JBJ introduces a quieter gear pump; a 15dBA reduction on comparable types
20 June 2012
Marzocchi's new ELIKA gear pump, which is sold and supported in the UK by JBJ Techniques, is suitable for all applications that require low noise levels. Noise levels are reduced by an average of 15dBA compared with a conventional external gear pump. The ELI2 is the first in the new range and includes pumps with displacements from 7 to 35cm3/revolution. The ELI2 is interchangeable with the standard gear pumps ALP2 and GHP2 series.
The maximum operating pressures are similar to those of GHP2 series and extend up to 300bar. The helical gear ensures continuity of motion despite the low number of teeth (which reduces the fundamental frequencies of the pump noise, producing a more pleasant sound).
The particular shape of the profile without encapsulation significantly reduces pressure-oscillations and vibrations produced by the pump and transmitted to the other components, reducing the overall noise of the hydraulic system. Axial forces induced by the helical teeth are optimally balanced in all operating conditions by the axial compensation system integrated in the pump cover.
Specific compensation areas into flange and cover, insulated by special gaskets reinforced with anti-extrusion, allow for fully free axial and radial movement of the bushings, which is proportional to pump operating pressure. In this way, internal leakage is dramatically reduced, ensuring very good volumetric and mechanical pump performances, as well as proper lubrication of moving parts.
ELIKA pumps are available in both uni-directional clockwise or counter clockwise rotation versions.
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