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files/Grundfos_CRN_64_Vertical_Multistage_Pump_56f828ca-2652-4b58-b1ed-eac51365fda2.png
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Vertical, multistage centrifugal pump with suction and discharge ports on the same level, so it drops into a straight pipe run. All wetted parts are 316 stainless steel (AISI 316); the cast iron flange rings and base plate do not touch the pumped liquid.
The CRN 64 frame is rated at 339 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.
12 models are offered, from CRN 64-1-1 to CRN 64-5-2, covering 10 to 60 HP on NEMA C-face ODP and TEFC motors (single-phase or three-phase). Models with a -1, -2 or -3 suffix use that many reduced-diameter impellers to trim head between full stage counts. Connections are 4 in ANSI flanges: 125/150 lb on 1 to 3 stages, 250/300 lb on 4 and 5 stages.
Each part number is a complete pump: pump end, motor, coupling, coupling guard and cartridge shaft seal, factory assembled.
Not included: ANSI companion flanges (4 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 three-phase supply matching the motor voltage 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.
| Specification | Value |
|---|---|
| Rated flow at 60 Hz | 339 GPM |
| Shut-off head range | 109 to 609 ft |
| Motor power range | 10 to 60 HP |
| Motors | NEMA C-face, ODP or TEFC, 2-pole, service factor 1.15 |
| NEMA frames | 213TC, 254TC, 284TC, 324TC, 364TC |
| Frequency | 60 Hz, 2-pole (about 3,500 rpm) |
| Suction and discharge port | 4 in, in-line |
| Connection | 4 in ANSI flanges: 125/150 lb on 1 to 3 stages, 250/300 lb on 4 and 5 stages |
| Maximum operating pressure | 232 psi / 435 psi depending on model and connection |
| 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 (HQQE seal versions), NSF/ANSI 372, cURus |
| Curve tolerance | ISO 9906:2012 grade 3B |
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.
| Model | HP | 20% flow | 50% flow | 75% flow | Shut-off head |
|---|---|---|---|---|---|
| CRN 64-1-1 | 10 | 91 gpm · 104 ft | 228 gpm · 91 ft | 341 gpm · 71 ft | 109 ft |
| CRN 64-1 | 15 | 91 gpm · 141 ft | 227 gpm · 118 ft | 340 gpm · 102 ft | 154 ft |
| CRN 64-2-2 | 20 | 91 gpm · 197 ft | 227 gpm · 182 ft | 340 gpm · 144 ft | 198 ft |
| CRN 64-2-1 | 20 | 90 gpm · 233 ft | 226 gpm · 209 ft | 338 gpm · 174 ft | 242 ft |
| CRN 64-2 | 25 | 91 gpm · 276 ft | 227 gpm · 245 ft | 340 gpm · 211 ft | 290 ft |
| CRN 64-3-2 | 30 | 91 gpm · 329 ft | 227 gpm · 302 ft | 340 gpm · 249 ft | 332 ft |
| CRN 64-3-1 | 40 | 92 gpm · 373 ft | 229 gpm · 341 ft | 344 gpm · 288 ft | 381 ft |
| CRN 64-3 | 40 | 91 gpm · 414 ft | 228 gpm · 375 ft | 343 gpm · 323 ft | 428 ft |
| CRN 64-4-2 | 40 | 91 gpm · 466 ft | 228 gpm · 433 ft | 342 gpm · 361 ft | 470 ft |
| CRN 64-4-1 | 50 | 91 gpm · 508 ft | 228 gpm · 467 ft | 342 gpm · 397 ft | 518 ft |
| CRN 64-4 | 50 | 91 gpm · 549 ft | 228 gpm · 501 ft | 342 gpm · 431 ft | 565 ft |
| CRN 64-5-2 | 60 | 92 gpm · 606 ft | 229 gpm · 564 ft | 344 gpm · 474 ft | 609 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.
| 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 |
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