NRF-VS Variable Speed Control (obsolete)

Bell & Gossett : Pumps & Circulators : Small Circulation Pumps (Boosters)

NRF-VS Pump Control is a versatile variable speed control for use in hydronic heating and cooling applications.

Designed for use in hydronic heating and cooling applications. The temperature of the water is controlled by regulating the speed of the pump which injects water from a different temperature water loop (Primary loop) into a controlled loop (Secondary loop).

As the speed of the pump increases, more water is sent into the Secondary loop, resulting in a secondary loop water temperature change.

The NRF-VS Control is available either installed on a B&G NRF-22 or as a field mountable controller that can be installed onto a B&G wet rotor in the field. The snap-on design allows the NRF-VS to be quickly attached to a standard B&G wet rotor circulator.

General Selection Tools:

  • ESP-PLUS for B&G Centrifugal Pumps, Booster Pumps, Pump Accessories, and Air Separator
  • ESP-PARTS for replacement parts selection
  • CAD Drawings for 2D and 3D dimensional drawings in many formats

Heat Exchanger Product Selection

Steam + Water Pressure Reducing Values

Sizing Tools:

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Consult your local Bell & Gossett Representative for additional assistance.

Bell & Gossett is a leading manufacturer of pumps, valves, heat exchangers, and accessories for plumbing, wastewater, and HVAC—including steam and heat transfer—applications. To build and operate an efficient water system, you need both the right products and experts who know the application. Here, you can access Bell & Gossett’s trusted network of partners who have the experience you need to get the job done right.

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