GRUNDFOS · VERTICAL MULTISTAGE CENTRIFUGAL PUMP
CRN 45
Vertical multistage centrifugal pump in 316 stainless steel. 238 GPM rated flow at 60 Hz, 19 models from CRN 45-1-1 to CRN 45-8-1, 7 1/2 to 60 HP, TEFC or ODP motor, HQQE or HQQV cartridge seal, 3 in ANSI flanged ports.
238 GPM Rated Flow
Up to 957 ft Shut-off Head
7 1/2 to 60 HP
NSF/ANSI 61
316 Stainless Steel
Overview
Vertical, multistage centrifugal pump with suction and discharge ports on the same level, so it drops into a straight pipe run. All wetted parts — pump head, base, chambers, impellers and shaft — are 316 stainless steel (AISI 316). The cast iron flange rings and base plate do not touch the pumped liquid. CRN suits deionised, demineralised and other aggressive or high-purity water where 304 stainless is not enough.
The CRN 45 frame is rated at 238 GPM. The family number is Grundfos’s nominal duty in cubic metres per hour, not a GPM figure — size the pump from the performance table below, not from the model number.
19 models are offered, from CRN 45-1-1 to CRN 45-8-1, covering 7 1/2 to 60 HP on NEMA 213TC, 254TC, 284TC, 324TC, 364TC C-face motors (single-phase or three-phase; TEFC throughout the range, with ODP alternatives from 15 HP). Models with a -2 or -1 suffix use reduced-diameter impellers to trim head between full stage counts. Connections are 3 in ANSI flanges: 125/150 lb on 1 to 4-2 stages, 250/300 lb on 4-1 to 8 stages.
Genuine Grundfos equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial supplier.
What Ships and What It Needs to Run
Each part number is a complete pump: pump end, motor, coupling, coupling guard and cartridge shaft seal, factory assembled.
Not included: ANSI companion flanges (3 in) — order separately. Motor starter or VFD, overload protection, pressure switch or sensor, isolation valves, check valve and foundation bolts are also not included.
To run it needs: a supply matching the motor voltage and phase shown in the selected option, a correctly sized starter with overload protection, flooded suction or adequate NPSH, and a level, rigid foundation. These are fixed-speed pumps; for integrated variable-speed control see the CRE range.
Specifications
| Specification |
Value |
| Rated flow at 60 Hz |
238 GPM |
| Shut-off head range |
100 to 957 ft |
| Motor power range |
7 1/2 to 60 HP |
| Motors |
NEMA C-face, TEFC; ODP alternatives from 15 HP; service factor 1.15 |
| NEMA frames |
213TC, 254TC, 284TC, 324TC, 364TC |
| Frequency |
60 Hz, 2-pole (about 3,500 rpm) |
| Suction and discharge port |
3 in, in-line |
| Connection |
ANSI flanges — 125/150 lb on 1 to 4-2 stages, 250/300 lb on 4-1 to 8 stages |
| Maximum operating pressure |
232 psi on 1 to 4-2 stages; 435 psi on 4-1 to 8 stages |
| Liquid temperature range |
−40 °F to 248 °F with HQQE; −4 °F to 194 °F with HQQV |
| Maximum ambient temperature |
104 °F |
| Pump orientation |
Vertical |
| Approvals |
NSF/ANSI 61 (drinking water), cURus |
| Curve tolerance |
ISO 9906:2012 grade 3B |
Performance — Will It Do What You Need
Find the head you need in feet at your flow and pick the first model that meets it. Points are read from the Grundfos 60 Hz curve for each model at 20%, 50% and 75% of its maximum flow; shut-off is the head at zero flow, not a working point.
Performance table — all models
| Model |
HP |
20% flow |
50% flow |
75% flow |
Shut-off head |
| CRN 45-1-1 |
7 1/2 |
62 gpm · 100 ft |
156 gpm · 92 ft |
234 gpm · 72 ft |
100 ft |
| CRN 45-1 |
10 |
62 gpm · 123 ft |
156 gpm · 109 ft |
234 gpm · 92 ft |
126 ft |
| CRN 45-2-2 |
15 |
62 gpm · 201 ft |
156 gpm · 187 ft |
234 gpm · 149 ft |
196 ft |
| CRN 45-2-1 |
15 |
62 gpm · 222 ft |
156 gpm · 203 ft |
234 gpm · 168 ft |
222 ft |
| CRN 45-2 |
15 |
62 gpm · 244 ft |
156 gpm · 219 ft |
234 gpm · 186 ft |
246 ft |
| CRN 45-3-2 |
20 |
62 gpm · 321 ft |
156 gpm · 296 ft |
234 gpm · 243 ft |
316 ft |
| CRN 45-3-1 |
25 |
62 gpm · 346 ft |
156 gpm · 317 ft |
234 gpm · 266 ft |
344 ft |
| CRN 45-3 |
25 |
62 gpm · 368 ft |
156 gpm · 333 ft |
234 gpm · 283 ft |
369 ft |
| CRN 45-4-2 |
30 |
62 gpm · 446 ft |
156 gpm · 411 ft |
234 gpm · 342 ft |
440 ft |
| CRN 45-4-1 |
30 |
62 gpm · 468 ft |
156 gpm · 428 ft |
234 gpm · 360 ft |
465 ft |
| CRN 45-4 |
30 |
62 gpm · 490 ft |
156 gpm · 444 ft |
234 gpm · 378 ft |
491 ft |
| CRN 45-5-2 |
40 |
62 gpm · 573 ft |
156 gpm · 528 ft |
234 gpm · 443 ft |
565 ft |
| CRN 45-5-1 |
40 |
62 gpm · 595 ft |
156 gpm · 546 ft |
234 gpm · 462 ft |
590 ft |
| CRN 45-5 |
40 |
62 gpm · 618 ft |
156 gpm · 562 ft |
234 gpm · 480 ft |
616 ft |
| CRN 45-6-2 |
50 |
62 gpm · 695 ft |
156 gpm · 641 ft |
234 gpm · 539 ft |
685 ft |
| CRN 45-6 |
50 |
62 gpm · 740 ft |
156 gpm · 674 ft |
234 gpm · 576 ft |
739 ft |
| CRN 45-7-2 |
50 |
62 gpm · 815 ft |
156 gpm · 750 ft |
234 gpm · 633 ft |
806 ft |
| CRN 45-7 |
60 |
62 gpm · 864 ft |
156 gpm · 790 ft |
234 gpm · 676 ft |
862 ft |
| CRN 45-8-1 |
60 |
62 gpm · 966 ft |
156 gpm · 885 ft |
233 gpm · 753 ft |
957 ft |
Read from Grundfos published 60 Hz curves (water at 68 °F); actual head varies slightly with motor speed. For a duty between two models, email us and we will size it against the full curve.
Materials
| Component |
Material |
| Pump head and base |
Stainless steel AISI 316 (cast iron flange rings and base plate, not wetted) |
| Chambers and impellers |
Stainless steel AISI 316 |
| Shaft |
Stainless steel AISI 316 |
| Shaft seal faces |
Silicon carbide / silicon carbide |
| Seal and gasket rubber |
EPDM (HQQE) or FKM (HQQV) |
| Bearing |
Silicon carbide |
-
HQQE — EPDM. Silicon-carbide faces with EPDM rubber, −40 °F to 248 °F. The standard water seal: potable water, hot water and glycol. Not for mineral oils.
-
HQQV — FKM (Viton). Silicon-carbide faces with FKM rubber, −4 °F to 194 °F. For mineral oils, fuels and liquids that attack EPDM.
Before You BuyConfirm the duty point against the performance table, and confirm horsepower, voltage, phase and motor enclosure (TEFC or ODP) against your site. Single-phase and three-phase units are not interchangeable. Check that liquid temperature and system pressure sit inside the limits for the seal and flange rating selected, and order 3 in ANSI companion flanges separately.
