Pump for 55 Gallon Spray Contact Pail

For emptying a 55-gallon spray contact pail (typically containing pesticides, herbicides, or other agrochemicals), you need a safe, chemical-resistant, and efficient pump that ensures complete evacuation while minimizing operator exposure. Here’s the best solution:

Recommended Pump: Air-Operated Double Diaphragm (AODD) Pump

Why?

• Chemical Resistance: Handles aggressive solvents, pesticides, and corrosive liquids.

• Sealless Design: No leaks (prevents operator exposure to hazardous fluids).

• Self-Priming & Dry-Run Safe: Works even if the pail is nearly empty.

• Portable & Easy to Clean: Ideal for switching between different chemicals.

Key Features to Look For:

1. Material Compatibility

• Pump Body: Polypropylene (PP), PVDF, or stainless steel (for harsh chems).

• Diaphragm: PTFE or Santoprene (resists pesticides/spray contact fluids).

• Ball/Valves: Viton, EPDM, or PTFE-coated.

2. Flow Rate & Pressure

• ~5-15 GPM (adjustable via air pressure) for efficient pail emptying.

3. Accessories

• Dipping Tube: Stainless steel or polypropylene, adjustable to reach the bottom.

• Drum Cover/Adapter: Seals the pail opening to prevent spills/vapors.

• Discharge Hose: Chemical-resistant (e.g., PTFE-lined) with spray gun/nozzle if needed.

Alternative: Electric Drum Pump (If AODD Not Available)

• Gear or Rotary Lobe Pump (for viscous formulations).

• Peristaltic Pump (if ultra-precise dosing is needed).

• Ensure explosion-proof motor if handling flammable chemicals.

Top Brand Recommendations

1. Wilden (AODD Pump) – Reliable for agrochemicals.

2. Yamada (AODD Pump) – Budget-friendly, chemical-resistant.

3. Graco (Drum Pump Kits) – Complete systems with hoses & nozzles.

4. Lutz (Electric Drum Pumps) – Good for moderate-viscosity sprays.