Directional Control Spool Valves/Monoblock

Hydraulic Directional Control Valves 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 150 l/min Spool stroke 10 mm,L12+/-10/6 Actuating force < 300 N Modification/Spools from 1-6/without 5

Description

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.

Construction

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.

Mounting

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

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