Small Diaphragm Pump Solutions For Compact Systems

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A small diaphragm pump moves liquids with compressed air. It uses flexible diaphragms to push fluids safely. It works well in tight spaces and handles many materials. It helps teams transfer chemicals, water, inks, or coatings with confidence.

ARO small diaphragm pump models deliver flow up to 125 l/min (33 GPM). These pumps fit small spaces and support many material options. Each pump uses a strong pneumatic motor for smooth, stall free work. Long life PTFE diaphragms provide twice the service life of standard PTFE.

Below are the compact small diaphragm pump models in the ARO portfolio.

1/4'' Non-Metallic Diaphragm Pump

Part of our Compact Series of pumps, our 1/4” pneumatic diaphragm pumps feature big performance in a compact package. Up to 5.3 GPM (20 l/min)

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3/8'' Non-Metallic Diaphragm Pump

Part of the ARO Compact Series diaphragm pump range, the 3/8” plastic pumps feature big performance in a small package. Up to 10.6 GPM (40.1 l/min).

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1/2'' Non-Metallic Diaphragm Pump

The 1/2'' non-metallic pneumatic diaphragm pumps of ARO are manufactured for complete corrosion resistance - constructed with polypropylene center body.

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3/4'' Aluminum Diaphragm Pump

The 3/4” aluminum metallic diaphragm pump feature big performance in a small package. It can achieve flow rates up to 33 GPM (125 l/min).

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3/4'' Metallic Diaphragm Pump

The ARO 3/4'' metallic air operated diaphragm pump is designed to achieve flow rates up to 13,6 GPM (51,5 l/min) and offer a wide range of material and ports.

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Why Choose An ARO Small Diaphragm Pump?

ARO pumps help reduce risk and downtime. They offer long service life, stable flow, and strong compatibility.

Key advantages:

Long‑life PTFE diaphragms last twice as long as standard PTFE.
Strong chemical resistance across all material choices.
Pneumatic motor design runs smoothly without stalling nor freezing.
Compact design fits in tight installations.
Optional electronic interface for precise cycle control.
Wide porting options support many applications

Typical Applications For Small Diaphragm Pumps

Chemical Dosing and Small Batch Transfer

When your process requires the use of acids, caustics, solvents and other hazardous chemicals, we know that safety comes first.

Built For Maintenance And Process Teams

A small diaphragm pump from ARO helps reduce downtime and service costs. It is simple to install and easy to maintain, to obtain better Total Cost of Ownership (TCO). The pump works safely with many fluids. Maintenance teams trust ARO for long life. Process engineers choose ARO for stable flow and chemical compatibility.

Extra Buyer Confidence For Your Small Diaphragm Pump Choice

Choosing a small diaphragm pump feels easier when key risks are removed. ARO designs every pump to solve space, chemical, and reliability concerns. Strong materials support harsh fluids without damage. Compact bodies fit tight areas and reduce installation time. The pneumatic motor prevents stalls, freezing, and it keeps systems running. Long‑life PTFE diaphragms lower maintenance needs. These features help maintenance and process teams trust the pump before installation.

Frequently Asked Questions

A small diaphragm pump is a compact air‑powered pump that moves liquids with flexible diaphragms. It offers strong flow in tight areas and provides safe performance with many fluids.