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	Picture	Number of spools d’axes	Max. inlet pressure (P) bar	Max. work port press. (A/B) bar	Max. tank pressure bar	Data sheet
HDM140		1	40	250	300	HDM140_200-P-991210
HDM11P		2 - 6	45	250	300	HDM11P_200-P-991210
HDM11S		1 - 6	45	250	300	HDM11S_200-P-991210
HDM11S/3PQ		3	45	250	300	HDM11S3PQ_200-P-991229
HDM15/2		2 - 10	60	250	300	HDM_HDS15_200-P-991228
HDM18		1 - 4	70	300	350	HDM18_200-P-991210
HDM19WL		3 - 10	80	250	300	HDM19WLEH_200-P-991243
HDM19EH		3	80	290	300	HDM19WLEH_200-P-991243
HDM25		1 - 2	100	250	300	HDM25_200-P-991210

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