Industrial Hydraulic - Directional Control Valves

Manual Operated Directional Valves DCV4-3

General Description

The primary function of these four-way directional control valves, in a hydraulic circuit, is to direct flow . This in turn would determine the direction of movement of a fluid cylinder or the direction of rotation of a fluid motor port connections are made by mounting the valves on a sub plate or manifold having mounting dimensions which conform to (ISO-4401-03)

Surges of oil in a common tank line serving these and other valves can be of suf ficient magnitude to cause inadvertent shifting of these valves. This is particularly critical in the no-spring detented type valves. Separate tank lines or a vented manifold with a continuous downward path to tank is necessary . Any sliding spool valve, if held shifted under pressure for long periods of time, may stick and not spring return due to fluid residue formation and therefore, should be cycled periodically to prevent this from happening.