good condition ； (7) Manually turn the shaft two full turns; there is no unevenness in the torque ； (8) Ensure the backflow process of the high-pressure injection pump is operational; inform the operator inside the plant to adjust the opening degree of the backflow control valve, and have the operator on site verify that the opening degree is normal ； (9) The external operation report indicates that the conditions for starting the pump on the internal side are met; the interlock on the internal side has been reset, and it can be seen on the DCS that the conditions for starting the high-pressure water injection pump are also met. 2. Pump startup: (1) Once the start conditions for the high-pressure injection pump are met, notify the operator to start the motor ； (2) After starting the motor, manually control the pump outlet flow rate ； (3) On the outside, check that the sounds of the motors and pumps are normal; monitor the increase in lubricating oil pressure, then stop the auxiliary oil pump motor and set the switch to the automatic position. On the inside, monitor the lubricating oil pressure ； (4) The operator on site reports that everything is normal; the operator inside checks and shuts down the feed control valve, then informs the operator outside to restore the feed flow ； (5) Once the process is connected, the operator adjusts the opening degree of the outlet control valve according to production requirements, slowly closes the return tank control valve to control the flow rate at the pump inlet, ensuring that the motor current does not exceed the rated value ； (6) Change the tank control valve to automatic mode and set the pump outlet flow rate. b. Normal pump shutdown procedure: 1) The operator slowly opens the return tank control valve of the pump in use, while simultaneously slowly closing the return tank control valve of the standby pump, in order to control the flow rate at the inlet of the main pump ； (2) Adjust the opening of the pump return tank control valve and the inlet flow rate as appropriate; the operator shall close the outlet valve of the pump in use, shut down the main motor, and verify that the auxiliary oil pump starts up automatically properly and that the lubrication oil pressure is within normal limits ； (3) Stop the auxiliary oil pump when the temperature of the pump gearbox in use is not greater than 40°C. c. Steps for switching to the backup pump: (1) After the backup injection pump is started and is operating normally, the operator responsible for external operations activates the pump operation procedure; meanwhile, the operator responsible for internal operations slowly opens the return tank control valve of the pump in use. Depending on the amount of water being injected, the return tank control valve of the backup pump is slowly closed, so as to maintain a constant total amount of water injected and to control the flow rates at the inlet of both the backup pump and the pump in use ； (2) Adjust the opening degree of the pump return tank control valve; set the control valve for the standby pump’s return to the tank to automatic mode, and specify the pump inlet flow rate ； (3) Outside the plant, close the outlet valve of the pump in use, stop the main motor, and verify that the auxiliary oil pump starts automatically as expected and that the lubricating oil pressure is normal ； (4) Stop the auxiliary oil pump when the temperature of the pump gearbox in use is not greater than 40°C. d. Normal inspection items: (1) Pump outlet pressure (2) Lubricating oil pressure (3) Bearing temperature and vibration conditions (4) Whether the mechanical seal is leaking (5) Changes in motor current (6) Cooling efficiency of the cooling water (7) Whether the flushing oil flow is unobstructed (8) Whether the pressure difference across the lubricating oil filter is normal. e. Put the lubricant high-level tank into use: (1) Open the manual valve to feed oil into the high-level tank; when the oil level reaches around 80%, close the manual valve and allow the level to adjust automatically until there is reflux. f. Switch the lubricant filter: Activate the standby filter circuit, open the low-point drain valve to remove all liquid, then close it. Slowly open the connection valve and open the high-point vent valve; once oil appears, close it. Quickly switch to the filter and close the connection valve. g. Clean the lubricant filter: Close the upstream and downstream manual valves, open the high-point vent valve and the low-point drain valve to drain all the oil, and inform the mechanic to clean the filter. h. Put the lubricant oil cooler into use: Check the circuit, open the low-point drain valve to remove all liquid, then close it. Slowly open the connection valve and open the high-point vent valve; once oil appears, close it. Quickly switch to the cooler and close the connection valve.