These positive displacement pumps operate on compressed air and perform the suction-discharge cycle using a double diaphragm and a pneumatic distributor. Lacking an electric motor, they generate no sparks; the pumping flow rate and discharge pressure are easily controlled by adjusting the air pressure and flow rate. The Ruby design incorporates optimized air circuit management and a unique distributor geometry, which reduces pulsation and improves efficiency.

It is widely used for transferring, circulating, filling, and dosing viscous, particulate, abrasive, or solvent-based fluids. The body and parts in contact with the fluid are suitable for corrosive chemicals when made of PP or PVDF, and for solvents and food applications when made of aluminum or AISI 316 stainless steel. The conductive series is preferred for use in explosive atmospheres; hygiene requirements are met in the food industry thanks to the AISI 316 contact surfaces and appropriate elastomers.

The advanced composite PTFE diaphragm eliminates leakage risks by removing the central orifice and improves performance with a higher flow rate per revolution. The next-generation pneumatic valve offers an excellent pressure-to-flow ratio and reduced air consumption, even without oil. Optional frost barriers and anti-icing protection enhance reliability in cold weather. The sealed, compact design improves reliability in contaminated environments.

Ruby diaphragm pumps offer excellent self-priming performance thanks to their automatic priming; they tolerate short periods of dry running, but prolonged dry running should be avoided to preserve diaphragm life. Their submersible operation is possible thanks to specially designed materials and seals; the manifold flow direction can be easily reversed on-site, simplifying installation adaptation.

Composite PTFE membranes offer a long service life and tool-free assembly/disassembly; the recessed internal/external piston membrane architecture and simplified hydraulic circuit reduce the need for spare parts. Aside from a supply of clean, dry air, precise filter/regulator adjustment, and periodic visual inspection of the valves/membranes, they require no maintenance, significantly reducing downtime and maintenance costs.