A pneumatic pump is a positive displacement pump that uses compressed air as its power source to transport fluids. Because it runs on compressed air rather than electricity, it is inherently safe in explosion-hazardous and wet environments. In the chemical, food, pharmaceutical, offshore and automotive industries, the pneumatic pump is the standard choice for fluid transfer. Laco supplies and rents ARO pneumatic pumps by Ingersoll-Rand.
The most common type is the double diaphragm pump. Compressed air enters through an air valve and alternately pushes two flexible membranes connected by a central shaft. As one membrane expels fluid, the other creates a vacuum that draws new fluid in. The cycle repeats continuously as long as compressed air is supplied. The air and fluid are completely separated. ARO’s patented motor design prevents the pump from freezing or blocking.
Continuous process pumps for light to medium viscosity fluids. ATEX certified, no pressure relief valve needed. Capacity: 1 to 1,040 litres per minute.
For all viscosities including very thick fluids. Available as two-ball, four-ball and chop-check variants. Extremely accurate for precision dosing.
| Feature | ARO diaphragm pump | ARO piston pump |
| Capacity | 1 to 1,040 litres per minute | Depends on pump size |
| Viscosity | Light to medium | All viscosities incl. thick |
| Typical fluids | Water, chemicals, ink, food, pharma | Lubricants, mastic, adhesives, pastes |
| ATEX certified | Yes, most models | Yes, most models |
| Freezing or blocking | Impossible (ARO patent) | Impossible (ARO patent) |
| Dosing accuracy | Less suitable | Excellent |
| Pressure relief valve | Not needed | Not needed |
Explosion safe: runs on compressed air, no sparks, suitable for ATEX zones per directive 2014/34/EU. Low maintenance: simple design with few moving parts. Wide fluid compatibility: water, chemicals, oils, food, pharmaceuticals, acids and solvents. Portable: works anywhere with a compressed air supply.
Chemical industry: transfer of acids, solvents and chemicals. ATEX certification essential. Food and beverage: pumping sauces, flavourings and oils. Pharmaceutical: precision dosing. Offshore and oil and gas: fluid transfer on explosion-hazardous platforms. Automotive: lubricants and cleaning agents.
Laco has been an official ARO distributor as part of Ingersoll-Rand since 1978. We supply and rent the complete ARO range from Zaandam and Rotterdam.
Continuous process pumps for light to medium viscosity fluids. ATEX certified, no pressure relief valve needed. Capacity: 1 to 1,040 litres per minute.
For all viscosities including very thick fluids. Available as two-ball, four-ball and chop-check variants. Extremely accurate for precision dosing.
A diaphragm pump handles light to medium viscosity fluids including corrosive chemicals. A piston pump handles all viscosities including thick fluids. Piston pumps are more accurate for dosing.
Most ARO diaphragm pumps comply with the ATEX Directive 2014/34/EU. Always verify the specific ATEX category against your site zone classification.
Most ARO pumps operate at an inlet air pressure of 2 to 8 bar. The ratio between inlet pressure and fluid outlet pressure depends on the pump model.
Yes. Laco rents ARO pneumatic pumps for short and long-term projects from Zaandam and Rotterdam.
