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
Revision history Table of revisions
Date Changed Rev
March 2014 Converted to Danfoss layout - DITA CMS BA
July 2002 First edition AA
2 520L0525 • Rev BA • March 2014
Technical Information
Series ASC Anti Spin Control Valve
Contents
Overview
Description..........................................................................................................................................................................................4
Features................................................................................................................................................................................................4
Further System Components.......................................................................................................................................................4
Sectional view
Circuit diagram
System schematic diagram
Technical specifications
General specifications.....................................................................................................................................................................8
General Technical Specifications
Pressure Limits................................................................................................................................................................................ 10
Hydraulic Fluids.............................................................................................................................................................................. 10
Temperature and Viscosity.........................................................................................................................................................10
Fluid and Filtration........................................................................................................................................................................ 11
Independent Braking System....................................................................................................................................................12
Reservoir............................................................................................................................................................................................12
Functional Description
General Description...................................................................................................................................................................... 13
ASC-Valve function........................................................................................................................................................................13
Application Considerations
Availability
Available Options...........................................................................................................................................................................16
Technical data
Pressure drop...................................................................................................................................................................................17
Remaining flow at maximum closed position.....................................................................................................................17
Spool stroke versus current........................................................................................................................................................18
Outline Dimensions
Technical data.............................................................................................................................................................................. 8
Fluid specifications.....................................................................................................................................................................9
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Technical Information
Overview
Description
Features
Series ASC Anti Spin Control Valve
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.
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
•
4 520L0525 • Rev BA • March 2014
L
B
A
P
M8
M7
X3
P001 968
Technical Information Series ASC Anti Spin Control Valve
Sectional view
520L0525 • Rev BA • March 2014 5
A
M7 X3
M8
B
P
L
P001 969
Technical Information Series ASC Anti Spin Control Valve
Circuit diagram
6 520L0525 • Rev BA • March 2014
M
B P B
L
L2
L1
M2
M1
M4
M5
M3
A
A
S
P001 970
M8
X3
M7
ASC-valve
Technical Information
System schematic diagram
Series ASC Anti Spin Control Valve
Circuit Diagram – ASC-valve and System Components
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.
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Technical Information Series ASC Anti Spin Control Valve
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
Installation position Discretionary
Other system requirements Circuit overpressure protection, suitable reservoir
Specific Data
Order number 507 479 507 832 507 831 507 833 518 033
Voltage 12 V
Weight 7.85 kg [17.3 lb]
Maximum flow (at port P) 120 l/min [32 US gal/min] 60 l/min [16 US gal/min]
Remaining flow in closed position at 400
bar [5800 psi]
Case drain ports 1 2
Hydraulic pipe connections Main pressure ports: SAE flange + SAE straight thread O-ring boss.
Electric connections AMP Junior Timer, 12 VDC + 24 V
DC
24 V
DC
12 V
DC
24 V
DC
12 l/min [3.2 US gal/min] < 2 l/min [0.5 US gal/min]
Remaining port: SAE straight thread O-ring boss.
DC
24 V
DC
Technical data
Case pressure
bar [psi]
Maximum pressure 3.0 [44.0]
System pressure range
bar [psi]
Maximum pressure 480 [7000]
Control pressure
bar [psi]
Minimum control supply pressure (X3) 20 [290]
Maximum control supply pressure (X3) 30 [435]
Operating current
12 V
DC
Standby current 300 mA 150 mA
Required max. current 1200-1300 mA 600-650 mA
24 V
DC
8 520L0525 • Rev BA • March 2014
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