Double-diaphragm pumps operated by compressed air. Designed for viscous fluids prone to settling, with heavy-duty ball valves allowing the passage of solids up to 22.2 mm. Made of cast iron, aluminum, or stainless steel, with diaphragms and valves available in various elastomeric materials. Features the ESADS+ system, lubrication-free, enabling air valve access without dismantling the piping. Offers upper and lower connection options.