Best Yamada pumps for epoxy & resin dispensing systems
For most industrial epoxy/resin dispensing and transfer duties, the best-fit Yamada solution is typically an NDP Series air-operated double diaphragm (AODD) pump, selected and configured specifically for the resin chemistry, viscosity, and dispensing method.
https://www.yamadapump.com/ndp-series/
1) Bulk transfer / supply to a dispenser (day tank or feed system)
Recommended: Yamada NDP Series AODD pump (often 1/2″–2″ depending on required flow and viscosity)
Why it works well
- Handles high-viscosity fluids better than many pump types when run at appropriate speed
- Self-priming; can pull from drums/totes (within practical suction limits)
- Stall-resistant and simple control using air pressure
- Dry-run capable (helpful during drum changeovers—though avoid extended dry-running with very sticky materials)
Typical configuration notes
- Run the pump slow to reduce heat buildup and improve check-valve sealing with viscous product
- Consider larger port size than your line size if resin is very viscous (improves suction and reduces cycling rate)
- Use short, large-ID suction plumbing and minimize elbows
2) Direct “dispensing” at the gun/nozzle (controlled, repeatable delivery)
Recommended: NDP pump can be used as a transfer/supply pump, but most precision dispensing (shot size ratio control for 2K materials) is usually handled by the dedicated dispensing/metering equipment downstream.
Where the NDP pump fits
- Feeding a pressure pot, day tank, or metering skid
- Recirculation/conditioning loops (if your process allows)
Useful accessories
- Pulsation dampener (AD Series) to smooth flow and stabilize supply pressure:
https://www.yamadapump.com/accessories/pulsation-dampeners/ - Air filter/regulator for stable pump cycling and consistent supply
3) Choosing elastomers (“rubber”) for epoxy/resin service
This is often the make-or-break for reliability.
Common choices (must be verified with your exact resin + solvents)
- FKM: frequently a strong candidate for many resin/solvent environments and higher temperatures
- NBR: sometimes suitable for certain resin systems, but can swell depending on solvents/plasticizers
- PTFE diaphragms: used when chemical resistance is the priority, especially if aggressive solvents are present (ensure O-rings/backup elastomers are also compatible)
Key questions
- Is it 100% solids or solvent-cut resin?
- Any ketones, esters, aromatics, or other strong solvents in the resin/flush?
- What do you use for line flushing/cleaning?
4) Critical notes that affect pump selection
- 2-part (2K) epoxy/resin: Don’t mix A and B upstream of the pump unless your process is specifically designed for it—mixed material can cure inside the pump/lines.
- Abrasion/fillers: Filled resins (silica, alumina, glass, pigments) increase wear; slower cycling helps.
- Temperature control: Cold resin = much higher viscosity. Warming can help but changes compatibility and cycle loads.
- Check-valve performance: Very viscous/sticky materials often benefit from slower speed and proper suction conditions to keep checks sealing.
What I need to recommend the best specific Yamada NDP model
For each fluid (resin/epoxy component A and B if applicable), please share:
- Single-component or 2-part? (A/B)
- Viscosity (cP) and temperature at pumping
- Flow rate needed (continuous GPM) or “drum emptying time” target
- Discharge pressure (feeding a day tank? long hose? filter? meter?)
- Any solvents in the resin or used for flushing/cleanup
- Any fillers/abrasives and % solids
- Packaging: drum / tote / pail, and whether suction is flooded or lift
With those, I’ll narrow it to the best-fit NDP size and wetted materials (body + diaphragms/balls/O-rings) for an epoxy/resin dispensing supply system.