Table Of Contents - Danfoss Series 90 Technical Information

Technical Information
Contents
General Description
Technical Specifications
Operating Parameters
System Design Parameters
Master Model Code
Control Options
Series 90 Axial Piston Pumps
Series 90 Family of Pumps and Motors.....................................................................................................................................5
PLUS+1 Compliant Controls and Sensors................................................................................................................................5
Design...................................................................................................................................................................................................6
Pictorial Circuit Diagram................................................................................................................................................................ 6
System schematic.............................................................................................................................................................................7
General Specifications.................................................................................................................................................................... 8
Features and Options......................................................................................................................................................................8
Operating Parameters.....................................................................................................................................................................9
Fluid Specifications..........................................................................................................................................................................9
Overview........................................................................................................................................................................................... 10
Input Speed......................................................................................................................................................................................10
Independant Braking System.................................................................................................................................................... 10
System Pressure..............................................................................................................................................................................10
Servo Pressure.................................................................................................................................................................................11
Charge Pressure..............................................................................................................................................................................11
Case Pressure...................................................................................................................................................................................11
External Shaft Seal Pressure....................................................................................................................................................... 12
Temperature and Viscosity.........................................................................................................................................................12
Filtration System.............................................................................................................................................................................13
Filtration Options........................................................................................................................................................................... 13
Suction filtration - Option S................................................................................................................................................. 13
Charge pressure filtration (partial charge pump flow)............................................................................................... 14
Remote charge pressure filtration......................................................................................................................................14
Fluid Selection.................................................................................................................................................................................15
Reservoir............................................................................................................................................................................................15
Case Drain.........................................................................................................................................................................................15
Pump Life.......................................................................................................................................................................................... 16
Charge Pump...................................................................................................................................................................................16
Charge pump sizing/selection.............................................................................................................................................16
Bearing Loads and Life.................................................................................................................................................................16
Applications with external shaft loads..............................................................................................................................17
Understanding and Minimizing System Noise....................................................................................................................17
Sizing Equations............................................................................................................................................................................. 18
Mounting Flange Loads...............................................................................................................................................................18
Series 90 Master Model Code.................................................................................................................................................... 21
3-Position (FNR) Electric Control - DC, DD............................................................................................................................ 26
Response time........................................................................................................................................................................... 27
Electric Displacement Control (EDC), Options KA, KP, KT................................................................................................27
Features and Benefits..............................................................................................................................................................28
Response time........................................................................................................................................................................... 31
Pump output flow direction vs. control current............................................................................................................31
Manual Over Ride (MOR)............................................................................................................................................................. 31
Hydraulic Displacement Control (HDC), Option HF...........................................................................................................32
Operation.....................................................................................................................................................................................32
Features and Benefits..............................................................................................................................................................32
Response time........................................................................................................................................................................... 33
Pump output flow direction vs. control pressure......................................................................................................... 34
Manual Displacement Control (MDC), Options MA, MB.................................................................................................. 34
Features and benefits..............................................................................................................................................................34
External control handle requirements..............................................................................................................................35
520L0603 • Rev 0804 • March 2016 3