Pumps are designed to work in tough conditions & are ideal for use with medium to high viscosity oils (up to SAE 130) for transferring over short distances mostly used with trolley mounting kits. All metal construction, fully CNC machined with hardened wear resistant moving parts. Reciprocating piston operated 2-1/2” (63 mm) dia.Air Motor. Available in three different sizes - Stub, 16 Gal & 55 Gal version. Stub Pumps are supplied with Non Return Valve threaded 1” (F) for use on the bottom of the SuctionTube. Other pump lengths have a built in Strainer at pump inlet to keep contaminants away. Pumps are single acting with discharge up to 14 LPM (3.70 GPM). Air Consumption: 230 LPM (61 GPM)