ELI3 series
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The new Marzocchi Low - noise and Low - ripple gear pump ELI3 series up to 87 cm3/rev ELIKA, Marzocchi's new proposal for the gear pump market, is a perfect fit for all those applications that require low noise levels. The use of ELIKA gear pump eliminates adverse noise effects on humans and on the surrounding environment. The ELIKA reduces the noise level by an average of 15 dBA compared with a conventional external gear pump. ELIKA is a patented product. Marzocchi extends the ELIKA family introducing the new ELI3 group, with displacements from 20.4 to 87.1 cm3/rev.

ELI3 includes pumps with displacements from 20.4 to 87.1 cm3/rev; perfectly interchangeable with our standard gear pumps in the ALP3 and GHP3 series. The maximum operating pressures are similar to those of the GHP series and extend up to 300 bar. The helical gears ensure the continuity of the motion despite the low number of teeth. The low number of 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,...

The pump structure minimizes the internal leakage, efficiency under all conditions. This feature makes the Elika pump suitable for work operations with low speed and high pressure. eliminated in the Elika pumps, can overheat Comparing the characteristics of the Elika pump with other kind of volumetric pumps, it is possible to see that they have a very high range of applications in terms of: the rotation viscosity range. Above: comparison between the different fields of use of other kinds of volumetric pumps.

HIGH PRESSURE GEAR PUMPS The very low noise level generated by the ELIKA pumps makes this product particularly suitable for those application where screw pumps, vane pumps or internal gear pumps are generally used. The simple construction, small size and high performances of ELIKA make this new product very competitive. Noise comparison between: standard external gear pump, dual flank gear pump, internal gear pump, vane pump, ELIKA pump, pressure = 200 bar. The low pulsation reduces the induced vibration in the machines. The lower frequency of the ELIKA pump produces a more pleasant sound....

INSTALLATION NOTES Please strictly follow assembly and use indications given in this catalogue for top performance, longer life and noise of the ELI Marzocchi series. Some general considerations should be made on the hydraulic system, in which the pump must be fitted. Special attention shall be devoted to hydraulic system design and assembly, especially to intake, delivery and return pipes and position of system parts (valves, filters, tanks, heat exchangers and accumulators). Proper safety devices and reliable instruments to avoid fluid turbulence, especially in return pipe to the tank,...

HIGH PRESSURE GEAR PUMPS ELIKA Low absolute filtering power and high p filtering ratio for small particles help ensuring good filtration. It is then very important to limit not only max dimensions, but also the number of smaller particles that pass through the filter. It goes without saying that with an operating pressure increase and according to the system sophistication degree, filtering should become more and more efficient. The filtering system shall always ensure contamination levels not exceeding the values indicates below.

PRESSURE DEFINITION Product tables show three max pressure levels [P1, P2, P3] to which each pump can be used. DIRECTION OF ROTATION Marzocchi ELI series pumps are available in either clockwise or counter-clockwise rotation. Direction of rotation of unidirectional pumps is conventionally defined as follows: when standing before the pump with driving shaft up with is projecting end towards the observer, the pump is rotating clockwise in case of right-hand rotation “D”; therefore, delivery side is on the right, whereas intake side is on the left: The contrary will happen with left-handed...

FREQUENTLY USED FORMULAS Fluid velocity Calculate the velocity [v] of a fluid in a pipe as follows: v = Q / 6 x A [m/s] Q = flow rate [liter/min] A = inside area of pipe [cm2] Delivered flow rate Calculate flow rate [Q] as follows: Q = V x n x ηvol x 10-3 [liter/min] V = displacement [cm3/rotation] n = rotation speed [rpm] ηvol = pump volumetric efficiency (take 0.97 as an indicative value for rotation speeds ranging between 1000 and 2000 rpm) Absorbed torque Calculate necessary torque [M] of a pump subject to a pressure differential between inlet and delivery as follows: M = (V x ∆P) /...

|HIGH PRESSURE GEAR PUMPS Pump standard types: 9 3 = european flange + shaft TO + ports A + standard seals 3A = flange A + shaft C1 + ports A + standard seals Examples: ELI3-D-33.3-T0-A-N = clockwise rotation, 33.3 cm3/rev, european flange, 1:8 tapered shaft, flanged ports A type, standard seals. ELI3A-D-33.3-S1-A-N = clockwise rotation, 33.3 cm3/rev, SAE flange, splined shaft S1, flanged ports A type, standard seals. ELI3A-D-33.3-C1-FA-N = clockwise rotation, 33.3 cm3/rev, SAE flange, cilindrical shaft C1, threaded ports FA3, standard seals. The product data sheets show our...

Accessories supplied with the standard pump: woodruff key (code 522058), M14x1.5 hexagonal nut (code 523017), washer (code 523006). Standard ports: M10, M12 threads depth 20 mm. Please strictly follow assembly and use indications given in this catalogue for top performance and longer life of the ELI Marzocchi series. It is also very important to equip the hydraulic system with a proper filtering unit.

Outlet ELI3AInlet Pump Type Accessories supplied with the standard pump: woodruff key (code 522058), M14x1.5 hexagonal nut (code 523017), washer (code 523006). Standard ports: M10, M12 threads depth 20 mm. Please strictly follow assembly and use indications given in this catalogue for top performance and longer life of the ELI Marzocchi series. It is also very important to equip the hydraulic system with a proper filtering unit.