Axial-piston pumps НК type of variable capacity

Axial-piston pumps НК type of variable capacity
Axial-piston pumps НК type of variable capacity

The pumps of HK type find application in hydraulic actuators of ship mechanisms and other hydraulic systems. The pumps are used in hydraulic systems of all circuit types. As for control, the following versions are available:

For closed circuit:

  • with remote hydraulic control according to control signal pressure, with power transducer or without it;
  • with mechanical control by means of a servo spool;
  • with remote hydraulic control according to the volume of fluid entering the spaces of servo drive controls.

For open circuit:

  • with a power transducer.

For semi-closed circuit:

  • with remote hydraulic control according to the pressure of control signal, with inflow valves, with power transducer or without it;
  • with remote hydraulic control according to the volume of fluid entering the spaces of servo drive controls.

Available is hand-driven version with smooth control of constant delivery by means of a flywheel. The pumps design with a power regulator ensures constant power consumption, if load changes in the system.

Pressure-controlled pumps fitted with power transducers allow to limit power consumption to a certain value which is defined by setting of power transducer.



Basic technical data
Parameter Standard size rating
НК 20 НК 25 НК 32 НК 40 НК 50
Volumetric capacity at maximum controlled parameter, cm³ 54,8 107 225 468 915
Pressure, MPa:
- rated 16
- maximum 25 35
Rotational frequency at the pressure of 16 MPa, rpm:
- rated 1450 1450 970 970 735
- maximum 3150 2500 2000 1600 1250
- minimum 400 400 400 300 300
Rated delivery at maximum controlled parameter, l/min 75,5 147,4 207,3 440 650
Rated power at maximum controlled parameter, kW 21,7 42,2 60 125 185
Delivery coefficient, not less than 0,95 0,97
Kinematic viscosity of working fluid, m²/s (sSt) 0,05…10 (5…1000)
Mass, kg 85 130 215 550 995
Overall dimensions, mm:
- L 474 547 683 897 1090
- B 429 449 549 721 834
- H 404 459 528 792 937

Note: Given here is a maximum value of size "B". It depends on a control system version.

The pumps can be customized in a short time.

Pumps of НК type are approved by the RF Register of Shipping for application on sea-going vessels.