GRUNDFOS · VERTICAL MULTISTAGE CENTRIFUGAL PUMP
CRN 155
Vertical multistage centrifugal pump in 316 stainless steel. 820 GPM rated flow at 60 Hz, 19 models from CRN 155-1-1 to CRN 155-8-3, 25 to 250 HP, TEFC motor, HQQE or HQQV cartridge seal, 6 in ANSI flanged or Victaulic ports.
820 GPM Rated Flow
Up to 1,313 ft Shut-off Head
25 to 250 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. Pump head and base are cast 316 stainless steel (ASTM A351 CF8M) with AISI 316 chambers, impellers and shaft; the cast iron loose flange rings and base plate do not touch the pumped liquid.
The CRN 155 frame is rated at 820 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 155-1-1 to CRN 155-8-3, covering 25 to 250 HP on NEMA C-face TEFC motors (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 6 in ANSI flanges (150 lb or 300 lb class, by model), or 6 in Victaulic-type grooved couplings.
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 or Victaulic couplings (6 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. Grundfos requires the 100, 125, 150, 200, 250 HP models to be started through a soft starter or variable speed drive. These are fixed-speed pumps; for integrated variable-speed control see the CRE range.
Specifications
| Specification |
Value |
| Rated flow at 60 Hz |
820 GPM |
| Shut-off head range |
147 to 1,313 ft |
| Motor power range |
25 to 250 HP |
| Motors |
NEMA C-face, TEFC, 2-pole, service factor 1.25 |
| NEMA frames |
284TSC, 324TSC, 326TSC, 364TSC, 365TSC, 405TSD, 444TSD, 445TSD, 447TSD |
| Frequency |
60 Hz, 2-pole (about 3,500 rpm) |
| Suction and discharge port |
6 in, in-line |
| Connection |
6 in ANSI flanges (150 lb or 300 lb class, by model), or 6 in Victaulic-type grooved couplings |
| Maximum operating pressure |
232 psi / 363 psi / 580 psi depending on model and connection |
| Liquid temperature range |
−4 °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 |
| 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 155-1-1 |
25 |
213 gpm · 148 ft |
532 gpm · 129 ft |
797 gpm · 93 ft |
147 ft |
| CRN 155-1 |
40 |
214 gpm · 177 ft |
536 gpm · 162 ft |
803 gpm · 130 ft |
178 ft |
| CRN 155-2-2 |
50 |
214 gpm · 287 ft |
534 gpm · 259 ft |
802 gpm · 186 ft |
288 ft |
| CRN 155-2-1 |
60 |
214 gpm · 313 ft |
536 gpm · 291 ft |
804 gpm · 224 ft |
322 ft |
| CRN 155-2 |
75 |
214 gpm · 344 ft |
536 gpm · 323 ft |
803 gpm · 264 ft |
358 ft |
| CRN 155-3-2 |
75 |
214 gpm · 450 ft |
534 gpm · 418 ft |
802 gpm · 314 ft |
461 ft |
| CRN 155-3-1 |
100 |
214 gpm · 481 ft |
534 gpm · 451 ft |
802 gpm · 355 ft |
498 ft |
| CRN 155-3 |
100 |
213 gpm · 512 ft |
533 gpm · 483 ft |
800 gpm · 394 ft |
532 ft |
| CRN 155-4-2 |
125 |
215 gpm · 624 ft |
538 gpm · 586 ft |
806 gpm · 452 ft |
640 ft |
| CRN 155-4-1 |
125 |
215 gpm · 654 ft |
536 gpm · 617 ft |
805 gpm · 491 ft |
676 ft |
| CRN 155-4 |
125 |
214 gpm · 685 ft |
536 gpm · 650 ft |
804 gpm · 532 ft |
712 ft |
| CRN 155-5-2 |
150 |
215 gpm · 794 ft |
538 gpm · 748 ft |
806 gpm · 585 ft |
817 ft |
| CRN 155-5-1 |
150 |
215 gpm · 824 ft |
536 gpm · 780 ft |
805 gpm · 624 ft |
852 ft |
| CRN 155-5 |
200 |
215 gpm · 859 ft |
538 gpm · 817 ft |
807 gpm · 668 ft |
889 ft |
| CRN 155-6-2 |
200 |
215 gpm · 966 ft |
537 gpm · 913 ft |
806 gpm · 721 ft |
996 ft |
| CRN 155-6 |
200 |
214 gpm · 1,028 ft |
536 gpm · 977 ft |
804 gpm · 802 ft |
1,066 ft |
| CRN 155-7-2 |
200 |
214 gpm · 1,136 ft |
536 gpm · 1,076 ft |
804 gpm · 853 ft |
1,170 ft |
| CRN 155-7 |
250 |
215 gpm · 1,201 ft |
537 gpm · 1,144 ft |
806 gpm · 938 ft |
1,246 ft |
| CRN 155-8-3 |
250 |
215 gpm · 1,277 ft |
537 gpm · 1,209 ft |
806 gpm · 949 ft |
1,313 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 (ASTM A351 CF8M); 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, −4 °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 and motor enclosure against your site. Check that liquid temperature and system pressure sit inside the limits for the seal and connection selected, and order 6 in ANSI companion flanges or Victaulic couplings separately.
