Air-operated double diaphragm pump range expanded

19 Aug 2022

The extensive range of Finish Thompson FTI Air-Operated Double Diaphragm pumps (AODD) has recently been expanded with the addition of a new ¼” non-metallic model, available in polypropylene, PVDF and also conductive polypropylene for use in ATEX areas.

Available in the UK from pump specialist Michael Smith Engineers the FT025 model delivers a maximum flow rate of 22 lit/min (5.8 gpm) at a maximum air supply pressure of 120 psi (8.3 bar). The FT025 extends the minimum flow capabilities of these rugged and reliable pumps and bring the important benefits of using AODD pumps to a wider range of pumping applications.

For example, as with all FTI AODD pumps, they are simple to install, easy to operate, require less maintenance resulting in lower running costs and are self-priming so can be dry-run. Furthermore, they are suited to handling abrasive, viscous and shear-sensitive liquids and even ‘dirty’ liquids with particles up to 1.8 mm (0.06”) for the FT025 model.

Typical applications will include handling acids, bases, plating solutions, wastewater, paints, inks, solvents, ceramic slip and glaze, lubricants and oils. This would embrace industries such as mining, painting, finishing, ceramics, electroplating and anodising, pulp and paper, wastewater and marine, chemical manufacturing and distribution.

In common with the other FTI Air models, the FT025 includes a unique lube-free air valve design which contributes towards the philosophy of a simple, rugged and reliable design. This means significantly fewer components compared to other air valves, resulting in reduced servicing time and the associated maintenance costs and downtime. The air valve components include a low friction slide valve on a ceramic plate to allow for long-life and superior sealing, and a moulded Buna gasket which ensures total sealing and eliminates flat gasket tearing.

FTI Air’s modular construction results in simplified maintenance with individually replaceable, lower cost wearing parts which do not require special tools for fitting. Single piece flow assembly procedures means that every pump is built to high quality specification and subjected to a three point test for vacuum, leakage and run ability.  

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