4WRTE16V125L-4X/6EG24ETK31/A1M

The 4WRTE16V125L-4X/6EG24ETK31/A1M valve is manufactured by Bosch Rexroth within the 4WRTE Directional Control Valves series. It meters hydraulic flow and directs pressure in automated power units. The size NG16 designation fixes port geometry and balances capacity with manifold dimensions. An ISO 4401-07-07-0-05 mounting pattern lets the valve bolt directly to standard sub-plates without adapters. A nominal supply of 24 VDC energizes the integrated electronics, while tolerance up to 35 VDC protects the circuitry against transient overvoltage. Maximum current draw of 1.6 A helps designers select a suitable amplifier, and the 72 VA power ceiling sets the enclosure cooling requirement. Electrical termination is through a DIN EN 175201-804 K31 connector so harnesses can be standardized across machinery. The ±10 V command and feedback interface permits closed-loop proportional control from common analog motion cards. An IP65 protection class seals the housing against dust and low-pressure water jets for reliable operation in industrial environments.

The valve withstands 350 bar on pressure ports P, A, and B, enabling direct placement in main supply lines that drive cylinders or motors without separate relief blocks. Allowing up to 10 bar on the tank port keeps back-pressure low enough for consistent metering yet high enough for safe fluid return through core filters. A recommended flow capacity of 460 l/min supports large actuator strokes at high speed, so system designers can avoid installing parallel valves. Because pilot supply and return are routed internally, tagged with the ET designation, installation involves only the main interface and omits extra piping that can leak or vibrate. The pilot stage passes 14 l/min when moving the spool through its full range, a value that assures quick response while limiting pump loading. Pilot pressure is limited to 315 bar, protecting small-control orifices from fatigue. Finally, a mass of 11.2 kg influences bracket design and dictates that a single technician can still handle the assembly safely.