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Frequently Asked Questions

Q: I need a custom built system, can NPI help?

A: Our expert technical team can specify and build a system suited to your unique requirements.

Q: Which LMI pumps will accept a 4-20 mA DC signal?

A: The LMI A9, B9, C9, M(with motor controller), & G-Series(with DC drive & motor controller) will accept a direct 4-20mA signal or can be controlled manually. Output from these pumps range from 10 GPD to 300 GPH.

Q: How can I automatically turn on a backup pump if my pump fails?

A: Our ALM family of pump monitors allow you to automatically switch on a backup pump in the event of a pump failure. Our ALM-9 provides a signal to TWO different electrical loads.

Q: My metering pump gives a "pulsating" type flow. How can I achieve a steady even flow of chemical?

A: Installing a BLACOH Sentry Pulsation Dampener in the discharge line will eliminate the "pulsating" flow from a metering pump. In addition, the BLACOH Sentry Pulsation Dampener will protect valves and fittings from pulsation and vibration.

Q: How long is the warranty period on LMI Pumps and Controllers?

A: The warranty period on LMI Pumps and Controllers is two (2) years from the date of installation. Elastomeric expendable parts are not covered under warranty.