Wilden invented the air-operated double diaphragm pump in 1955 and remains the benchmark against which all others are measured. Their Pro-Flo SHIFT air distribution system delivers best-in-class air efficiency, reducing compressed air consumption by up to 50% compared to conventional designs — a significant operational cost saving over the pump’s lifetime.

SandPIPER pumps, manufactured by Warren Rupp, are built for the harshest industrial conditions. Their particular strength is handling abrasive and viscous fluids — thick slurries, drilling mud, ceramic slips — that would quickly destroy a less robust pump. The Elima-Matic design eliminates the air valve entirely, reducing the most common failure point in conventional AODD pumps.

ARO (now part of Ingersoll Rand) is one of the most widely installed AODD pump brands in UK industry. Their EXP and PD series pumps offer a straightforward, proven design that is easy to maintain and simple to source parts for. ARO pumps are the choice of plant engineers who need reliable, no-nonsense performance across a wide range of general industrial applications.

Tapflo has built a strong reputation in the food and beverage and pharmaceutical sectors, where hygiene standards are paramount. Their pumps are designed with smooth internal surfaces and minimal dead zones to facilitate cleaning-in-place (CIP) and avoid fluid contamination. Tapflo’s polypropylene and PVDF-bodied pumps also offer excellent chemical resistance at competitive price points.

Yamada pumps are engineered to Japanese manufacturing tolerances and are particularly noted for longevity in high-cycle applications. Where other pumps may require diaphragm replacement every few months, a well-specified Yamada running the correct diaphragm material will often significantly outlast the competition. Their NDP series is a mature, well-proven platform with a comprehensive range of sizes from ¼” to 3″.

Graco is the dominant name in paint and coatings fluid handling. Their Husky series AODD pumps are purpose-designed for the transfer and circulation of paints, lacquers, adhesives, and similar viscous materials. Graco pumps are found on spray lines, paint kitchens, and coating operations throughout UK manufacturing. Where the application involves coatings, Graco is almost always the industry standard.

Blagdon is a British brand with a long heritage in the UK chemical processing industry. Their pumps are built to handle aggressive chemicals and solvents, with a particularly strong range of PVDF and polypropylene-bodied pumps suited to highly corrosive duties. As a UK-designed pump, Blagdon spare parts are well supported domestically and the brand has a loyal following among UK chemical plant engineers.

Versamatic offers solid AODD pump performance at a lower price point than the premium brands. For general industrial applications where the fluid is not aggressive and pump duty is moderate, Versamatic provides good value without compromising on reliability. Their parts are interchangeable with Wilden in some configurations, which can simplify parts stocking for sites running both brands.