The Grundfos CRE 3 Variable-Speed E-Pump (CRE 3) is part of the Grundfos CRE range, engineered in Cast iron / 304 stainless with E-motor. Drive: Integrated MLE IE5 permanent-magnet motor with onboard variable frequency drive (VFD). Used in Constant pressure water supply and similar applications.
Specifications
| Construction | Cast iron / 304 stainless with E-motor |
| Motor | Integrated MLE IE5 permanent-magnet motor with onboard variable frequency drive (VFD) |
| Brand | Grundfos |
| Model | CRE 3 |
| Country of Origin | Denmark / USA (varies by model) |
Materials of Construction
Cast iron head & base; 304 stainless internals
Typical Applications
- Constant pressure water supply
- variable-flow process water
- HVAC chilled/condenser water
- boiler feed with modulating control
- irrigation
Datasheets & Manuals
Industries & Applications
The Grundfos CRE 3 is widely deployed across these industries and use cases:
- Constant-pressure water supply to commercial buildings
- Closed-loop chilled water circulation in hvac
- Variable-flow chilled water pumping
- Irrigation with variable demand
- Reverse osmosis with variable recovery rate
- Modulating boiler feed control
- Process water with variable demand
Related & Compare
Frequently Asked Questions
- What materials of construction are available for the CRE 3?
- Cast iron head & base; 304 stainless internals
- What applications is the Grundfos CRE 3 suitable for?
- Constant pressure water supply, variable-flow process water, HVAC chilled/condenser water, boiler feed with modulating control, irrigation
- Is dry-run protection available?
- Yes - the Grundfos LiqTec sensor mounts inside the pump head and shuts down the pump if it detects dry running. Standard on most CRE configurations.
- Is the Grundfos CRE 3 available with stock or quick-ship lead times?
- Many configurations ship from stock through Grundfos USA. Contact ForeverPure Place for current lead time on your specific configuration.
- How do I get a quote for the Grundfos CRE 3?
- Use the Request Quote button on this page, call our sales team, or email sales@foreverpureplace.com with model, voltage, materials, seal type and quantity.
Need help selecting the right CRE 3 configuration, NEMA motor, materials or seal type? Contact our pump engineering team for sizing assistance, pricing and lead times.
Accessories for This Pump
Commonly specified alongside Grundfos E-pumps. Send us your pump nameplate and we will confirm the correct part for your exact build and voltage before you order.
- RPI Inlet Pressure Sensor
Inlet pressure protection with low-suction shutdown. 
VFS Flow & Temperature Sensor
Flow and temperature feedback to the pump’s onboard controller.- RPS Pressure Sensor
Discharge pressure feedback for constant-pressure booster control.
Building-automation connectivity
This pump accepts a Grundfos CIM interface card (or an external CIU box) to report to a BMS or PLC. All eight are the same card with a different protocol — choose the one your building system speaks:
CIM/CIU 100 GENIbus · CIM/CIU 150 PROFIBUS DP · CIM/CIU 200 Modbus RTU · CIM/CIU 250 Modbus TCP · CIM/CIU 300 BACnet MS/TP · CIM/CIU 500 EtherNet/IP · CIM/CIU GRM · CIM/CIU LonWorks