Monoblock Directional Valves, Series HDM

Description

Series HDM directional control valves feature compact, cast monoblock bodies and have high operating pressure ratings.

Available in 9 different sizes, the large range of spools, spool operators, levers and auxiliary shock/anti-cavitation valves make the HDM series especially suitable for use in medium-complexity circuits. They are also very suitable for straight-forward applications in which a particularly small overall size is required.

The HDM series is available in the following versions: open centre, parallel/series, closed centre and carry-over.

A further notable feature is the very low level of internal spool leakage.

Advantages

  • Low weight, small dimensions
  • Operating pressure up to 350 bar
  • Excellent price/performance ratio
  • Elimination of potential leakage between sections
  • Easy maintenance

Technical Data

Type Number of spools d’axes
-
Nominal flow rate
l/min
Max. inlet pressure (P)
bar
Max. work port press. (A/B)
bar
HDM140 1 40 250 320
HDM11P 2 - 6 45 250 320
HDM11S 1 - 6 45 250 320
HDM11S/3PQ 3 45 250 320
HDM15/2 2 - 10 60 250 320
HDM18 1 - 4 70 300 350
HDM19WL 3 - 10 80 250 320
HDM19EH 3 80 290 320
HDM25 1 - 2 100 250 320
  • Fluid temperature: from -20 to + 80°C
  • Viscosity operating range: from 15 to 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 manual lever control, 2-spool combi-lever, flexible cable
  • With spool-activated microswitch
  • With ON-OFF solenoid operation
  • With hydraulic, pneumatic, proportional hydraulic and electro-hydraulic operation
  • With mechanical-release check valves in A/B ports
  • With anti-shock and anti-cavitation relief valves in A/B ports

Applications

  • Tractors
  • Agricultural machines
  • Wheel loaders  
  • Front loaders
  • Lift trucks
  • Log splitters
  • Truck-mounted cranes  
  • Back-hoes
  • Construction machinery