S 290

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Technical parameters

One piece casting of high tensile cast iron
Parallel circuit with open or closed center operation
Built-in relief valve and load checks
Cylinder port relief and/or anti-cavitation checks optional
High pressure carry-over
Ambient temperature -40C...+60C
Hydraulic liquid - mineral oil based hydraulic oil
Viscosity 12 ...800 mm2/s
Fluid temperature -15C...+80C
Filtration 10 to NAS 1638
Max operating pressure, P=320; T=5 bar A , B = 320 bar
Leakage(A,B-T) 30cm3/min at 120bar
Nominal flow 110 l/min
Spool stroke 10 mm,L12+/-10/6
Actuating force < 300 N
Modification/Spools from 1-6/without 5


The valve monoblock is available in 1 up to 6 spool models.The valve housing is casted in chrome alloy cast iron.As standard the valve has two built-in load check valves in the inlet section, one check for <A<port and one for <B<port circuit but can upon request be delivered with check valve in each section.The special design of the housing makes it possible to operate the load very smooth and accurate.


The valves have parallel circuits, thereby allowing operation of more several combinations to meet customer's requirements.A direct operate main relief differential valve is standard on all valves. The spools are made from hardened steel and chrome plated to secure maximum protection against corrosion and wear. It is used with air-cylinders for lorrytruck cranes.


The monoblock valve can upon request be delivered with built-in port relief valves and/or anti-cavitation check valves.

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