HYDRAULIC GEAR PUMPS galore!

These hydraulic gear pumps have high overall efficiencies, normally above 90%. The product range is available in various mounting formats including SAE and DIN.

A variety of materials used within the construction process ensure suitability for a wide range of fluids and environments. Now including the new range of cast iron bodied, cast iron flanged, hydraulic gear pumps for applications requiring high pressures, optimal performance and endurance.

A complete range of reversible units and gear motors compliment the range of hydraulic pumps for all types of industrial process, heavy plant, agricultural, offshore marine and commercial equipment.

You name the application, we specify the gear pump.

These hydraulic gear pumps and motors can work under heavy duty operating conditions and transmit high hydraulic power, feature good hydraulic, mechanical and volumetric efficiency, low noise level and, last but not least, compact dimensions and low weight to power ratio. Ideal for both industrial and mobile industry sectors.

The basic components consist of a gear set supported by two aluminum bushings, a body, a securing flange and a cover.

The shaft of the driving gear projecting beyond the flange mounts a seal ring coupled with a metallic ring to strengthen the setup. Both rings are held in place by an elastic securing ring.

The body is made of a special aluminium alloy with high strength for minimized deformation even when subject to high pressure. There are also cast iron bodied pumps and motors now available for applications requiring high pressures, optimal performance and endurance. Flange and cover are made out of cast iron or aluminium alloy, depending on the model series type, manufactured through a process of continuous flow casting and with a final surface treatment of phosphating.

Gears are made of special grade steel. Their manufacturing process includes case-hardening and quench hardening. The gears are ground and fine finished to achieve a high degree of surface finishing. Good tooth profile design and geometric proportions ensure low pulsation levels and low noise levels during motor operation.

Bushings are made of special low-friction and high-resistant aluminium alloy and manufactured from die-casting that have excellent high strength and anti-friction characteristics. Also equipped with anti-friction DU bearings with tight tolerance.

Special and symmetric compensation zones onto bushings, insulated by special preformed seals with special anti-extrusion ring, allow full free axial and radial movement to the bushings, which is proportional to motor operating pressure. In this way, internal leakage is dramatically reduced, ensuring very good pump performance (both in terms of mechanical and total efficiencies) and proper lubrication of pump moving parts.

This kit is sent already assembled but uncalibrated. The 1PVM spring (number 4) for medium - high calibrations
is provided unassembled.
The relief valve is calibrated using the grub screw (number 5).
When used at pressure higher than 90 bar the spring already assembled in the cartridge must be changed as follows:

» Unscrew the watertight cap (number 9) and the grub screw (number 5).
» Change the medium - low calibrated spring (number 3) with the medium - high calibrated spring (number 4).
» Screw the grub screw (number 5) on top of the cartridge (number 2) until the desired pressure is reached.
» Screw the watertight cap by a 30/35 Nm bolt torque equivalent to 22.1/25.8 lb ft.

Also the smaller 1P Series Gear Pumps and 0.25 - 0.5 Series Micro Gear Pumps.

A range of mounting flanges, output shafts, and ports are available to suit a variety of applications.

For quick cross reference grid of all gear pump and motor capabilities see www.jbj.co.uk/marzocchigearpumps.html

» Link to technical specifications of each series of gear pump and gear motor.

» Link to 2 stage, high / low gear pumps ideal pump for applications which require a fast approach and /or return of the actuator at low loads and slow motion of the actuator at high loads. eg. waste compactors, log splitters, clamping, crimping, etc.

» Link to low noise, high efficiency, low pulsation gear pumps 15 dBA lower noise levels than standard gear pumps, up to 20 dBA depending on size of pump. Higher working pressures up to 300 bar and higher performance.

» Link to Gear pump summary.

» Link to jbj Techniques, UK distributor for Concentric AB hydraulics. (formerly Haldex).

» Link to Haldex GPA low noise internal gear pumps.

High quality mechanical and fluid power products are always available straight from our comprehensively stocked warehouse, but, we are more than that! If you need more, be it the smallest drive component through to complex drive line component packages, then speak to our experienced sales team who will provide a solution based upon your application requirements.

An experienced and dedicated team of technical sales engineers are on hand to work with customers and deliver results. The markets where jbj operate are tough and time sensitive. In such circumstances customers need reliable solution partners, people who are conscious of deadlines, innovative in design and always willing to seek the best solution for the customers' needs.
On all counts, jbj Techniques Limited deliver. From specification, through technical advice, manufacture and support, together with our extensive product database, jbj Techniques provide a comprehensive and valued service to the power transmission and hydraulic industries.

Whether you are running an industrial plant, or simply looking for the right power take-offs for your heavy machinery, heavy plant, mobile applications, or offshore marine machinery this guide is sure to help you select the right pump drive for your needs. « Link