Diaphragm Pumps
Air-operated (pneumatic) and electric diaphragm pumps: aluminum, stainless steel, and plastic-bodied models for chemicals, paint, sludge, viscous, and food liquids.
Subcategories
Products (23)
- Huge Pump-Günalsan HP02 Air-Operated Diaphragm Pump, Polypropylene Body, 15 L/min, 7 Bar, 1/4", Santoprene/Steel Ball – $106.57
- Huge Pump-Günalsan HP02 Y Series Plastic Body Air-Operated Diaphragm Pump, 16 L/min, 1/4" – Request a quote
- Huge Pump-Günalsan HP05 Air-Operated Diaphragm Pump, Polypropylene Casing, 55 L/min, 7 Bar, 3/4" – $148.99
- Huge Pump-Günalsan HP05 ATEX Metal Body Air-Operated Diaphragm Pump, 55 L/min, 3/4" – Request a quote
- Huge Pump-Günalsan HP05 Hygienic Air-Operated Diaphragm Pump, 55 L/min, 3/4" – Request a quote
- Huge Pump-Günalsan HP05 PB Plastic Body Air-Operated Diaphragm Pump, 55 L/min, 3/4″ – Request a quote
- Huge Pump-Günalsan HP10 Air-Operated Diaphragm Pump, Polypropylene Body, 150 L/min, 7 Bar, 1 inch – $231.04
- Huge Pump-Günalsan HP10 Electric Diaphragm Pump, Plastic Body, 55 L/min, 2 Bar, 1", Santoprene, 380V – $1,683.55
- Huge Pump-Günalsan HP10 High-Pressure Air-Operated Diaphragm Pump, 75 L/min, 1" – Request a quote
- Huge Pump-Günalsan HP15 Air-Operated Diaphragm Pump, Polypropylene Body, 400 L/min, 7 Bar, 1½″, EPDM – $372.79
- Huge Pump-Günalsan HP16 Electric Diaphragm Pump with Flap Valves, 13.8 m³/h, 230 L/min – Request a quote
- Huge Pump-Günalsan HP16 Metal-Cased Air-Operated Diaphragm Pump with Flap Valves, 400 L/min, 1½" – Request a quote
- Huge Pump-Günalsan HP20 Plastic Polypropylene Body Air-Operated Diaphragm Pump, 560 L/min, 7 Bar, 2 inch, EPDM – $454.84
- Huge Pump-Günalsan HP30 Air-Operated Diaphragm Pump, Aluminium Body, 890 L/min, 7 Bar, 3 inch – $1,395.45
- Huge Pump HP02 ATEX Plastic Air-Operated Diaphragm Pump, 16 L/min, 1/4'' – Request a quote
- Huge Pump HP05 Air-Operated Diaphragm Pump, Dual Inlet/Outlet, Plastic Body, 55 L/min, 3/4" – Request a quote
- Huge Pump HP05 Electric Diaphragm Pump, Plastic Body, 20 L/min, 2 Bar, 3/4", Santopren, 380 V – $1,400.64
- Huge Pump HP05 PB-Body Electric Diaphragm Pump, 1.48 m³/h – Request a quote
- Huge Pump HP10 Hygienic Air-Operated Diaphragm Pump (New Series), 150 L/min, 1" – Request a quote
- Huge Pump HP10 Side-Entry Metal Body Air-Operated Diaphragm Pump, 150 L/min, 1" – Request a quote
- Sailflo DP-160M Diaphragm High-Pressure Water Pump / Booster Pump, 220 V, 11 Bar, 5.5 L/min – Request a quote (out of stock)
- Sailflo FL-32 Diaphragm Water Pump, Booster Pump, 220 V, 2.4 Bar, 12.5 L/min – Request a quote (out of stock)
- Sailflo HV-25M Diaphragm Water Pump, Booster Pump, 220 V, 4.1 Bar, 25 L/min – $183.60
Brands: Huge Pump-Günalsan · Sailflo
How does an air-operated diaphragm pump work?
In air-operated (pneumatic) double diaphragm pumps, compressed air alternately pushes two diaphragms connected by a shaft. While one diaphragm discharges liquid, the other draws it in; ball check valves ensure the flow moves in one direction only. There is no electric motor, so the risk of sparking is low, making these pumps a frequent choice in flammable environments. If the operating environment has ATEX requirements, product documentation must be checked separately.
Strengths of diaphragm pumps
- Self-priming: Can be dry-started and purges air from the suction line.
- Dry-run resistant: Not damaged by brief dry running.
- Challenging liquids: Can handle viscous, solid-particle, corrosive, and chemical liquids.
- Easy adjustment: Flow rate can be adjusted steplessly via air pressure and volume.
- Closed-valve tolerance: The pump stops when the discharge line is closed and restarts as air is supplied.
Material selection
The casing material is selected according to the fluid: aluminum and cast iron casings for oils, paints, and solvents; stainless steel casings for food, chemical, and hygienic applications; and plastic casings such as polypropylene for acids and bases. The diaphragm and ball material (such as PTFE, rubber, and thermoplastic elastomers) must also be compatible with the liquid. Models described as hygienic are designed for food and beverage production.
Installation and air preparation
Supplying the pump with clean, dry air significantly extends the life of the air valve. For this reason, fitting an air conditioner unit (filter and regulator) to the air line is recommended. A flexible connection can be used on the discharge line to reduce vibration. Where electrical operation is preferred, electric diaphragm pumps are an alternative.
Frequently asked questions
How much air does a diaphragm pump consume?
Consumption depends on the pump size, required flow rate, and pressure. Select the compressor based on the manufacturer's air consumption figures.
What does it mean if liquid is coming from the pump exhaust?
This usually indicates that one of the diaphragms has ruptured; stop the pump and replace the diaphragm.
Can sludge and paint be pumped?
Yes; solid-particle and viscous liquids are among the typical applications for these pumps.
Where can I find spare parts?
For diaphragm retainers, air valve repair kits, and gaskets, see the diaphragm pump spare parts category.
Why does the pump stop?
Contamination or icing in the air valve, insufficient air pressure, or a blocked line can cause the pump to stop.