PUMPS - START UP, SHUTDOWN AND ROUTINE MAINTENANCE PROCEDURE

PUMPS - START UP, SHUTDOWN AND ROUTINE MAINTENANCE PROCEDURE

Start Up Procedure:

• Check all pipework and associated equipment is clean and free from debris and that pipe connections are secure and leak free.

• For pumps installed with flushed mechanical seals check all auxiliary services are in place and connected and provide sufficient flow and pressure for flushing purposes.

• For pumps installed with Fluid Barrier devices on Front Cover / Rotorcase joint and Rotorcase port connections, check all auxiliary services are in place and connected and provide sufficient flow and pressure.

• Ensure lubrication is provided for both pump and drive. Concept SQ pumps are despatched without oil and should be filled to the level of the oil sight glass which must be installed in the upper tapped hole in the side of the gearbox cover,for pump oil capacities and grades.

• Check that, if an external relief valve is incorporated in the system, it is set correctly. For commissioning purposes it is considered good practice to set the relief valve lower than the system design pressure. On completion of commissioning the relief valve should be reset to the required setting for the application. The required setting should never exceed the lower of either the pumps maximum pressure rating or the system design pressure. 

• Ensure both suction and discharge valves are fully open, and pipework is free from all obstructions. Concept SQ pumps are of the positive displacement type and should therefore never be operated against a closed valve as this would result in pressure overload, resulting in damage to the pump and possibly the system.

• Ensure rotation of the drive shaft is correct for the direction of flow required.

• Ensure product is available in the suction vessel before starting pump, this is very important for pumps installed with single mechanical seals not being serviced with a quench or flush as these sealing arrangements must never be allowed to run dry.

• Before commencing operation it is considered good practice to momentarily start/stop the pump to check the direction of rotation and ensure that the pump is free of obstructions. Once this has been carried out commence operation keeping a visual check on suction and discharge pressure gauges and monitor pump temperature and power absorbed where possible.

Shutdown Procedure:

When shutting the pump down, close both the suction and discharge valves 

and ensure that the necessary safety precautions are taken: -

• The prime mover power source has been isolated.

• That, where employed, mechanical seal flush, rotorcase port connection barrier flush and front cover barrier flush auxiliary services have been isolated, de-pressurised and fully drained.

• That, where employed, heating / cooling devices have been isolated, de-pressurised and fully drained.

• Pump head and pipework have been drained and purged.

Routine Maintenance:

• Check mechanical shaft seals for leakage.

• Check oil levels regularly.

• Change the oil every 12 months or 3000 operating hours whichever is the sooner. For lubricant capacities and grades.

FOR LUBRICANT CAPACITY AND GRADES