EDD-XZ

Valve elements with solenoid operated directional spool. Control spools directly operated by solenoids with removable coils.

In the de-energized condition, the control spool is held in the central position by return springs.

Wet pin tubes for DC coils, with push rod for mechanical override; zinc plated surface.

Coils can be rotated 180° around the tube; they can be energized by AC current throught special connection with rectifier (RAC).

Manual override (push-button, screw type) available as option.

Different plug-in connectors available: see ordering details.

Size 8

Series 00

Maximum pressure (pump side) 310 bar (4500 psi)

Maximum pressure (actuator side) 380 bar (5500 psi)

Maximum flow 80 l/min (21.1 gpm)

Port connections G 1/2 - SAE10 - Flangeable

The sandwich plate design directional valve elements D8_5 are compact direct operated solenoid valves which control the start, the stop and the direction of the oil flow. These elements basically consist of a stackable housing (1) with a control spool (2), one or two solenoids (5), and one or two return springs (4). The spring chambre are connected to the tank port. When the coil is energized, the spool (2) travels and oil is pushed to tank from one of the spring chambers: if the cross section of the orifices changes, the switching time changes as well. Three orifice sizes are available: smaller orifice results in longer switching time, even though the actual time is dependent upon pressure, flow and viscosity.When energized, the force of the solenoid (5) pushes the control spool (2) from its neutral-central position to the required position, and the required flow from P to A (with B to T), or P to B (with A to T) is achieved. Once the solenoid is de-energized, the return spring (4) pushes the spool thrust washer (3) back against the housing and the spool returns in its neutral-central position. Each coil is fastened to the solenoid tube by a ring nut (6). A pin (7) allows to push the spool (2) in emergency conditions, when the solenoid cannot be energized, like in case of voltage shortage. The secondary cartridge valves are designed for quick response and stable pressure control (8); they also incorporate a reverse flow check for anti-cavitation