Danfoss Series 90 User Manual

General Description
Series 90 Family of Pumps and Motors.....................................................................................................................................5
PLUS+1 Compliant Controls and Sensors................................................................................................................................5
Design...................................................................................................................................................................................................6
Pictorial Circuit Diagram................................................................................................................................................................6
System schematic.............................................................................................................................................................................7
Technical Specifications
General Specifications.................................................................................................................................................................... 8
Features and Options......................................................................................................................................................................8
Operating Parameters.....................................................................................................................................................................9
Fluid Specifications..........................................................................................................................................................................9
Operating Parameters
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
System Design Parameters
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
Master Model Code
Series 90 Master Model Code.................................................................................................................................................... 21
Control Options
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
Technical Information
Series 90 Axial Piston Pumps
Contents
520L0603 • Rev 0804 • March 2016 3

Danfoss Series 90 Specifications

General

Brand	Danfoss
Model	Series 90
Category	Water Pump
Language	English