The Grundfos CR 1s Vertical Multistage Centrifugal Pump (CR 1s) is part of the Grundfos CR range, engineered in Cast iron / 304 stainless. Delivers up to 4 GPM at heads up to 420 ft, with motor sizes from 0.5-1 HP. Drive: Fixed-speed NEMA TEFC motor, 60 Hz. Used in Industrial pressure boosting and similar applications.
Specifications
| Max flow | 4 GPM (60 Hz) |
| Max head | 420 ft |
| Max working pressure | 290 psi |
| Motor range | 0.5-1 HP |
| Stages | up to 36 |
| Frequency | 60 Hz |
| Voltage | 115/230 V single-phase or 208-230/440-480 V three-phase (model dependent) |
| Liquid temperature | 5 - 250 °F (-20 - 250 °F with HQQV seal) |
| Construction | Cast iron / 304 stainless |
| Motor | Fixed-speed NEMA TEFC motor, 60 Hz |
| Brand | Grundfos |
| Model | CR 1s |
| Country of Origin | Denmark / USA (varies by model) |
Materials of Construction
Cast iron pump head, base & motor stool; AISI 304 stainless steel chambers, impellers and shaft; ceramic/carbon shaft seal (HQQE/HQQV)
Typical Applications
- Industrial pressure boosting
- boiler feed
- cooling-tower makeup
- condensate transfer
- washdown
- reverse osmosis pre-feed
- fire protection
- light-industry process water
Datasheets & Manuals
Frequently Asked Questions
- What is the maximum flow rate of the Grundfos CR 1s?
- The CR 1s delivers up to 4 GPM at 60 Hz.
- What is the maximum head/pressure of the CR 1s?
- Maximum head is 420 ft (about 290 psi). Actual operating point depends on stage count and motor size.
- What materials of construction are available for the CR 1s?
- Cast iron pump head, base & motor stool; AISI 304 stainless steel chambers, impellers and shaft; ceramic/carbon shaft seal (HQQE/HQQV)
- What applications is the Grundfos CR 1s suitable for?
- Industrial pressure boosting, boiler feed, cooling-tower makeup, condensate transfer, washdown, reverse osmosis pre-feed, fire protection, light-industry process water
- Can this pump be supplied with a variable frequency drive (VFD)?
- Yes - either order the matching E-Pump variant with integrated MLE motor (CRE / CRIE / CRNE / CME), or pair the fixed-speed pump with a Grundfos CUE external VFD.
- What shaft seal options are available?
- Standard HQQE (carbon/SiC with EPDM) for cold/warm water and HQQV (carbon/SiC with FKM) for hot water and aggressive media. Cartridge double seals available for hazardous duty.
- 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 CR 1s 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 CR 1s?
- 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 CR 1s configuration, NEMA motor, materials or seal type? Contact our pump engineering team for sizing assistance, pricing and lead times.
