Best Practice: ANSI Pumps - Selection
Operate pumps at 85% to 110% of best efficiency point (BEP).
Best Practice: ANSI Pumps - Selection
Ensure NPSHA is 20% or 1.5m (5ft) over NPSHR, whichever is greater.
Best Practice: ANSI Pumps - Selection
Impeller trims of 75% are optimal, so trim impellers 60% to 95% of maximum.
Best Practice: ANSI Pumps - Selection
Consider using variable speed technology for multiple operating point conditions.
Best Practice: ANSI Pumps - Installation
Level pump, base & motor, and ensure the area is free of soft foot conditions.
Best Practice: ANSI Pumps - Installation
Provide at least 10 diameters of straight pipe to the pump's suction inlet.
Best Practice: ANSI Pumps - Installation
Use highly rigid baseplates, such as reinforced stilt or grout installed designs.
Best Practice: ANSI Pumps - Installation
Utilize low shrink grout to install baseplates. Epoxy grout is superior.
Best Practice: ANSI Pumps - Installation
Design piping to ensure minimum stress, i.e., fasteners should be installed without force.
Best Practice: ANSI Pumps - Alignment
Use laser or reverse dial indicator technology to align pump & motor.
Best Practice: ANSI Pumps - Alignment
Align before and after the pump & piping are bolted together.
Best Practice: ANSI Pumps - Alignment
Consider using C-flange motor adapters when pumping fluids hotter than 95°C (200°F).
Best Practice: ANSI Pumps - Alignment
For pumping temperatures greater than 175°C (350°F) consider centerline mounted casing.
Best Practice: ANSI Pumps - Operation
Refer to equipment operation & maintenance manuals for start-up procedures and checklists.
Best Practice: ANSI Pumps - Operation
Slowly close process valves to avoid water hammer.
Best Practice: ANSI Pumps - Operation
Consider soft start for frequent on-off duty pumps.
Best Practice: ANSI Pumps - Operation
Avoid run-dry conditions.
Best Practice: ANSI Pumps - Operation
Operate spare pumps at least every three months to maintain proper working conditions.
Best Practice: ANSI Pumps - Preventive Maintenance
Change lubrication at recommended intervals.
Best Practice: ANSI Pumps - Preventive Maintenance
Protect lubricant from contamination.
Best Practice: ANSI Pumps - Preventive Maintenance
Maintain mechanical seal flush environment.
Best Practice: ANSI Pumps - Preventive Maintenance
Predictive maintenance, vibration monitoring and lubricant analysis are beneficial practices.
