Walvoil DLS control valves

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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.

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Technical Specifications

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