Pompe Cucchi has introduced new stainless-steel gear-metering pumps. The series was designed in order to allow the use of steel bars in the manufacturing of the pump components. The N series pumps are suitable in applications where both constant pressure and precision in dosage are required. The absence of pulsation on the delivery side of the pump optimises the accuracy of the flow meter reading and the prompt response to the capacity changes assures the correct dosage at all times. These factors are fundamental for the management of any system and for maintaining the qualitative characteristics of the product pumped. The capacities vary from a minimum of 0.5 l/h. to a maximum of 50.000 l/h. with maximum working pressure of 15 bar. Main applications include chemicals, cosmetics, food, textiles, etc. The standard version is made of AISI 316L stainless steel. Pumps obtained from steel bars and not from casting guarantee homogeneous and uniform material quality, thus avoiding cracking or shrinkage. Special versions in titanium, Hastelloy, Sanycro 28, PVDF, or any other machinable material, may be made on request. The shafts and gears, which are also made of AISI 316L stainless steel, are put through special anti-wear and anti-seizure heat treatment. For extra heavy duty working conditions with partial cavitation phenomenon or for the transfer or dosage of deionized and demineralized water or liquids having high vapour tensions, a new thermal treatment has been available since 1996 called âHHâ? (High Hardness). This modern thermal treatment considerably increases the resistance to wear of the gears and confers major protection from corrosion caused by chemical agents, an extremely low friction factor and a very high wear resistance to the treated parts. It also enables the achievement of surface hardness of 4000 Vickers.