Linde HPR-02 Self-regulating pumps for open circuit operation

Linde HPR-02 Self-regulating pumps for open circuit operation
HPR-02 Self-regulating pumps for open circuit operation

Linde is a manufacturer of axial piston pumps for open and closed circuits. The company’s offerings include variable and self regulating pumps. The products are suitable for a peak pressure of up to 500 bar in heavy duty hydraulic applications.

Legal emission regulations force manufacturers of mobile machinery to optimize the noise emission of their products. Since secondary measures tend to be expensive and less efficient Linde Hydraulics prefers to fight the noise where it is generated: by optimally connecting an additional volume directly next to the commutation of the HPR-02 pump, Linde Hydraulics invented the SPU silencer. The adaptive SPU reduces pressure pulsations in the regulating pump over the entire range of operation – without loss of power.

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Features

Design characteristics

  • axial piston pump in swashplate design for high pressure open circuit systems
  • clockwise or counter clockwise rotation
  • self-priming at high nominal speed
  • tank pressurization or swash angle reduction for high speed applications
  • adaptive noise optimization SPU
  • decompression fluid is discharged via pump housing to keep suction side calm
  • exact and robust load sensing controllers with or without swash plate position feedback

Product advantages

  • optimum interaction with Linde LSC control valves and LinTronic
  • energy saving operation by ‘flow on demand’-control
  • dynamic response
  • excellent suction up to rated speed
  • noise optimization over the whole range of operation
  • compact design
  • high power density
  • high reliability
  • long working life

Technical Data

HPR-02 55 75 95 105 135 165 210 280 105D 125D 165D
Max. displacement cc/rev 55 75.9 95 105 135.7 163.6 210.1 281.9 210 250 331.2
Max. operating speed (without tank pressurization) rpm 2700 2500 2500 2500 2350 2400 2100 2000 2450 2400 2100
Max. oil flow* l/min 148.5 189.8 237.5 246.8 312.1 392.6 441.2 563.8 514.5 600.0 695.5
Nominal pressure bar 420 420 350 420 420 350 420 420 420 350 420
Max. pressure** bar 500 500 420 500 500 420 500 500 500 420 500
Torque (Δp=420 bar) Nm 368 507 529 702 907 911 1404 1884 1245 1245 1964
Corner power kW 104 132.8 138 172.7 218.5 229 308.8 394.7 319.4 337 431.8
Weight approx. (without oil) kg 39 39 44.5 50 65 74 116 165 96 113 177
* theoretical data of a single unit without efficiency effects
** highest transient pressure, that can temporarily occur

Download Datasheet: Linde HPR-02 Self-regulating pumps for open circuit operation

Reference: linde-hydraulics.com