Industry — Adhesives & Sealants
Rotary Gear Pumps for Adhesives & Sealants
Positive-displacement gear pumps for high-viscosity adhesive, glue, hot melt, and sealant transfer from drums, totes, and bulk tanks to the line.
A gear pump for adhesives moves thick glue, sealant, hot melt, and resin on plant transfer lines without stalling the way a centrifugal pump does. NAPCO ductile iron PA300C and PA200C are the usual adhesive plant picks: self-priming, bi-directional for drum and tote load-out, and rebuildable with a matching kit. Flow stays predictable as viscosity changes with temperature. Start with PA300C for high volume and PA200C for smaller lines. Stainless S models only when the fluid is corrosive.
Why rotary gear pumps for adhesive transfer
Adhesives and sealants present unique pumping challenges — high viscosity, temperature sensitivity, and the tendency to set up in equipment that sits idle. A gear pump for adhesives handles these conditions with a simple, robust construction that delivers consistent flow even with extremely thick materials.
The positive displacement design means flow rate stays predictable as viscosity changes with temperature — a critical requirement when pumping hot melt adhesives or temperature-cycled sealants. And bi-directional operation lets operators load and unload adhesive drums, totes, and tanks without re-plumbing.
High-Viscosity Capable
Positive displacement design handles thick adhesives, mastics, and sealants that would stall centrifugal pumps.
Self-Priming
Draws adhesive directly from drums, totes, and bulk tanks — no external priming or vacuum assist needed.
Bi-Directional
Forward and reverse flow from a single pump. Load, unload, and transfer without re-plumbing lines.
Consistent Metering
Predictable volume per revolution enables accurate batching and dispensing across production runs.
Adhesive, glue, sealant, and hot melt plant transfer
Plant adhesive work is drum, tote, tank, and load-out transfer of glue, sealant, hot melt, and resin. Operators need predictable flow as viscosity climbs, plus reverse flow to empty containers without re-plumbing.
This hub is the plant page for a gear pump for adhesives, an adhesive pump, a sealant pump, and a glue pump. Keep spoke depth on the high-viscosity adhesive pump guide and high-viscosity pump selection for adhesives.
Ductile iron for demanding adhesive duty
For most adhesive and sealant applications, NAPCO ductile iron pumps deliver the durability and cost-effectiveness that production environments demand. The ductile iron housing withstands the mechanical stresses of pumping thick, viscous materials day after day, and the ductile iron shaft provides excellent fatigue resistance under continuous loads.
Stainless S models only when the fluid is corrosive — solvent-heavy or chemically aggressive formulations. Both material options feature nitrile gears as standard (rated to 240°F), with Viton gears available for elevated hot melt temperature.
Recommended pumps for adhesive & sealant transfer
PA300C — 3″ Ductile Iron
Best for: high-volume adhesive / sealant / glue plant transfer, packaging, wood products.
| Max Flow | 158 GPM @ 280 RPM |
| Max Pressure | 100 PSI |
| Housing | Ductile Iron |
| Gears | Nitrile or Viton |
| Weight | 173 lbs |
PA200C — 2″ Ductile Iron
Best for: smaller adhesive lines, batch glue/sealant duty, tight floor space.
| Max Flow | 69 GPM @ 190 RPM |
| Max Pressure | 100 PSI |
| Housing | Ductile Iron |
| Gears | Nitrile or Viton |
| Weight | 114 lbs |
Nitrile gears are the default. Viton for elevated hot melt temperature. Match the rebuild kit on the gear pump service kit finder. Stainless S (PA300S, PA200S) only when the fluid is corrosive.
Adhesive & sealant applications
- —Wood products — Resin and adhesive transfer in plywood, OSB, engineered lumber, and laminated beam production.
- —Hot melt — Temperature-controlled transfer of thermoplastic adhesives for packaging, labeling, and assembly lines.
- —Construction sealants — Silicone, polyurethane, and acrylic sealants from bulk containers to dispensing equipment.
- —Epoxy and resin — Metering and transfer of two-part epoxy, polyester resin, and casting compounds.
- —Packaging adhesives — Case sealing, carton closing, and laminating adhesives on continuous-duty lines.
Related technical resources
High-Viscosity Adhesive Pump Guide
Pumping high-viscosity adhesives, sealants, and resins on plant transfer lines.
High-Viscosity Pump Selection for Adhesives
Pump selection for adhesives, sealants, and resin-based materials.
Rotary Gear Pump Working Principle
How a positive-displacement rotary gear pump moves viscous fluid.
How to Size a Rotary Gear Pump
Flow, viscosity, pressure, and material selection for plant transfer.
Nitrile vs. Viton Gears
When to choose nitrile vs. Viton based on temperature and compatibility.
Gear Pump Service Kit Finder
Match PK200C or PK300C to the adhesive-duty pump you already run.
Also: PA300C · PA200C · Request a quote.
A shorter plant-transfer note is also on adhesive pump.
FAQs
Why should I use a rotary gear pump for high-viscosity adhesives?
Rotary gear pumps use positive displacement design to maintain consistent flow with thick adhesives that would stall centrifugal pumps. The simple construction handles viscous materials reliably without complex alignment or periodic maintenance.
Can NAPCO pumps handle hot melt adhesives?
Yes. Standard nitrile gears are rated to 240°F and work well for most adhesive applications. For hot melt compounds or elevated-temperature sealants, Viton gears are available with extended temperature ratings.
What is the maximum flow rate for the PA300C pump used in adhesive transfer?
The PA300C delivers a maximum flow of 158 GPM at 280 RPM with 100 PSI maximum pressure. It is the workhorse for high-volume adhesive transfer in wood products and packaging manufacturing.
Are NAPCO adhesive pumps field-serviceable?
Yes. All NAPCO pumps include field-serviceable repair kits with drop-in components — gears, seals, and gaskets. No specialized tools or factory return required. Complete rebuilds can be done on-site in minimal time.
Can I use the same pump for loading and unloading adhesive drums?
Absolutely. The bi-directional operation of NAPCO pumps allows forward and reverse flow from a single unit. Load and unload without re-plumbing — just reverse the motor rotation.
What gear pump is best for adhesives?
PA300C for high-volume plant transfer; PA200C for smaller lines. Match kit to the pump.
Can a NAPCO pump handle glue and sealant as well as adhesive?
Yes. Same ductile iron rotary gear pumps transfer glue, sealant, hot melt, and resin when viscosity and temperature are in range.
Do I need stainless for adhesive transfer?
Usually no. Ductile iron C models cover most adhesive and sealant plants. Use stainless S when the fluid is corrosive.
Need a pump for adhesive or sealant transfer?
Tell us about your material — viscosity, temperature, flow requirements — and we’ll recommend the right NAPCO pump and gear combination.