Hydraulic pumps

Hydraulic pumps – general information

External gear pumps designed for machine tools and fluid power transfer units. They transmit mechanical power supplied from the outside into pressurized hydraulic fluid power. Available in single or multiple gears configuration. Depending on type displacements from 0,7 to 55 [cm3/rev] at maximal working pressure 250 [bar]. Some models are also available as hydraulic engines.

Compact build square flanges with pitch diameter 30, 35, 40, 51, 55 mm and BSP or metric connection threads. Widely used for pump connection. Available with a set of screws, orings and washers as a standard. Made of zinc plated carbon steel or aluminium. Depending on type maximum working pressure to 315 bar.

Types of gear pumps and design versions
Types of gear pumps

Group    Displacement [cm3/rev]    Cobstruction
1    0,7 ÷ 8    mounting plate, body and rear cover made of aluminium
2    4 ÷ 30    mounting plate, body and rear cover made of aluminium
3    22 ÷ 55    cast iron mounting plate and rear cover, body made of aluminium

Design versions
Group    Type    Drive shaft    Mounting plate    Connections
1    01    taper 1:8    rectangular plate Ø25,4 mm    BSP threaded connections
03    taper 1:8    rectangular plate Ø25,4 mm    flange connections
2    01    taper 1:8    rectangular plate Ø36,5 mm    BSP threaded connections
02    taper 1:8    rectangular plate Ø36,5 mm    flange connections
04    taper 1:5    rectangular plate Ø80 mm    flange connections
3    01    taper 1:8    rectangular plate Ø50,8 mm    BSP threaded connections
02    taper 1:8    rectangular plate Ø50,8 mm    flange connections