Sectional Directional Valves, Series HDS...

Description

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 8 different sizes, and with parallel, serial, serial/parallel,  Load Sensing and Flow Sharing 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

Type Number of sections Nominal flow rate
l/min
Max. inlet pressure (P)
bar
Max. work port press. (A/B)
bar
HDS07 1 - 10 25 250 320
HDS11 1 - 10 45 250 320
HDS15 1 - 10 60 250 320
HDS16 1 - 10 60 290 320
HDS21 1 - 10 80 290 320
HDS24 1 - 10 130 280 320
HDS30 1 - 10 120 250 320
HDS34 1 - 10 180 300 350
  • Fluid temperature: from -20 to +80 °C
  • Viscosity operating range: 15 - 75 mm²/s (cSt)
  • Max contamination level: 21/19/16 - ISO 4406:1999 (NAS 1638 class 10)
  • Max contamination level for electro-hydraulic applications: 20/18/15 - ISO 4406:1999 (NAS 1638 class 9)

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