Engineered for the Most Demanding Solids-Handling Applications
When your application involves large, abrasive, or fast-settling solids, you need a pump that won’t clog or wear out quickly. SANDPIPER’s Heavy Duty Flap Pumps, available in both metallic and non-metallic models, are built to move even the toughest fluids with confidence and control.
These air-operated double-diaphragm (AODD) pumps are designed with a full flow-through, bottom-discharge design and swing-style flap valves that pass solids up to 3" in diameter, keeping your system running by reducing clogs and protecting components.
Key Features:
Key Features:- Sizes: 1 - 4" sizes (25 - 102 mm)
- Flow: 70 - 310 gpm (265 - 1173 lpm)
- Solids Handling: 1 - 3” (25 - 76 mm)
- Construction: Aluminum, Cast Iron, Stainless Steel, Polypropylene
- Elastomers: (Diaphragms & Flaps) Nitrile, Neoprene, Hytrel®, Santoprene®, Fluorocarbon, EPDM, Urethane
- Bottom-discharge porting clears solids efficiently, preventing buildup and wear
- Dry prime suction lift up to 24 ft., 5% higher than typical ball valve pumps
- Quick access to serviceable components for faster maintenance and less downtime
- ESADS+Plus air distribution system allows easy in-line maintenance
What Makes Flap Pumps Different?
Unlike standard ball valve pumps, flap valves create a more direct path for challenging materials to flow. This makes Heavy Duty Flap Pumps especially effective when:
- Solids are too large for ball valves
- Material settles quickly or becomes compacted
- You need vertical lift or long suction lines
- You want fewer wear parts exposed to abrasive slurries
