
ARO Pumps
Cost-effective solutions
ARO Pumps provide efficient and cost-effective solutions for transferring liquids from one storage location to another by utilizing a resource that most industrial operations already have installed as a basic component – compressed air.

Atex Diaphragm pumps
Maximum flow rate: 40.1 l/min. Maximum pressure: 6.9 bar. Available in ground acetal.
- Newly developed EXP air motor with exceptionally low energy consumption.
- Newly developed diaphragms with long lifespan.
- Never hangs in any end position due to unbalanced air exchange valve.
- Bolted pump to prevent leakage.
- ATEX approved.
Data | 1/4″ | 3/8″ | 1/2″ | 1 1/2″ |
Flow rate | 17,4 l/min | 40,1 l/min | 54,5 l/min | 465 l/min. |
Discharge pressure | 6,9 bar | 6,9 bar | 6,9 bar | 8,3 bar |

Electropolished diaphragm pumps
Max flow rate: 465 l/min. Maximum air pressure: 8.3 bar. Available in stainless steel.
- Newly developed EXP air motor with exceptionally low energy consumption.
- Newly developed diaphragms with long lifespan.
- Never hangs in any end position due to unbalanced air exchange valve.
- Freeze-free operation using Quick Dump technology.
- Bolted pump to prevent leakage.
- ATEX approved.
Data | 1/2″ | 1″ | 1 1/2″ | 2″ | 3″ |
Flow rate | 17,4 l/min | 40,1 l/min | 54,5 l/min | 465 l/min. | 465 l/min. |
Discharge pressure | 6,9 bar | 6,9 bar | 6,9 bar | 8,3 bar | 8,3 bar |

EXP metal diaphragm pumps
Max flow rate: 197 l/min. Maximum pressure: 8.3 bar. Available in aluminum, acid-resistant stainless steel, cast iron, and Hastelloy.
- Newly developed EXP air motor with exceptionally low energy consumption.
- Newly developed diaphragms with long lifespan.
- Never hangs in any end position due to unbalanced air exchange valve.
- Freeze-free operation using Quick Dump technology.
- Bolted pump to prevent leakage.
- ATEX approved.
Data | 1/2″ | 3/4″ | 1″ | 1 1/2″ | 2″ | 3″ |
Flow rate | 17,4 l/min | 40,1 l/min | 54,5 l/min | 465 l/min. | 465 l/min | 465 l/min |
Discharge pressure | 6,9 bar | 6,9 bar | 6,9 bar | 8,3 bar | 8,3 bar | 8,3 bar |

High-pressure diaphragm pumps
Max flow rate: 238 l/min. Maximum air pressure: 6.9 bar. Maximum liquid pressure: 13.8 bar. Available in stainless steel.
- Newly developed EXP air motor with exceptionally low energy consumption.
- Newly developed diaphragms with long lifespan.
- Never hangs in any end position due to unbalanced air exchange valve.
- Freeze-free operation using Quick Dump technology.
- Bolted pump to prevent leakage
- ATEX approved.
Data | 1″ (3:1) | 1 1/2″ (2:1) | 2″ (2:1) | 3″ (2:1) |
Flow rate | 17,4 l/min | 40,1 l/min | 54,5 l/min | 465 l/min. |
Discharge pressure | 6,9 bar | 6,9 bar | 6,9 bar | 8,3 bar |

Plastic diaphragm pumps
Max flow rate: 465 l/min. Maximum pressure: 8.3 bar. Available in polypropylene, PVDF, and ground acetal
- Newly developed EXP air motor with exceptionally low energy consumption.
- Newly developed diaphragms with long lifespan.
- Never hangs in any end position due to unbalanced air exchange valve.
- Bolted pump to prevent leakage.
- ATEX approved. (Acetal)
Data | 1/4″ | 1/2″ | 3/8″ | 1″ | 1 1/2″ | 2″ | 3″ |
Flow rate | 17,4 l/min | 40,1 l/min | 54,5 l/min | 465 l/min. | 465 l/min. | 465 l/min. | 465 l/min. |
Discharge pressure | 6,9 bar | 6,9 bar | 6,9 bar | 8,3 bar | 8,3 bar | 8,3 bar | 8,3 bar |

Pro metal diaphragm pumps
Max flow rate: 340 l/min. Maximum pressure: 8.3 bar. Available in aluminum, acid-resistant stainless steel, and cast iron.
- Never hangs in any end position due to unbalanced air exchange valve.
- Bolted pump to prevent leakage.
- ATEX approved.
Data | 1/2″ | 1″ | 1 1/2″ | 2″ | 3″ |
Flow rate | 17,4 l/min | 40,1 l/min | 54,5 l/min | 465 l/min. | 465 l/min |
Discharge pressure | 6,9 bar | 6,9 bar | 6,9 bar | 8,3 bar | 8,3 bar |

Pro plast diaphragm pumps
Max flow rate: 378 l/min. Maximum pressure: 8.3 bar. Available in polypropylene and PVDF.
- Never hangs in any end position due to unbalanced air exchange valve.
- Bolted pump to prevent leakage.
Data | 1/2″ | 1″ | 1 1/2″ | 2″ |
Flow rate | 17,4 l/min | 40,1 l/min | 54,5 l/min | 465 l/min. |
Discharge pressure | 6,9 bar | 6,9 bar | 6,9 bar | 8,3 bar |

Flap diaphragm pump 2”
Max flow rate: 651 l/min. Maximum air pressure: 8.3 bar. Max particle size: 50 mm diameter. Available in acid-resistant stainless steel and aluminum.
- Newly developed EXP air motor with exceptionally low energy consumption.
- Newly developed diaphragms with long lifespan.
- Never hangs in any end position due to unbalanced air exchange valve.
- Freeze-free operation using Quick Dump technology.
- Bolted pump to prevent leakage.
- ATEX approved.