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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.

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