Grundfos CRN 20-4 — material number 99917890 — is a 4-stage Grundfos CRN vertical multistage centrifugal pump with a 10 HP, 3-phase, 208-230/460 V NEMA TEFC motor and a HQQE shaft seal.
The 4-stage build delivers 380 ft of head (115 GPM, ~164 psi) at the BEP and a 456 ft shutoff — the typical pick for mid-rise pressure boosting, RO pretreatment, and cooling-tower makeup.
Specifications
| Model | CRN 20-4 |
| Stages | 4 |
| Flow at BEP | 115 GPM |
| Head at BEP | 380 ft (~164 psi) |
| Shutoff head (approx.) | 456 ft |
| Motor | 10 HP, 3-phase, 208-230/460 V, NEMA TEFC on 213TC frame |
| Shaft seal | HQQE (SiC/Carbon EPDM) |
| Materials | All AISI 316L stainless steel wetted parts |
| Material number (P/N) | 99917890 |
| Shipping weight | 225 lbs |
| Frequency | 60 Hz |
| Brand | Grundfos |
| Country of origin | Denmark / USA (varies by date code) |
Dimensions
| Approximate dimensions (vertical pump) | |
|---|---|
| Overall height (pump + motor) | 42.7 in |
| Pump body height (4 stages) | 30.7 in |
| Base height (stage 0) | 17.5 in |
| Added height per stage | 3.3 in |
| Motor frame | See spec table above |
| Mounting | Vertical foot-mounted |
| Motor orientation | Vertical with NEMA motor stool above pump head |
Note: Dimensions are approximate and based on the Grundfos CRN 20 data booklet. Exact dimensions vary slightly by motor frame and base style. For certified installation drawings of this specific material number, request a quote and we'll provide the official Grundfos dimensional drawing.
Pipe Connections
The Grundfos CRN 20 series is available with multiple connection types to match your installation requirements. Connection sizes for this series:
| Connection options | |
|---|---|
| Victaulic / PJE coupling | 2 inch PJE coupling (Victaulic-type) |
| ANSI flange size | 2 inch |
| ANSI flange class | 300 lb |
| Inlet / outlet orientation | Suction and discharge on the same horizontal centerline (in-line) |
Companion connections (gaskets, bolts, ANSI flanges or Victaulic couplings) are ordered separately. Contact ForeverPure for the matched connection kit part numbers for your specific configuration.
Available Configurations / Material Numbers
The CRN 20-4 ships in several phase, voltage, and seal combinations. Material numbers for the most common variants:
| Phase / Voltage | Seal | Motor HP | Weight | Material Number |
|---|---|---|---|---|
| 1-phase, 230 | HQQE | 10 HP | 348 lbs | 99917864 |
| 3-phase, 208-230/460 | HQQE | 10 HP | 225 lbs | 99917890 |
| 1-phase, 230 | HQQV | 10 HP | 348 lbs | 99917868 |
| 3-phase, 208-230/460 | HQQV | 10 HP | 225 lbs | 99917899 |
| 1-phase, 230 | HQQE | 10 HP | 337 lbs | 99917856 |
| 3-phase, 208-230/460 | HQQE | 10 HP | 214 lbs | 99917872 |
| 1-phase, 230 | HQQV | 10 HP | 337 lbs | 99917860 |
| 3-phase, 208-230/460 | HQQV | 10 HP | 214 lbs | 99917881 |
Typical Applications
- Seawater reverse osmosis (SWRO) high-pressure feed
- Brackish water RO and booster
- Ultrapure water (UPW) for semiconductor fabs
- Pharmaceutical purified water (USP) loops
- Chloride-bearing chemical transfer
- Food-grade hot CIP
Datasheet & Documentation
- Grundfos CR/CRI/CRN North America Data Booklet (PDF)
- CR/CRI/CRN/CRT Installation & Operating Instructions (PDF)
- CR Service Manual (PDF)
Frequently Asked Questions
- What is the maximum head/flow of the Grundfos CRN 20-4?
- The CRN 20-4 produces approximately 380 ft of head at 115 GPM (best efficiency point), with a shutoff head of about 456 ft. That corresponds to roughly 164 psi at the BEP.
- What is the Grundfos CRN 20-4 material number / part number?
- The primary material number for this configuration (3-phase 208-230/460, HQQE seal) is 99917890. Other voltage and seal options are listed in the variants table on this page.
- Which motor does the Grundfos CRN 20-4 use?
- This SKU ships with a 10 HP, 3-phase, 208-230/460 V NEMA TEFC motor on a 213TC frame. Other motor configurations and IE3/IE5 upgrades are available on request.
- Can the Grundfos CRN 20-4 be paired with a variable frequency drive (VFD)?
- Yes. Order the matching E-Pump variant with integrated MLE permanent-magnet motor, or pair this fixed-speed pump with a Grundfos CUE external VFD.
- What is the typical lead time for the Grundfos CRN 20-4?
- Many configurations of the CRN 20 series ship from stock through Grundfos USA. Contact ForeverPure Place for the current lead time on this specific material number (99917890).
Related Products
- Browse all Grundfos CRN 20 stage configurations
- All CR, CRI, CRN vertical multistage pumps
- Complete Grundfos catalog
