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Configuring the right pump with the right motor is critical. Using the wrong assumptions could result in ordering the wrong pump for its intended purpose.

 

At a minimum, ordering the wrong pump and motor configuration will result in downtime due to reordering, additional deliveries, and a little embarrassment for not doing it right the first time. On the other hand, ordering and installing the wrong motor has its own set of problems!

 

In addition to the knowing the basics of the pump’s flow rate and head (in PSI or feet), here are 3 often overlooked aspects of specifying the correct motor.

 

TEFC or ODP Motor?

 

Do you need an ODP, Open Drip Proof, motor enclosure which has open vents that bring outside air into the motor to flow directly over the windings? These are to be used in a clean environment.

 

Or a TEFC, Totally Enclosed Fan Cooled motor? These have a non-vented enclosure to prevent foreign objects and light moisture from falling on and entering the motor.

 

Read more about ODP vs TEFC motor cooling details.

 

Single-Phase or 3-Phase Motor?

 

What kind of connections will you need? Single-phase electric motors use two wires (two conductors) and use a single alternating voltage. Since it only generates one magnetic field, it needs capacitors and auxiliary winding for startup.

 

Single-phase motors can provide power to 15 hp.

 

3-phase motors contain three hot wires and uses three alternating currents of the same frequency. They do not need a capacitor for startup. All three-phase motors are reversible.

 

Three-phase motors can provide power of up to 400 hp.

 

Materials of Construction?

 

Materials depend on the application of use.

 

• There are many grades of stainless steel, and it is excellent for corrosion resistance and high-temperatures, and suitable for chemicals, saltwater, and food processing.
• Cast iron is affordable, durable, and strong, and good for general-purpose water transfer.
• Plastic is lightweight and corrosion-resistant, but less durable at high temperatures.

 

Be sure to address these questions while discussing the project with your customer BEFORE getting a quote and ordering their pump and motor. It will make the ordering process accurate and timely, and right the first time.

 

If you have questions about specifying a pump/motor, call, email, or live chat with one of our customer service team at webtrol.com.