Product Lines by Job

Three lines carry most data center projects: a packaged system for the plant room, a split-coupled pump for the big loops, and a booster for domestic and make-up water. Every other line in the collection is grouped below by the job it does.

DELTA HCU

Packaged HVAC pumping system

182-1,660GPM rated flow

2 or 3NBSE pumps, 1 standby

CU 352BACnet standard

175 PSIliquid to 212°F

Two or three NBSE split-coupled pumps with MLE motors, stainless steel manifolds, suction diffusers, check valves and the CU 352 controller on one base, tested at the factory. One suction, one discharge and one power connection on site.

• 22 pre-engineered builds, 460-480V 3Ph
• ANSI Class 150 manifolds, 4 to 10 in
• cULus listed

Best forChilled and hot water distribution in modular or offsite-built plant rooms

View DELTA HCU

NBSE

Split-coupled end suction, variable speed

2,491 GPMmax flow, full speed

296 ftmax head

3-30 HPIE5 MLE motor

PEI 0.39-0.50DOE rating

The NBS hydraulics with the drive built into the motor. The split coupling lets the seal be changed without moving the motor, and the motor needs no separate VFD panel.

• 201 builds in 21 pump sizes
• 200-240V or 440-480V 3Ph
• Fixed-speed NBS to 200 HP and 4,596 GPM

Best forVariable-flow chilled water and condenser water loops

View NBSE

Hydro MPC-E

Variable speed booster system

59-143 PSImax boost (CRE)

633 GPMmax flow (CRE)

2-3 pumps3-10 HP each

232 PSImax working pressure

Duplex and triplex CRE or CME pumps, each with its own built-in drive, run by the CU 352 multipump controller. Dry-running protection is fitted.

• 30 CRE builds and 10 compact CME builds
• 208-230V or 460-480V 3Ph
• 2-1/2 in NPT to 6 in ANSI manifolds

Best forDomestic water, cooling tower make-up and water treatment feed

View Hydro MPC-E

Chilled water, condenser water and hot water circulation

TPE3 Inline

1/3-3 HP, to 343 GPM, built-in sensorVariable speed

TPE3 D Twin-Head

Duty-standby in one housing, to 525 GPMVariable speed

TP Inline

Cast iron or bronze, 1/3-3 HP, to 300 GPMFixed speed

VLS

3-75 HP, to 2,632 GPM, no inertia baseSplit-coupled

NBS 1750 / 3500 RPM

1-200 HP, to 4,596 GPM or 448 ftSplit-coupled

NB and NBE

Close-coupled, 3-30 HPFixed or variable

NK and NKE

Long-coupled, 3-200 HPFixed or variable

CRE-DP

Factory-mounted DP sensor, 1-20 HPVariable speed

Expansion, buffer and glycol make-up

GCBT Buffer Tank

120-1,040 gal, 3-10 in flangedChiller loop volume

GNTA Expansion

Closed heating and cooling loopsFixed diaphragm

GFXA and GFXA-HP

Booster tanks to 250 PSIReplaceable bladder

GTXA Thermal

Potable hot water expansion150 PSI

GGMP Glycol Make-Up

6-100 gal tank, simplex or duplexAutomatic fill

Grundfos Against Other Brands We Supply

The closest equivalents on our site, compared on the figures each listing publishes. Pick the one that fits the duty, not the logo.

Triplex booster systems for domestic and make-up water

Verdict: Hydro MPC-E covers the widest spread of mid-size duties, with a drive on every pump, the CU 352 controller and a 232 PSI working pressure. DAB Esybox Max wins on warranty (24 months), self-priming pumps and a compact 49 in wide footprint for loads under about 230 GPM. Franklin VR SpecPAK wins outright above 633 GPM and up to 250 PSI. DuraMAC IQ1000 offers single-phase builds that Hydro MPC-E CRE does not.

Close-coupled end suction pumps

Verdict: for a variable-flow HVAC loop, NBE saves the separate drive and its wiring, and its DOE PEI rating is published on the listing. Franklin AG and D series win where the duty is fixed speed and needs more horsepower in a close-coupled pump (AG to 75 HP), or where NPT connections suit the job.

Sizing and Best Practices

Two calculations decide most selections in this collection: the flow a cooling load needs, and the pressure a booster must add.

Hydronic flow from load. For water, GPM = BTU/h ÷ (500 × ΔT), where ΔT is the supply-to-return temperature difference in °F and 500 comes from 8.33 lb/gal × 60 min/h. A ton of cooling is 12,000 BTU/h. Glycol mixtures carry less heat per gallon, so they need more flow for the same load: use the factor for your mixture.

Booster pressure. Required boost = target pressure at the highest fixture + 0.433 PSI per ft of elevation + friction − minimum inlet pressure.

Before you order: confirm the liquid (water or the glycol percentage), the minimum suction pressure, the supply voltage and phase, and whether the loop runs constant or variable flow. Chiller makers state a minimum loop volume, usually in gallons per ton; when the piping holds less, a GCBT buffer tank makes up the difference.

Tanks, Sensors and Controls

The equipment that keeps a loop at pressure, at volume and under control.

DPI and Temperature Sensors

Differential pressure 0-0.6 to 0-10 bar; 4-20 mA temperature kits and wells

GCBT Buffer Tanks

ASME, 125 PSI, 120 to 1,040 gallons

GFXA-HP Tanks

200 or 250 PSI for high-pressure booster systems

GGMP Glycol Make-Up

Automatic fill to 70 PSIG, simplex to duplex with alternator

Genuine Grundfos parts and accessories, matched to the pump or system part number on request.