Blending & Ratio‑Mixing Pumps
Resin A/B, solvent cuts, lubricant packages, sauces and syrups—precise blends depend on pumps that keep flow steady while protecting product quality. We size progressive‑cavity metering systems, external gear pumps, mag‑drive sealless pumps, and sanitary lobe/peristaltic pumps from Graco, Neptune, Roper, Finish Thompson, Iwaki, Flux and Wilden—configured for accuracy, cleanliness, and uptime.
Which Pumps Nail Precision Blending?
| Requirement | Best Technology | Recommended Brands | Notes |
|---|---|---|---|
| High‑viscosity resins, mastics (5,000–100,000 cP) | Progressive‑cavity (metering duty) | Graco (metering/dispense), Flux (PC) | Low shear, linear flow vs. speed, excellent ratio control |
| Solvents / monomers (flammables) | Mag‑drive sealless centrifugal (ETFE/316SS) | Finish Thompson DB/UC, Iwaki MX | No mechanical seal; ideal for clean in‑line dilutions |
| Lubricant & additive packages | External gear | Roper A‑Series, Blackmer G‑Series | Pulse‑free, jacketed options for temperature control |
| Food & beverage syrups / sauces | Sanitary lobe or peristaltic | Graco SaniForce, Flux F‑Series | 3‑A options, CIP/SIP capable, gentle on particulates |
| Micro‑dosing catalysts / colorants | API‑675 diaphragm metering | Neptune 500/600, LMI PD | ±1% accuracy; stroke length & speed turn‑down |
| Abrasive pigment slurries | AODD (air‑operated diaphragm) | Wilden, Yamada | Run‑dry capable; handles solids without damage |
Recommended Pumps (Placeholders)
Tip Send viscosity at min/max temp, target ratio, total flow, and allowable shear—your quote will include curves, motor sizing, and any jackets/CIP hardware needed.
How We Engineer Pumps for Blending
- Ratio accuracy via PD pumps, VFD speed control, and optional mass‑flow feedback for closed‑loop blending.
- Shear & air control—slow RPM, flooded suction, degassing heads, and pulsation dampeners where required.
- Temperature management—jacketed gear pumps, heat tracing, and insulated lines for cold‑flow resins.
- Hygienic design—3‑A/EHEDG lobe or peristaltic with tri‑clamps, full CIP/SIP documentation.
- Area classification—Class I Div 1/2 motors, bonding/grounding for solvent blending rooms.
- Filtration & strainers sized to viscosity to protect meters and pump internals.
Common Blending Applications & Fluids
- Epoxy, polyurethane & acrylic systems
- Pigment & tint concentrates
- Lubricant & additive packages
- Adhesives & sealants
- Fragrances, flavors & syrups
- Solvent dilutions & monomer feeds
- Food sauces with particulates
- Colorant micro‑dosing
- Emulsions & dispersions
- Two‑component ratio mixing (A/B)
Lock In Your Blend—Get the Right Pump & Controls
Share your ratio, viscosity/temperature window, target flow and any hygienic or hazardous‑area requirements. We’ll spec a complete, code‑ready package.
Blending Pumping FAQs
How do I keep ratio accurate when viscosity changes?
Use positive‑displacement pumps with VFDs and add mass‑flow meters for closed‑loop control. We correct pump curves for temperature and apply speed limits to hold accuracy.
What’s best for shear‑sensitive or aeration‑prone blends?
Progressive‑cavity and lobe/peristaltic pumps run at low RPM, minimize shear, and reduce air entrainment—especially with flooded suction and short inlet lines.
Can mag‑drive pumps handle solvent blending?
Yes—ETFE‑lined or 316 SS mag‑drive sealless pumps remove seal failures and emissions. We pair them with Class I motors and proper bonding/grounding in solvent rooms.
Do I need jackets or heat tracing?
If cold‑start viscosity spikes, yes. Jacketed gear or PC pumps and heated lines keep suction losses low and horsepower reasonable.