IR ARO Piston & Extrusion Pumps & Accessories (Authorised Importer/ Distributor). The IR ARO Industrial Piston pump range is from 1:1Ratio 2 ball pumps with 2″ Airmotors through to 65:1 Ratio Chop Check Extrusion pumps with 12” Airmotors. Within the ARO piston pump range, flows up to 143 litres / Minute, and With Viscosities of … Continue reading IR ARO Piston & Extrusion Pumps