Cooling Circuit Pumps (Process & HVAC Loops)
Keep process and HVAC cooling loops stable at part‑load with quiet, efficient pumps—and protect equipment with the right chemistry handling. We package inline ECM and end‑suction centrifugal for chilled water/glycol, multistage where head is high, and mag‑drive sealless for corrosive coolants. Brands: Grundfos, Griswold, Goulds, Finish Thompson, Iwaki, plus chemical feed and make‑up from LMI, Walchem, Neptune, Emec, J.L. Wingert and Flux.
Best‑Fit Pumps for Cooling Circuits
| Loop / Duty | Best Pump Type | Recommended Brands | Why It’s Best |
|---|---|---|---|
| Chilled water / glycol distribution | Inline ECM or end‑suction with VFD | Grundfos (MAGNA/TPE, end‑suction), Griswold | High efficiency and turndown, quiet operation, easy BMS control |
| High head recirculation (HX blocks, long runs) | Vertical multistage inline | Grundfos (CR/TPE) | Compact footprint; steep curve for stable control at higher ΔP |
| Corrosive or solvent‑based coolants | Mag‑drive sealless centrifugal (PP/PVDF/ETFE) | Finish Thompson DB/UC, Iwaki MX/MD | Leak‑free operation; excellent chemical compatibility; low maintenance |
| Side‑stream filtration circuits | End‑suction or mag‑drive centrifugal | Grundfos / Griswold, Finish Thompson / Iwaki | Steady non‑pulsing flow through filters & media beds |
| Corrosion/scale inhibitor dosing | Digital diaphragm metering | LMI PD/TD, Walchem EWN, Neptune 500/600, Emec, Grundfos DDA/DMX | Precise ppm control; PVDF/PTFE wet ends; pulse/4–20 mA control |
| Glycol make‑up / auto top‑off | Glycol feed & make‑up package | J.L. Wingert | Maintains static fill pressure; low‑level alarms; protects pumps from air |
| Drum/IBC chemical transfer | Drum/IBC pump | Flux F‑Series | Ergonomic unloading; quick tube changes; XP motor options |
Recommended Pumps & Systems (Placeholders)
Tip Send design GPM, required head (ΔP), fluid (water/glycol % or coolant), temperature range, and control strategy (ΔP/ΔT or BMS). We’ll return curves, wiring options, and a complete BOM.
How We Engineer Cooling Circuits
- Hydraulics—size to distribution ΔP at design GPM; apply VFD/ECM turndown for part‑load.
- Glycol corrections—we correct curves for viscosity & SG; select compatible elastomers.
- Materials—PP/PVDF/ETFE for aggressive coolants; bronze/SS fitted for water service.
- Controls—ΔP/ΔT logic, 4–20 mA/BMS, soft‑start, alarms and duty/standby sequences.
- Reliability—cartridge seals or sealless where leaks are unacceptable; easy service designs.
Common Cooling Circuit Uses
- Process cooling & thermal control
- Chilled water/glycol distribution
- Plate & frame HX loops
- Tooling/mold cooling
- Electronics & plating baths
- Side‑stream filtration loops
- Chemical inhibitor dosing
- Corrosive coolant recirculation
- Glycol make‑up & auto top‑off
- Drum/IBC chemical handling
Stable Temps, Lower kWh
Send design GPM, required head, fluid, temperature range and control strategy. We’ll quote a quiet, efficient cooling circuit package that installs fast and lasts.
Cooling Circuit FAQs
Inline ECM vs. end‑suction with VFD—what’s better?
Inline ECM saves space and simplifies balancing with onboard controls. End‑suction + VFD offers broad coverage and back‑pull‑out serviceability. We match to your flow/head and footprint.
How do glycol mixes affect pump sizing?
Glycol increases viscosity and specific gravity, which raises brake HP and shifts the curve. We correct the selection and confirm motor sizing and elastomer compatibility.
When do I need mag‑drive in a cooling loop?
Use mag‑drive for corrosive or solvent‑based coolants, or where emissions/leaks are unacceptable. For clean water/glycol, sealed centrifugals are typically more economical.