ARO Diaphragm Pump – Compact EXP Series, 1/2″ AL/NBR | ATEX Rated

Lightweight, efficient and engineered to perform — the Compact EXP Series ARO diaphragm pump is your go-to solution for reliable low to mid-volume fluid handling. This 1/2″ metallic model combines aluminium construction with NBR (nitrile) diaphragms and balls, thereby offering excellent performance in a variety of oil and chemical transfer applications. Despite its compact design, this ARO diaphragm pump delivers flow rates of up to 50 LPM (14.4 GPM) and includes features typically reserved for larger pumps — making it a powerful addition to any setup requiring consistent, pulse-reduced flow in a smaller footprint.

Part No. ARO: 20013439
ARO PART code: PD05P-AAS-FGG
Part code Flux: FDM 12 AL/NN
Part No. Flux: 10-M1210200

Hardware: Stainless steel

Ex-classification: ATEX – Group II 2GD X

Material configuration: Aluminium body, manifolds and seats with nitrile (NBR) diaphragms and balls

Inlet/Outlet: 1/2″ BSP (Female)

Air inlet: 1/4″ BSP

Maximum flow: 50 LPM

Displacement per cycle: 0.039 gal (0.15 L)

Max operating pressure: 6.9 Bar

Max suspended solids: 2.4 mm

Dry suction lift: 4.5 m

Sound level: 75 dB(A) @ 70 PSI

Weight: 3.8 kg

Also includes: Integral muffler for quiet operation

ATEX-rated for use in potentially explosive environments

This ARO diaphragm pump offers exceptional fluid handling performance thanks to ARO’s precision-engineered internal valve system, consequently designed to deliver optimal efficiency and durability:

The unbalanced D-Valve design optimises airflow and eliminates diaphragm stalling, therefore ensuring smooth operation in heavy-duty, high-uptime applications. This mechanism prevents disruption of fluid flow, significantly improving reliability and reducing maintenance downtime.

SimulShift™ valve technology enhances start-up responsiveness and minimises pulsation, providing consistent flow characteristics and reducing wear on both the diaphragm and internal components, thereby extending operational life.

Aluminium and NBR (nitrile rubber) components are strategically selected for their superior resistance to diesel, mineral oils, water-based fluids and also light chemicals. NBR is a cost-effective alternative to more expensive elastomers, however it maintains integrity and performance in industrial and petrochemical applications.

And with ATEX-certification as standard, this diaphragm pump is ideal for Zoned area applications requiring liquid transfer, batching, or also circulation. The design is optimised for ease of serviceability, ensuring minimal downtime and low maintenance costs, while offering long-lasting durability even under demanding operating conditions.

This model is best suited for:

General manufacturing use

Oil, coolant and also water transfer

Ethanol and detergent dosing

Maintenance shops and plant utilities

Packaging and filling systems

Also, processes requiring an explosion-proof diaphragm pump in a compact format

This pump is the equivalent to the Flux FDM 12 AL/NN, therefore offering identical chemical compatibility and performance — backed by ARO’s trusted 5-year warranty and engineering pedigree.

Learn more about the ARO PRO Series

View our full ARO diaphragm pump range