Industrial Pumps & Pumping Systems

Industrial Pumps

Both your Graymills™ distributor and our factory trained representatives are prepared to offer any assistance in selecting the right pump for your application. The more information you can furnish, the quicker—and more precisely—the appropriate pump and/or pumping system can be selected.

The following information identifies the major factors to be considered in specifying a pump. If you are familiar with pump applications, you will need to refer only to the Motor Selection information in this section. Flow charts for each model appear on their individual pages.

Motor Selection For Pumps – How To Order

Pumps and Pumping Units are available with motors of all standard electrical characteristics. The most commonly used types are listed below with their Graymills Suffix. Other types of motors will be quoted upon request.

  1. After selecting the pump desired, select the type of motor with your required electrical characteristics. All Graymills pump motors are rated for 60 Hz operation and will operate continuously within plus or minus 5% of the rated voltage. Air motors are available for many models.
  2. Add the suffix letter to the base model number and also state voltage, hertz and phase when ordering.

Pump Performance– 50 Hertz

RPM and Performance of standard pumps at 60 Hz will be reduced when running at 50 Hz.

Special Power Requirements

Graymills supplies pumps worldwide and can supply motors meeting the electrical requirements of most areas. We regularly supply the following voltages; 220 volts, 50 Hz, 1 Ph; 380 or 415 volts, 50 Hz, 3 Ph. Please consult factory for more information.

Air Motors

Most Graymills pumps can be equipped with rotary air motors, which include needle valve and muffler. We recommend the use of an air pressure filter-regulator-lubricator.

Special Pump Tank Combinations

Graymills supplies special systems to thousands of customers. We welcome your inquiry on special combinations of pumps, tanks and filters.

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