Sectional directional valves, series HDS...
Series HDS directional control valves represents a flexible unit construction, the elements of which may be combined into one valve unit as required.
They are available in 5 different sizes, and with parallel, serial, serial/parallel or load sensing circuitry. In addition, the range includes inlet and intermediate flow control sections with either manual or electro-proportional operators. Where accurate control of speed and actuator position is needed, the valves satisfy the most complex hydraulic circuit requirements.
Advantages
- Wide choice of hydraulic circuitry and maximum flexibility
- Electrical and mechanical operators can be combined in the same valve
- Spools can be customised with differing metering ranges
- By-pass solenoid valve and manual safety control in order to prevent unauthorised movement of actuators
- Wide range of valve sections with flow control and priority flow control
Technical data
Number
of
sections
Inlet
flow
l/min
Max. port A/B
pressure
bar
Tank
pressure
bar
HDS07
HDS11
HDS15
HDS20
HDS30
HDS34
1 - 10
1 - 10
1 - 10
1 - 10
1 - 10
1 - 10
25
45
60
80
120
180
320
320
320
320
320
350
20*
30
30
30
30
30
-
Operating temperature: -10 ... +80 °C
-
Oil viscosity: 16 - 75 mm²/s (cSt)
-
Oil filtration: <25 µm
* peaks up to 250 bar
Models
- With operation by manual lever, 2-spool combi-lever, flexible cable
- With spool-activated microswitch
- With ON-OFF solenoid operation
- With hydraulic, pneumatic, proportional hydraulic, electro-hydraulic and proportional electro-hydraulic operation
- With mechanical-release check valves in A/B ports
- With anti-shock and anti-cavitation relief valves in A/B ports
- Flow control sections with either manual or electro-proportional adjustment
Applications
- Tractors
- Agricultural machines
- Harvesting machines
- Earth-moving machinery
