When a press or injection machine built around Rexroth 4WE-pattern valves needs spares, the OEM route is often a multi-month wait. The HYDRAUT 4WE/4WEH series exists to close that gap with valves that mount on the same subplates and use the same spool symbols.

What does wet-armature construction actually buy you?

In a dry-pin coil the push-pin seal between solenoid and pressure area is the classic leak point. HYDRAUT molds the coil around a wet armature that sits directly in the hydraulic fluid, eliminating that seal entirely, and the molded coil body keeps moisture and dirt out of the winding. Both AC 110/220 V 50 Hz and DC 12/24 V coils are stocked, with or without the DIN connector form, and each valve ships with its bolt kit. Compared with the direct-operated 4WE in Cetop 3 and 5, the piloted 4WEH versions in Cetop 7 and 8 move up to 300 L/min at pressures to 315 bar on P, A and B ports.

How close is the interchange, really?

The mounting pattern, spool symbols and electrical connections follow the established Cetop interface, so a Vickers DG4V-3 or DG4V-5 and the Denison 4D01 and 4D02 families swap the same way. Fluid tolerance covers mineral oil and phosphate ester from -20 to 70 deg C at viscosities of 2.8 to 100 mm2/s. Against used or refurbished original valves, the HYDRAUT option arrives new with current-production coils, and against other interchangeable brands it holds the full four-size span from Cetop 3 to Cetop 8 in one catalog rather than splitting across two series.