Ashton Pumps AA25 (1″) Metallic & Non-Metallic AOD

The all new AA25 (1″) air operated diaphragm offers the very latest in efficient air motors, saving up to 30% more air compared to many of our competitors and offers a stall-free low pulsation air valve which provides smooth and rapid changeover.







Not only does the air consumption saving (up to 30%) result in far reduced running costs, but also it offers 20% more flow than the older AT25, as well as giving the opportunity to change the stall free modular air valve, without the need to remove the pump from its installation.

Manufactured in either Polypropylene, conductive Polypropylene, PVDF, Aluminium, Stainless steel and Hastelloy with a full spectrum of ball and diaphragm materials to suit every application.  Our offering is further enhanced with the availability of our new PTFE overmolded diaphragm option, which has proven to offer up to 5 times longer diaphragm life.

Units are rated for max flowrate of 189 l/min at max pressure of 8.6 Bar


Key features:

One piece centre section:

Available in Polyproplyene for chemical compatibility or 316 Stainless Steel, all offering reduced air leakage.

External Pilots:

Provide ease of access and maintenance.

Wide range of material options:

Mechanically reinforced plastics including Polypropylene and PVDF, Metals including Aluminium, Stainless Steel and Hastelloy C™.

Modular Air valve:

Stall free operation provides smooth and rapid changeover along with ease of maintenance.

Increased flow & Efficiency:

Saves as much as 30% less air as well as providing up to 20% more flow against traditional designs.

New centre connection:

Option of end ported or centre ported connections for flexibility, both with reinforced moulding giving far superior nozzle loadings and mechanical stability.

Click here to download the engineering data sheet for the metallic pump

Click here to download the engineering data sheet for the non-metallic pump


Ashton Pumps Ltd