Danfoss ASC User guide
MAKING MODERN LIVING POSSIBLE
Technical Information
Series ASC
Anti Spin Control Valve
powersolutions.danfoss.com
Technical Information |
Series ASC Anti Spin Control Valve |
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Revision history |
Table of revisions |
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Date |
Changed |
Rev |
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March 2014 |
Converted to Danfoss layout - DITA CMS |
BA |
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July 2002 |
First edition |
AA |
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520L0525 • Rev BA • March 2014 |
Technical Information |
Series ASC Anti Spin Control Valve |
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Contents |
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Overview |
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Description.......................................................................................................................................................................................... |
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Features................................................................................................................................................................................................ |
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Further System Components....................................................................................................................................................... |
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Sectional view |
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Circuit diagram |
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System schematic diagram |
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Technical specifications |
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General specifications..................................................................................................................................................................... |
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Technical data.............................................................................................................................................................................. |
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Fluid specifications..................................................................................................................................................................... |
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General Technical Specifications |
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Pressure Limits................................................................................................................................................................................ |
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Hydraulic Fluids.............................................................................................................................................................................. |
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Temperature and Viscosity......................................................................................................................................................... |
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Fluid and Filtration........................................................................................................................................................................ |
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Independent Braking System.................................................................................................................................................... |
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Reservoir............................................................................................................................................................................................ |
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Functional Description |
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General Description...................................................................................................................................................................... |
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ASC-Valve function........................................................................................................................................................................ |
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Application Considerations |
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Availability |
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Available Options........................................................................................................................................................................... |
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Technical data |
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Pressure drop................................................................................................................................................................................... |
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Remaining flow at maximum closed position..................................................................................................................... |
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Spool stroke versus current........................................................................................................................................................ |
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Outline Dimensions |
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520L0525 • Rev BA • March 2014 |
3 |
Technical Information |
Series ASC Anti Spin Control Valve |
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Overview
Description
The Danfoss Anti Spin Control valve (ASC-valve) is used e.g. in a propel drive line. The flow provided by a pump is split equally and ported to two propel motors, ensuring, both run at the same speed under all load, pressure, flow, and vehicle steering conditions. This prevents wheel slip and provides optimum vehicle traction. The ASC-valve concept allows therefore a wide variety of applications whenever equal flow share is demanded.
The ASC-valve in conjunction with a SUSMIC S1X microprocessor as well as steering and speed sensors combines the capabilities of modern digital electronics with the worldwide proven Danfoss hydrostatic components, to enhance the machine performance and operation.
The microprocessor-based SUSMIC S1X provides software flexibility and is designed for the future. With easy-to change parameters (in software) it is possible to make an individual setup for different machine types.
Features
•Rugged design for mobile applications.
•Two “remaining flow” options available.
•Supply voltage 12 VDC or 24 VDC.
•Easy to service.
•Flexibility: 2 - 4 motors.
•Active while steering.
•Software optimization/adaption without hardware (orifice) changes.
•Individual setup per software:
‒Selection of different steering modes
‒Vehicle geometry
‒Track width
‒Wheel base
‒Wheel diameter
‒etc.
Further System Components
•S1X-16 G2 AMP K196 S1X Electronic w/o CAN
•S1X-26 G2 AMP K196C S1X Electronic w CAN
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520L0525 • Rev BA • March 2014 |
Technical Information |
Series ASC Anti Spin Control Valve |
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Sectional view
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A |
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M7 |
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X3 |
P |
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L |
M8 |
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B |
P001 968 |
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520L0525 • Rev BA • March 2014 |
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Technical Information |
Series ASC Anti Spin Control Valve |
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Circuit diagram
A |
M7 |
X3 |
M8 |
B |
P |
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L |
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P001 969 |
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520L0525 • Rev BA • March 2014 |
Technical Information |
Series ASC Anti Spin Control Valve |
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System schematic diagram
Circuit Diagram – ASC-valve and System Components
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M3 |
L2 |
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A |
M1 |
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M4 |
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M5 |
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M |
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M2 |
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B |
L1 |
S |
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ASC-valve
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A |
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M7 |
L |
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X3 |
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M8 |
P |
B |
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P001 970 |
Ports:
A, B = Main pressure ports M4, M5 = Gauge port - servo pressure
S = Suction port - charge pump M7, M8 = Gauge port - control pressure L, L1, L2 = Case drain X3 = Control pressure supply port
M1, M2 = Gauge port for A and B M3 = Gauge port - charge pressure
Above schematics show the function of a hydrostatic transmission using a Series 90 Axial Piston Variable Displacement Pump with manual displacement control (MA) and two Fixed Displacement Hydraulic Motors with brakes and brake valve, controled by an ASC-valve.
520L0525 • Rev BA • March 2014 |
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Technical Information |
Series ASC Anti Spin Control Valve |
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Technical specifications
General specifications
Most specifications for the ASC-valve are listed below. For definitions of the various specifications, see the related pages in this publication.
General specifications
Valve type |
Electrical proportional two-spool ASC-valve |
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Installation position |
Discretionary |
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Other system requirements |
Circuit overpressure protection, suitable reservoir |
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Specific Data |
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Order number |
507 479 |
507 832 |
507 831 |
507 833 |
518 033 |
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Voltage |
12 VDC |
24 VDC |
12 VDC |
24 VDC |
24 VDC |
Weight |
7.85 kg [17.3 lb] |
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Maximum flow (at port P) |
120 l/min [32 US gal/min] |
60 l/min [16 US gal/min] |
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Remaining flow in closed position at 400 |
12 l/min [3.2 US gal/min] |
< 2 l/min [0.5 US gal/min] |
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bar [5800 psi] |
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Case drain ports |
1 |
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2 |
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Hydraulic pipe connections |
Main pressure ports: SAE flange + SAE straight thread O-ring boss. |
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Remaining port: SAE straight thread O-ring boss. |
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Electric connections |
AMP Junior Timer, 12 VDC + 24 VDC |
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Technical data |
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Case pressure |
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bar |
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[psi] |
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Maximum pressure |
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3.0 |
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[44.0] |
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System pressure range |
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bar |
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[psi] |
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Maximum pressure |
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480 |
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[7000] |
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Control pressure |
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bar |
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[psi] |
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Minimum control supply pressure (X3) |
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20 |
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[290] |
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Maximum control supply pressure (X3) |
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30 |
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[435] |
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Operating current |
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12 VDC |
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24 VDC |
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Standby current |
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300 mA |
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150 mA |
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Required max. current |
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1200-1300 mA |
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600-650 mA |
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8 |
520L0525 • Rev BA • March 2014 |
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