Menu
Your cart is empty
Looks like you haven't added anything to your cart yet
Grundfos CRE Variable-Speed Multistage Pumps
Grundfos CRE 5 Variable-Speed Pump, 1 1/4 in NPT, 4000 rpm
Grundfos
Grundfos CRE 5 Variable-Speed Pump, 1 1/4 in NPT, 4000 rpm
- Price
- From $2,860
Grundfos CRE 5 Variable-Speed Pump, 1 1/4 in NPT, 3600 rpm
Grundfos
Grundfos CRE 5 Variable-Speed Pump, 1 1/4 in NPT, 3600 rpm
- Price
- From $2,860
Grundfos CRE 5 Variable-Speed Pump, 1 1/4 in ANSI, 4000 rpm
Grundfos
Grundfos CRE 5 Variable-Speed Pump, 1 1/4 in ANSI, 4000 rpm
- Price
- From $2,927.34
Grundfos CRE 5 Variable-Speed Pump, 1 1/4 in ANSI, 3600 rpm
Grundfos
Grundfos CRE 5 Variable-Speed Pump, 1 1/4 in ANSI, 3600 rpm
- Price
- From $2,927.34
Grundfos CRE 3 Variable-Speed Pump, 1 in NPT, 4000 rpm
Grundfos
Grundfos CRE 3 Variable-Speed Pump, 1 in NPT, 4000 rpm
- Price
- From $2,724.67
Grundfos CRE 3 Variable-Speed Pump, 1 in NPT, 3600 rpm
Grundfos
Grundfos CRE 3 Variable-Speed Pump, 1 in NPT, 3600 rpm
- Price
- From $2,724.67
Grundfos CRE 3 Variable-Speed Pump, 1 1/4 in ANSI, 4000 rpm
Grundfos
Grundfos CRE 3 Variable-Speed Pump, 1 1/4 in ANSI, 4000 rpm
- Price
- From $2,794.67
Grundfos CRE 3 Variable-Speed Pump, 1 1/4 in ANSI, 3600 rpm
Grundfos
Grundfos CRE 3 Variable-Speed Pump, 1 1/4 in ANSI, 3600 rpm
- Price
- From $1,850
Grundfos CRE 10 Variable-Speed Pump, 2 in NPT, 4000 rpm
Grundfos
Grundfos CRE 10 Variable-Speed Pump, 2 in NPT, 4000 rpm
- Price
- From $3,891.34
Grundfos CRE 10 Variable-Speed Pump, 2 in NPT, 3600 rpm
Grundfos
Grundfos CRE 10 Variable-Speed Pump, 2 in NPT, 3600 rpm
- Price
- From $3,891.34
Grundfos CRE 10 Variable-Speed Pump, 2 in ANSI, 4000 rpm
Grundfos
Grundfos CRE 10 Variable-Speed Pump, 2 in ANSI, 4000 rpm
- Price
- From $3,891.34
Grundfos CRE 10 Variable-Speed Pump, 2 in ANSI, 3600 rpm
Grundfos
Grundfos CRE 10 Variable-Speed Pump, 2 in ANSI, 3600 rpm
- Price
- From $3,891.34
Grundfos CRE Variable-Speed Multistage Pumps
Grundfos CRE Variable-Speed Multistage Pumps
Vertical multistage pumps with the variable-speed drive built into the motor. One unit holds a pressure setpoint across a swinging demand, with no throttling valve, no separate drive panel and no wiring between them.
494part numbers
15.5-51.6GPM rated flow
840 ftmaximum head
3600 & 4000rated speeds
65model and speed pairs
Constant Pressure From The Pump Itself
Grundfos builds the CR vertical multistage platform in Denmark and Kansas, and the CRE is that platform with an MLE motor on top: a permanent-magnet motor with the frequency converter integrated into its terminal box, plus the control panel and function module that let it hold a setpoint. Because an MLE motor is not tied to the 3600 rpm a two-pole induction motor turns on 60 Hz, Grundfos publishes a second set of part numbers rated at 4000 rpm, which reach further up the head and flow range on the same hydraulics.
We supply the full CRE 3, CRE 5 and CRE 10 range in the correct US 60 Hz build — 494 part numbers across 3 frames, two connection styles, two rated speeds and with-sensor or without-sensor versions. Send us the flow, the required boost, the inlet pressure and the available voltage and we will size it against the published Grundfos curve and give you the part number, the sensor span and the lead time — call 1-888.510.4036.
Genuine Grundfos equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial supplier.
The CRE Range
Three frames. Each is listed four ways — NPT or ANSI connections, 3600 or 4000 rpm — because the connection changes the pressure rating and the speed changes the published curve.
CRE 3
15.5 GPM at 3600 rpm, 17.6 GPM at 4000 rpm
15.5-17.6 GPMrated flow
48-646 ftrated head
1/2 to 5 HPmotor range
232 psi / 362 psiNPT / ANSI
Vertical multistage pump with an integrated MLE variable-speed motor, rated 15.5 GPM at 3600 rpm and 17.6 GPM at 4000 rpm. 11 stage configurations at 3600 rpm and 12 at 4000 rpm, from CRE 3-2 upward. Rated head reaches 646 ft, with shut-off to 840 ft on the tallest stack.
Key specifications
- Rated flow 15.5 GPM at 3600 rpm, 17.6 GPM at 4000 rpm
- 1/2 to 5 HP (P2), MLE motor with the drive built in
- 1 in Oval / NPT(F) rated PN 16, 232 psi; 1 1/4 in ANSI 250 lb rated PN 25, 362 psi
- HQQE cartridge seal, silicon carbide faces
- With-sensor and without-sensor part numbers; sensor spans 0-145, 0-232, 0-362, 0-580 psi
- 162 part numbers; shipping weight 63-172 lb
Best forConstant-pressure boosting on small commercial buildings, boiler feed and dosing skids around 16 GPM, and any duty where the demand swings and a fixed-speed pump would spend its life against a throttled valve.
CRE 5
27.3 GPM at 3600 rpm, 29.6 GPM at 4000 rpm
27.3-29.6 GPMrated flow
49-612 ftrated head
3/4 to 7-1/2 HPmotor range
232 psi / 362 psiNPT / ANSI
Vertical multistage pump with an integrated MLE variable-speed motor, rated 27.3 GPM at 3600 rpm and 29.6 GPM at 4000 rpm. 10 stage configurations at 3600 rpm and 11 at 4000 rpm, from CRE 5-2 upward. Rated head reaches 612 ft, with shut-off to 826 ft on the tallest stack.
Key specifications
- Rated flow 27.3 GPM at 3600 rpm, 29.6 GPM at 4000 rpm
- 3/4 to 7-1/2 HP (P2), MLE motor with the drive built in
- 1 1/4 in Oval / NPT(F) rated PN 16, 232 psi; 1 1/4 in ANSI 250 lb rated PN 25, 362 psi
- HQQE cartridge seal, silicon carbide faces
- With-sensor and without-sensor part numbers; sensor spans 0-145, 0-232, 0-362, 0-580 psi
- 176 part numbers; shipping weight 63-303 lb
Best forMid-size building boosting, process water and washdown loops around 28 GPM, and multi-outlet systems where holding one pressure through a wide flow range matters more than peak efficiency at one point.
CRE 10
45.9 GPM at 3600 rpm, 51.6 GPM at 4000 rpm
45.9-51.6 GPMrated flow
38-642 ftrated head
1 to 15 HPmotor range
232 psi / 232-362 psiNPT / ANSI
Vertical multistage pump with an integrated MLE variable-speed motor, rated 45.9 GPM at 3600 rpm and 51.6 GPM at 4000 rpm. 9 stage configurations at 3600 rpm and 12 at 4000 rpm, from CRE 10-1 upward. Rated head reaches 642 ft, with shut-off to 802 ft on the tallest stack.
Key specifications
- Rated flow 45.9 GPM at 3600 rpm, 51.6 GPM at 4000 rpm
- 1 to 15 HP (P2), MLE motor with the drive built in
- 2 in Oval / NPT(F) rated PN 16, 232 psi; 2 in ANSI 250 lb rated PN 25, 232-362 psi
- HQQE cartridge seal, silicon carbide faces
- With-sensor and without-sensor part numbers; sensor spans 0-87, 0-145, 0-232, 0-362, 0-580 psi
- 156 part numbers; shipping weight 108-519 lb
Best forLarger building and campus boosting, cooling and process transfer around 50 GPM, and retrofits replacing a fixed-speed pump and control valve with one unit that holds setpoint on its own.
CRE 3 vs CRE 5 vs CRE 10
Pick the frame on flow, then the stack on head. Frame decides how much water; stages decide how hard it pushes.
| CRE 3 | CRE 5 | CRE 10 | |
|---|---|---|---|
| Rated flow, 3600 rpm | 15.5 GPM | 27.3 GPM | 45.9 GPM |
| Rated flow, 4000 rpm | 17.6 GPM | 29.6 GPM | 51.6 GPM |
| Rated head range | 48-646 ft | 49-612 ft | 38-642 ft |
| Maximum head | 840 ft | 826 ft | 802 ft |
| Motor range (P2) | 1/2 to 5 HP | 3/4 to 7-1/2 HP | 1 to 15 HP |
| NPT port / rating | 1 in · 232 psi | 1 1/4 in · 232 psi | 2 in · 232 psi |
| ANSI port / rating | 1 1/4 in · 362 psi | 1 1/4 in · 362 psi | 2 in · 232-362 psi |
| Sensor spans offered | 0-145, 0-232, 0-362, 0-580 psi | 0-145, 0-232, 0-362, 0-580 psi | 0-87, 0-145, 0-232, 0-362, 0-580 psi |
| Shipping weight | 63-172 lb | 63-303 lb | 108-519 lb |
| Part numbers | 162 | 176 | 156 |
Quick rule. Match the frame to the flow you need at the busiest moment, then choose the stack that covers the boost. Going up a frame to cure weak pressure at a single outlet is the usual mis-buy — that is a head problem, and a taller stack in the same frame fixes it for less money and less motor.
Published Duty Points
Rated flow, rated head, maximum head and motor power as Grundfos publishes them for the US 60 Hz build, at both rated speeds. These are the nominal figures, not a curve.
| Model | Rated speed (rpm) | Rated flow (GPM) | Rated head (ft) | Max head (ft) | P2 (kW) |
|---|---|---|---|---|---|
| CRE 3-2 | 3600 | 15.5 | 48 | 62 | 0.5 |
| CRE 3-4 | 3600 | 15.7 | 93 | 125 | 0.75 |
| CRE 3-5 | 3600 | 15.8 | 117 | 157 | 1 |
| CRE 3-6 | 3600 | 15.9 | 143 | 190 | 1 |
| CRE 3-8 | 3600 | 15.7 | 186 | 251 | 1.5 |
| CRE 3-9 | 3600 | 15.9 | 214 | 285 | 1.5 |
| CRE 3-11 | 3600 | 15.4 | 252 | 343 | 2 |
| CRE 3-12 | 3600 | 15.9 | 285 | 381 | 2 |
| CRE 3-15 | 3600 | 16 | 358 | 477 | 3 |
| CRE 3-17 | 3600 | 15.9 | 404 | 540 | 3 |
| CRE 3-25 | 3600 | 15.8 | 580 | 786 | 5 |
| CRE 3-2 | 4000 | 17.6 | 62 | 79 | 0.5 |
| CRE 3-3 | 4000 | 17.7 | 93 | 119 | 0.75 |
| CRE 3-4 | 4000 | 16.3 | 101 | 160 | 0.75 |
| CRE 3-5 | 4000 | 16.9 | 134 | 200 | 1 |
| CRE 3-6 | 4000 | 18.1 | 184 | 240 | 1.5 |
| CRE 3-8 | 4000 | 16.5 | 203 | 320 | 1.5 |
| CRE 3-9 | 4000 | 16.6 | 232 | 360 | 1.5 |
| CRE 3-11 | 4000 | 16.4 | 278 | 440 | 2 |
| CRE 3-12 | 4000 | 16.7 | 315 | 480 | 2 |
| CRE 3-15 | 4000 | 17.7 | 438 | 600 | 3 |
| CRE 3-17 | 4000 | 17 | 457 | 680 | 3 |
| CRE 3-21 | 4000 | 18.1 | 646 | 840 | 5 |
| CRE 5-2 | 3600 | 27.3 | 49 | 66 | 0.75 |
| CRE 5-3 | 3600 | 29.1 | 75 | 99 | 1 |
| CRE 5-4 | 3600 | 29.3 | 98 | 131 | 1.5 |
| CRE 5-5 | 3600 | 30.4 | 115 | 164 | 2 |
| CRE 5-6 | 3600 | 30.6 | 149 | 198 | 2 |
| CRE 5-9 | 3600 | 31 | 223 | 296 | 3 |
| CRE 5-13 | 3600 | 31.2 | 314 | 424 | 5 |
| CRE 5-16 | 3600 | 31.4 | 378 | 519 | 5 |
| CRE 5-20 | 3600 | 32.1 | 494 | 659 | 7.5 |
| CRE 5-24 | 3600 | 31.9 | 589 | 789 | 7.5 |
| CRE 5-2 | 4000 | 29.6 | 59 | 83 | 0.75 |
| CRE 5-3 | 4000 | 32.7 | 98 | 124 | 1.5 |
| CRE 5-4 | 4000 | 31.8 | 115 | 166 | 1.5 |
| CRE 5-5 | 4000 | 33.2 | 151 | 207 | 2 |
| CRE 5-6 | 4000 | 33.2 | 175 | 248 | 2 |
| CRE 5-7 | 4000 | 35.3 | 223 | 290 | 3 |
| CRE 5-9 | 4000 | 33.4 | 258 | 372 | 3 |
| CRE 5-11 | 4000 | 35.8 | 350 | 455 | 5 |
| CRE 5-13 | 4000 | 35.6 | 410 | 537 | 5 |
| CRE 5-16 | 4000 | 33.7 | 435 | 661 | 5 |
| CRE 5-20 | 4000 | 35.7 | 612 | 826 | 7.5 |
| CRE 10-1 | 3600 | 45.9 | 38 | 47 | 1 |
| CRE 10-2 | 3600 | 48.7 | 76 | 99 | 2 |
| CRE 10-4 | 3600 | 52.6 | 151 | 192 | 3 |
| CRE 10-6 | 3600 | 52.4 | 219 | 284 | 5 |
| CRE 10-8 | 3600 | 53.7 | 307 | 386 | 7.5 |
| CRE 10-10 | 3600 | 53.3 | 380 | 480 | 7.5 |
| CRE 10-12 | 3600 | 54.2 | 455 | 578 | 10 |
| CRE 10-14 | 3600 | 54.6 | 534 | 677 | 15 |
| CRE 10-17 | 3600 | 53 | 596 | 802 | 15 |
| CRE 10-1 | 4000 | 51.6 | 48 | 59 | 1 |
| CRE 10-2 | 4000 | 54.2 | 95 | 121 | 2 |
| CRE 10-3 | 4000 | 58.8 | 148 | 181 | 3 |
| CRE 10-4 | 4000 | 54.9 | 165 | 242 | 3 |
| CRE 10-5 | 4000 | 61.2 | 248 | 303 | 5 |
| CRE 10-6 | 4000 | 57.9 | 268 | 364 | 5 |
| CRE 10-7 | 4000 | 61.2 | 349 | 424 | 7.5 |
| CRE 10-8 | 4000 | 60.1 | 384 | 485 | 7.5 |
| CRE 10-9 | 4000 | 61.2 | 449 | 545 | 10 |
| CRE 10-10 | 4000 | 55.6 | 412 | 606 | 7.5 |
| CRE 10-12 | 4000 | 58.5 | 530 | 729 | 10 |
| CRE 10-13 | 4000 | 62 | 642 | 789 | 15 |
Reading these figures. Head is stated in feet; divide by 2.31 for psi, or multiply psi by 2.31 for feet. Elevation costs 0.433 psi per foot of lift. Every figure here is the nominal duty point — for the flow and head at a specific point on the curve, request the manufacturer curve for the part number and we will send it.
Sizing a CRE
A pump curve plots what the pump adds to the pressure already at its inlet. Size on the boost required, never on the pressure wanted.
- Find the peak flow. For residential, count water supply fixture units and convert with the Hunter curve in IPC Table 604.3. For light commercial, use the IAPMO Water Demand Calculator. Guessing high here is the most expensive mistake in the exercise.
- Work out the required boost. Required boost = target pressure at the highest fixture + 0.433 psi per foot of elevation + friction loss through pipe, fittings and any treatment − the inlet pressure you can count on at peak demand.
- Worked example. A four-storey building wants 45 psi at the top fixture, 42 ft above the pump. Friction through the riser and meter is 8 psi. The city main holds 35 psi at peak. Required boost = 45 + (42 × 0.433) + 8 − 35 = 36.2 psi, which is 84 ft of head. At 30 GPM that lands inside CRE 5.
- Check the inlet, not just the outlet. On a tank fed by gravity the inlet contributes almost nothing and the curve is close to what you get. On a city main the standing pressure adds to whatever the pump produces, so the same pump gives a very different outlet pressure on the two systems.
- Check the setpoint against two ceilings. The sensor span is the range the controller can be told to hold, not a pressure the pump can reach. Confirm the pump produces the setpoint on top of your inlet pressure, and confirm the setpoint sits under the body rating for the connection you are buying — 232 psi on the NPT builds, up to 362 psi on ANSI.
- Decide sensor or no sensor. Take a with-sensor part number if the pump is holding pressure on its own. Take a without-sensor part number only if a transmitter, a BMS or an external controller is already feeding it a signal.
- Confirm the electrical supply. Voltage and phase are fixed per part number on an MLE motor — there is no terminal-board changeover as on a fixed-speed CR, and single-phase and three-phase units are not interchangeable.
The 70 percent rule. If the duty point sits above about 70 percent of a model's maximum head, step up to the next stack. It leaves room for pipe scaling, a dirty strainer and the day the inlet pressure sags, and it keeps the pump off the flat end of its curve where small pressure changes cause large flow swings.
Selection Guide
A starting point, not a substitute for sizing. Send us the numbers and we will confirm the part number.
| Application | Typical demand | Start with | Notes |
|---|---|---|---|
| Small commercial building boosting | 10-18 GPM | CRE 3, 4000 rpm | With sensor. The 4000 rpm build reaches 646 ft against 580 ft at 3600 rpm. |
| Boiler feed and dosing skids | 12-17 GPM | CRE 3, ANSI | ANSI 250 lb flanges rated 362 psi where the system runs above the 232 psi NPT limit. |
| Mid-size building, multi-outlet | 22-30 GPM | CRE 5, 4000 rpm | With sensor. Holds one pressure through a wide flow swing without a control valve. |
| Process water and washdown | 25-30 GPM | CRE 5 | Check liquid temperature and cleaning chemistry against the HQQE seal before ordering. |
| Campus or large building boosting | 40-52 GPM | CRE 10, 4000 rpm | With sensor. Confirm the ANSI rating on shorter stacks — 232-362 psi across the range. |
| Cooling and process transfer | 45-52 GPM | CRE 10 | Steady duty. A fixed-speed CR may cost less if the flow genuinely does not vary. |
| Retrofit replacing pump plus control valve | Any | CRE, with sensor | One unit replaces the pump, the throttling valve and the separate drive panel. |
| BMS-controlled system | Any | CRE, without sensor | Only where the external signal already exists. The part numbers are not interchangeable. |
What The MLE Motor Brings
The Drive Is On The Motor
The frequency converter is integrated into the motor terminal box rather than sitting in a separate panel. That removes the drive enclosure, its wall space and the motor cable run between them, and it removes the commissioning step where a generic drive has to be told what motor it is driving.
It Holds A Setpoint
With a pressure sensor fitted, the pump varies its own speed to keep the outlet at the pressure you set as demand moves. No throttling valve burning energy across a restriction, and no pressure swing at the fixture when a second outlet opens.
4000 rpm Is Real Extra Range
A two-pole induction motor is stuck near 3600 rpm on 60 Hz. An MLE motor is not, so Grundfos publishes a 4000 rpm build that lifts the same hydraulics further up the flow and head range — CRE 3-2 moves from 15.5 GPM at 48 ft to 17.6 GPM at 62 ft.
On-Board Control Panel
Setpoint, operating mode and the running state are set and read at the motor itself through the control panel and function module, so a small system needs no external controller at all.
Soft Starting, Every Start
Ramping up under drive control instead of slamming across the line takes the mechanical shock off the coupling and the water-hammer shock off the pipework, which is what usually breaks fittings on a hard-started booster.
Two Connection Styles
Oval and NPT female rated PN 16, or ANSI 250 lb flanged rated PN 25. The connection changes the maximum operating pressure, so it is a specification decision rather than a plumbing preference, and each is a separate listing here.
Cartridge Seal
HQQE throughout this range: silicon carbide faces with EPDM rubber, in a cartridge that comes out as one piece. Nothing to set by hand on reassembly, which is where seal changes usually go wrong.
Drinking Water Approvals
The CR platform carries drinking-water approvals for potable service. Confirm the exact approval list for your part number against the current Grundfos literature before specifying on a potable system.
CRE Against The Rest Of The CR Family
Same hydraulic platform, four different answers. The figures below come from our own product data for each range, not from memory.
| CR | CRE | CRIE | CRNE | |
|---|---|---|---|---|
| Speed control | Fixed speed | Integrated MLE drive | Integrated MLE drive | Integrated MLE drive |
| Wetted materials | Cast iron head and base, AISI 304 internals | Cast iron head and base, AISI 304 internals | All AISI 304 | All AISI 316 |
| Rated speeds | 3600 rpm | 3600 and 4000 rpm | 3600 and 4000 rpm | 3600 and 4000 rpm |
| Holds a setpoint alone | No — needs a drive and controller | Yes, with sensor | Yes, with sensor | Yes, with sensor |
| Best for | Steady duty where flow does not vary | Swinging demand on ordinary water | Swinging demand, no iron pick-up | Swinging demand, chlorides present |
Where CR still wins. On a duty that genuinely runs flat out at one point — a transfer pump that is either on or off — a fixed-speed CR costs less to buy, has fewer electronics to fail and gives up nothing, because there is no varying demand for a drive to track. The CRE earns its premium where the flow actually moves. And where the liquid attacks 304, no amount of speed control helps: that is a CRNE question, not a CRE one.
Documentation & Parts
Published Grundfos literature for the range, linked on every product page in this collection.
CRE, CRIE, CRNE, SPKE, MTRE, MTHE, CME Installation and Operating Instructions
MGE / MLE Motor Data Sheet
Data Booklet & Submittals
The full CRE 60 Hz data booklet, dimensional drawings and a factory submittal package are available on request — email sales@watermainsupply.com with the part number.
Seal Kits & Wear Parts
Cartridge seal kits, gasket kits and chamber stacks identified from the pump nameplate. Genuine Grundfos parts only — a pattern seal in a cartridge pump is a false economy.
Grundfos publishes CR-family curves as graphics rather than tabulated points, so the duty points on this page are the nominal figures from the technical data. For the curve itself, ask and we will send the manufacturer curve for your part number.
Why Source Grundfos CRE from Watermain Supply
We Size On The Boost
Send the inlet pressure, the target pressure, the elevation and the peak flow. We size on what the pump has to add, which is the number that decides the model — not the pressure you want at the tap.
Sensor Or No Sensor, Decided Properly
The two are not interchangeable and the wrong one arrives unable to do the job. Tell us how the system is controlled and we will pick the right part number and the right sensor span.
The Right US Build
60 Hz hydraulics, NEMA mounting and the voltage and phase your service actually has. Voltage is fixed per part number on an MLE motor, so getting it right at the order is the only chance to get it right.
Engineering-Led Selection
We work from the published Grundfos curve and the limits table, and we will tell you when the setpoint you want sits above what the pump or the connection can hold.
Multi-Brand Perspective
If CRE is not the right fit, we will say so and quote the one that is — including a fixed-speed CR where the demand does not vary, and including pumps from other manufacturers.
Everything On One Order
Pump, sensor version, documentation and the aftermarket parts list, quoted together from Houston so the job is not held up waiting on a second purchase order.
Frequently Asked Questions
The questions that come up most often on the phone about CRE selection.
What does the E in CRE actually add?
An MLE motor with the variable-speed drive built into it, and the control to use it. A CR is a fixed-speed pump: it runs at one speed and produces whatever pressure that speed gives at the flow being drawn. A CRE varies its own speed to hold a pressure you set. That removes the throttling valve, the separate drive panel and the wiring between them, because the drive is on the motor.
What is the difference between the 3600 rpm and 4000 rpm listings?
Rated speed, and therefore the duty point. An MLE motor is not limited to the 3600 rpm a two-pole induction motor turns on 60 Hz, so Grundfos publishes a second set of part numbers rated at 4000 rpm. The same CRE 3-2 gives 15.5 GPM at 48 ft at 3600 rpm and 17.6 GPM at 62 ft at 4000 rpm. They are different part numbers with different published curves, which is why they are separate listings rather than an option on one.
What does with sensor and without sensor mean?
Whether the pressure sensor and its cable ship with the pump. A with-sensor part number arrives ready to hold a pressure setpoint out of the box. A without-sensor part number is the same pump and the same drive, intended for a system that already has a transmitter, a building management system or an external controller feeding it a signal. Check which one your control scheme needs before ordering; the part numbers are not interchangeable.
Can I set any pressure within the sensor range?
Only up to what the pump can actually produce, and only up to what the body is rated for. The sensor span is the range the controller can be told to hold, not a pressure the pump can reach. A CRE 3-2 carries a 0-145 psi sensor but adds about 34 psi at shut-off, so the pump is the limit there. At the other end some CRE 10 spans reach 580 psi against a body rated 232 or 362 psi, so the body rating is the limit. The binding number is whichever is lower.
Do the oval and ANSI versions have the same pressure rating?
No. The oval and NPT female version is rated PN 16 and 232 psi maximum operating pressure. The ANSI 250 lb flanged version is rated PN 25, and 362 psi on most models. On the shorter CRE 10 stacks the ANSI version is 232 psi, so check the model, not just the connection style. Each listing states the rating for the connection it sells.
Is the pump curve the pressure I get at the tap?
No, and this is the most common misreading of a curve. A pump curve plots what the pump adds to the pressure already at its inlet. On a city main with 45 psi standing, a pump that adds 60 psi gives about 105 psi at the outlet, not 60. On a tank fed by gravity the inlet contributes almost nothing and the curve is close to what you get. Size on the boost required, not on the pressure wanted.
Will a bigger CRE give me more pressure at the fixture?
It gives more flow at the same pressure, which is usually what the problem actually is. If several outlets running together drop the pressure, the system is short of flow, and a larger frame at the same head fixes it. If one outlet alone is weak, more pressure is what is missing, and a taller stack in the same frame is the answer. Stepping up a frame to cure a pressure complaint is the usual mis-buy.
What voltages are available?
200-240 V single phase, 200-240 V three phase and 440-480 V three phase, fixed per part number. An MLE motor has no terminal-board changeover the way a fixed-speed CR motor does, so single-phase and three-phase units are not interchangeable and voltage cannot be reconfigured in the field. Confirm the supply before ordering.
What seals and materials do these use?
All of the part numbers in this range use the HQQE cartridge seal, with silicon carbide faces and EPDM rubber. Materials follow the CR family: CRE has a cast iron head and base with AISI 304 internals. Where you need all-304 or all-316 in the liquid path, the equivalents are CRIE and CRNE, which share the same MLE motor and control.
What documentation ships with these?
The installation and operating instructions covering CRE, CRIE, CRNE, SPKE, MTRE, MTHE and CME, and the MGE and MLE motor data sheet, are both linked on every product page. The full CRE 60 Hz data booklet, dimensional drawings and a factory submittal are available on request with the part number.
Ready to Size Your CRE?
Send us the peak flow, the inlet pressure you can count on, the target pressure, the elevation and the available voltage. We will respond with a sized selection, the matching part number, the sensor span and lead time.
Technical data on this page is taken from Grundfos U.S. 60 Hz product literature and is subject to change by the manufacturer. Confirm against the current installation manual and pump curve before specifying.
Grundfos, CR, CRI, CRN, CRT, CRE, CRIE, CRNE and MLE are trademarks of Grundfos Holding A/S, used here for product identification only.
Watermain Supply is a DBA of E4 Industrial LLC, an independent industrial supplier based in Houston, Texas.
Grundfos, CR, CRI, CRN, CRT, CRE, CRIE, CRNE and MLE are trademarks of Grundfos Holding A/S, used here for product identification only.
Watermain Supply is a DBA of E4 Industrial LLC, an independent industrial supplier based in Houston, Texas.
- Choosing a selection results in a full page refresh.