Walvoil DLS control valves
Walvoil DLS control valves
Walvoil DLS pre-compased load-sensing sectional control valves
They are for systems with fixed displacements pumps (open centre versione) or variable displacement pumps (closed centre version) with Load Sensing signal on each working section to pump flow control valve control.
- Load indipendent flow control.
- Load Sensing signal connections on every working section.
|
Nominal flow rating (with 14 bar stand-by) |
On inlet port P |
75 l/min |
|
On ports A and B |
65 l/min |
|
|
Operating pressure |
|
315 bar |
|
Back pressure (max) |
On outlet port T |
25 bar |
|
Internal leakage A(B)→T |
∆p=100 bar |
3 cm3/min |
|
Fluid |
|
Mineral oil |
|
Fluid temperature |
With seals NBR |
from -20° to 80°C |
|
With seals FPM |
from -20° to 100°C |
|
|
Viscosity |
Operating range |
from 15 to 75 mm2/s |
|
Min |
12 mm2/s |
|
|
Max |
400 mm2/s |
|
|
Level of contamination |
|
-/19/16 - ISO 4406 |
|
Ambient temperature |
With mechanical devices |
from -40° to 60°C |
|
With pneumatic and hydraulic devices |
from -30° to 60°C |
|
|
With electric devices |
from -20° to 50°C |
|
|
Tie rods tightening torque |
|
30 Nm |
