The range of positive displacement, hydraulic gear pumps is available in single or multiple pump format and can be supplied with integral relief valve on request.
Not just huge stocks of gear pumps available for next day delivery but the technical expertise to specify for complex and simple applications alike . . . you name the application, we specify the pump.
These external gear pumps feature versatility, strength and long useful life
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 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.
Links to further gear pump information:
Link to high pressure seal
radial sealing at the shaft that can bear enormous internal over-pressures without resulting in damage.»
Design simplicity versatility, strength and long useful life
. Simple construction ensures limited purchase costs and servicing.»
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, low pulsation gear pumps
15dBA lower noise levels than standard gear pumps. 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
Basic design and construction of external gear pumps.
Positive displacement, external gear pumps, the most popular pumps used in modern hydraulics systems feature versatility, strength and long useful life.
Their simple construction, compared to other types (piston, orbital, etc) ensures cost effective purchasing and servicing.
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/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.
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.