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Directional Spool Valvesdirectional spool valves
HDM Monoblock
Series HDM directional control valves feature compact, cast monoblock bodies and have high operating pressure ratings. Available in 6 different sizes, the large range of spools, spool operators, levers and auxiliary shock/anti-cavitation valves.
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.
Technical data
| Layer | Number of Spools | Nominal flow I/min | Max. port A/B pressure bar | Tank pressure bar |
| HDM140 | 1 | 40 | 320 | 30 |
| HDM11P | 2-6 | 45 | 320 | 30 |
| HDM11S | 1-6 | 45 | 400 | 30 |
| HDM18 | 1-4 | 70 | 400 | 30 |
| HDM19WL | 3 | 70 | 320 | 30 |
| HDM25 | 1-2 | 100 | 320 | 30 |
- Operating temperature: -10 ... + 80°C
- Oil viscosity: 16 - 75 mm²/s (cSt)
- Oil filtration: <30 µ
Monoblock valves with pipe-threaded ports, and can be directly installed into a hydraulic system.
Thanks to their "sandwich" design, these valves are like a versatile building-block system. The appropriate elements are chosen to comply with system requirements and are then assembled together to form a complete hydraulic control system.
HDS
Series HDS directional control valves are available in 5 different sizes, and with parallel, serial, serial/parallel or load sensing circuitry
Sectional directional valves, series HDS
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 5 different sizes, and with parallel, serial, serial/parallel or load sensing 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.
Technical data
| Layer | Number of Sections | Inlet flow I/min | Max. port A/B pressure bar | Tank pressure bar |
| HDS07 | 1-10 | 25 | 320 | 20* |
| HDS11 | 1-10 | 45 | 320 | 30 |
| HDS15 | 1-10 | 45 | 320 | 30 |
| HDS20 | 1-10 | 70 | 320 | 30 |
| HDS30 | 1-10 | 70 | 320 | 30 |
| HDS34 | 1-10 | 100 | 320 | 30 |
- Operating temperature: -10 ... +80 °C
- Oil viscosity: 16 - 75 mm²/s (cSt)
- Oil filtration: <25 µm
* peaks up to 250 bar
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