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Monoblock directional valves, series HDM

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

 

 

 


Number
of spools

Nominal
flow
l/min

Max. inlet
pressure
(P) bar

Max.work
port press.
(A/B) bar

HDM140

HDM11P

HDM11S

HDM11S/3PQ

HDM15/2

HDM18

HDM19WL

HDM19EH

HDM25

1

2 - 6

1 - 6 

3

2 - 10

1 - 4

3 - 10

3

1 - 2

40

45

45

45

60

70

80

80

100

250

250

250

250

250

300

250

290

250

320

320

320

320

320

350

320

320

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