3 piston semi-hydraulic diaphragm pumps engineered for a smoother and quieter operation. Medium pressure pumps (up to 4 bar - 58 P.S.I.) and medium flow rate, in light alloy, compact design and fitted with mounting rails. All moving parts are completely submerged in oil. Piston sleeves are made of self-lubricating cast iron; 2 piston rings for each piston are used to deliver high volumetric efficiency. All parts in contact with spray material are anodized and the check valves are in stainless steel. For quick and flexible installation they are available in the following versions: VF-VC-VM-VS.