Monoblock directional valves, series HDM

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

Available in 4 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 400 bar
• Excellent price/performance ratio
• Elimination of potential leakage between sections
• Easy maintenance

Technical data

Number
of spools

Nominal
flow
l/min

Max. port A/B
pressure
bar

Tank
pressure
bar

HDM140

HDM11P

HDM11S

HDM11S/3PQ

HDM15/2

HDM18

HDM19WL

HDM25

1

2 - 6

1 - 6 

3

2 - 10

1 - 4

3

1 - 2

40

45

45

45

60

70

80

100

320

320

400

350

320

400

320

320

30

30

30

30

30

30

30

30

• Operating temperature: -10 ... + 80°C
• Oil viscosity: 16 - 75 mm²/s (cSt)
• Oil filtration: <30 µ

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