high/low 2 stage gear pumps available from jbj Techniques Limited

an excellence in engineering www.jbj.co.uk/ .html FTP-gear-pumps Marzocchi FTP pumps are based on ELIKA Gear Technology that reduces the noise level by an average of 15 dBA compared with a conventional external gear pump. The helical gears ensure the continuity of motion despite the low number of teeth. FTP pumps are perfectly interchangeable with standard gear pumps. The low number of teeth reduces the fundamental frequencies of the pump noise, therefore lowering sound levels. The shape of the Elika profile, patented by Marzocchi Pompe, eliminates the encapsulation phenomenon typical of standard gear pumps, remedying the source of themain cause of noise and vibrations. By reducing the pressure-oscillations and vibrations produced by the pump and transmitted to the other components, the noise of the hydraulic system itself is reduced. Specific compensation areas in the flange and cover, insulated by special gaskets reinforced with anti-extrusion, allow for fully free axial and radial movement of the bushings. Ideal for low-pressure, low viscosity, lubrication applications such as fire-resistant fluids. The FTP gear pump fromMarzocchi is an ideal solution for low-pressure lubrication applications where low-viscosity fluids are required, such as fireresistant fluids. Typical applications include large lubrication systems, lubrication of the guides of machine tools, and the lubrication and cooling of tools themselves. Fire-resistant fluids are used whenever there is a possibility that a hydraulic fluid (also used for lubrication) may encounter a source of ignition, such as the surface of very hot equipment. Fire-resistant hydraulic fluids are specially formulated so they are more difficult to ignite and do not propagate a flame froman ignition source. There are several types of fire-resistant fluids and they are generally classified as follows: oil and water emulsions, water-polymer solutions, and anhydrous synthetics. More specifically, the International Standards Organization (ISO) further classifies these fluids as follows: HFAE – oil-in-water emulsions, typically with more than 80%water content; HFAS – synthetic aqueous fluids, typically with more than 80%water content; HFB – water-inoil emulsions, typically with more than 40%water content; HFC – water polymer solutions, typically with more than 35%water content (also known as glycol solutions, polyalkylene glycol solutions or water glycols); HFDR – synthetic anhydrous fluids composed of phosphate esters; and HFDU – synthetic anhydrous fluids other than phosphate esters. Examples include polyol esters and polyalkylene glycols. The only fire-resistant fluids that are completely incompatible with gear pumps are the HFDR ones; for all the others, it is possible to obtain a configuration that makes them compatible. To avoid fast wear of the sliding contact parts, FTP pumps can be supplied, depending on the type of application with bronze or bronze/PTFE thrust plates. These FTP helical gear pumps are available in versions with or without a relief valve built into the cover, and maximum working pressure is 50 bar. The gear pumps have very high specifications for rotation speed and viscosity range. FTPpumps are available in clockwise rotation whilst a counter-clockwise rotation version is currently under development. www.jbj.co.uk/ftp-gear-pumps.html