The Grundfos CRN 3 Vertical Multistage 316 Stainless Steel Pump (CRN 3) is part of the Grundfos CRN range, engineered in All 316L stainless steel. Drive: Fixed-speed NEMA TEFC motor, 60 Hz. Used in Reverse osmosis high-pressure feed and similar applications.
Specifications
| Construction | All 316L stainless steel |
| Motor | Fixed-speed NEMA TEFC motor, 60 Hz |
| Brand | Grundfos |
| Model | CRN 3 |
| Country of Origin | Denmark / USA (varies by model) |
Materials of Construction
All AISI 316L stainless steel wetted parts (head, base, chambers, impellers, shaft); FKM or EPDM elastomers
Typical Applications
- Reverse osmosis high-pressure feed
- seawater pretreatment
- chemical processing
- ultrapure water
- potable water boosting
- food/beverage CIP
- pharmaceutical water systems
Datasheets & Manuals
Industries & Applications
The Grundfos CRN 3 is widely deployed across these industries and use cases:
- Seawater reverse osmosis (swro) high-pressure feed
- Brackish water ro feed and booster
- Ultrapure water (upw) loop pumping for semiconductor manufacturing
- Pharmaceutical purified water loops (usp)
- Chemical process transfer with chloride exposure
- Food-grade hot cip
- Industrial wastewater treatment effluent transfer
Related & Compare
Stage Configurations - Choose Your Model
The Grundfos CRN 3 series is available in multiple stage counts. More stages = higher pressure (head) at roughly the same flow rate (~18 GPM at the best efficiency point). Pick the configuration that matches your required discharge pressure:
| Model | Stages | Head @ BEP | Motor HP | Phase | Material Number |
|---|---|---|---|---|---|
| CRN 3-2 | 2 | ~110 ft (47 psi) | 1/3 HP | 3-phase | 99916626 |
| CRN 3-3 | 3 | ~165 ft (71 psi) | 1/2 HP | 3-phase | 99916627 |
| CRN 3-4 | 4 | ~220 ft (95 psi) | 3/4 HP | 3-phase | 99916628 |
| CRN 3-5 | 5 | ~275 ft (119 psi) | 3/4 HP | 3-phase | 99916629 |
| CRN 3-6 | 6 | ~330 ft (142 psi) | 1 HP | 3-phase | 99916630 |
| CRN 3-10 | 10 | ~550 ft (238 psi) | 2 HP | 3-phase | 99916634 |
| CRN 3-11 | 11 | ~605 ft (261 psi) | 2 HP | 3-phase | 99916635 |
| CRN 3-12 | 12 | ~660 ft (285 psi) | 2 HP | 3-phase | 99916636 |
Click any model to see full specifications, all available phase/voltage/seal variants, and request a quote. If you don't see your exact configuration, contact us — we can quote any of the 14,000+ Grundfos material numbers, not just those listed here.
Frequently Asked Questions
- What materials of construction are available for the CRN 3?
- All AISI 316L stainless steel wetted parts (head, base, chambers, impellers, shaft); FKM or EPDM elastomers
- What applications is the Grundfos CRN 3 suitable for?
- Reverse osmosis high-pressure feed, seawater pretreatment, chemical processing, ultrapure water, potable water boosting, food/beverage CIP, pharmaceutical water systems
- 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 CRN 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 CRN 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.
