The Grundfos CU 321 is a constant pressure control system designed for use with 4″ larger Grundfos SP pumps and motors. This wall mounted system maintains a constant pressure within the maximum pump performance in spite of varying water consumption.

Applications

For 4″ or larger wells:

Domestic and light commercial water supply
Irrigation
Livestock watering
Water transfer

Features & Benefits

Complete solution from one manufacturer
Easy setup: Simply select pump model and choose pressure setpoint
Four pump choices: Offered in most popular sizes, both 3 and 5 hp: 15, 25, 40 and 75 gpm
Matched pump and motor: 3 hp pump on 3 hp motor and 5 hp pump on 5 hp motor
Respects original operating designs; operates pump and motor within its designed rpm and hp ratings
Built-in protection features: soft-start, dry run, overload, over/under voltage, sensor alarm
Wide voltage range: 3 hp unit; single phase 208-240 VAC (+/- %) – 5 hp input; single or 3-phase 208-240 VAC (+/- %)

Technical Data | Related Products

Manufactured by: Grundfos

Additional Information

Ask a Question

• Name*
  First Last
• Email*
• Sales Territory*
  • I am within BBC Pump's Sales Territory (IN, IL or KY)**
• Regarding
  New Pump / EquipmentReplacement Pump / EquipmentService / RepairPartsOther
• Manufacturer
• Model
• Question*
• Learn More
  • I would like to learn more about pumps monthly via email.
• Name
  This field is for validation purposes and should be left unchanged.

Δ

* Required Field
** Territory restrictions apply for most products.

Technical Data

Refer to Product Datasheets for Additional Technical Information