Rexroth R900932112 Hydraulic Directional Valve

 

 

Product Overview

The Bosch Rexroth R900932112 is a hydraulic directional control valve used to start, stop, and change the direction of oil flow in hydraulic systems.

It is typically installed in NG6 / CETOP 3 / ISO 4401-03 valve manifolds, widely used in industrial hydraulic machinery.

Key Specifications

• Brand: Bosch Rexroth
• Part Number: R900932112
• Type: Hydraulic directional control valve
• Mounting Standard: NG6 / CETOP 3 / ISO 4401-03
• Valve Function: Typically 4/2 or 4/3 spool type (configuration dependent)
• Actuation: Solenoid operated (electromagnetic coil control)
• Operating Pressure: up to ~315 bar (system dependent)
• Flow Capacity: medium flow industrial hydraulic circuits
• Fluid Compatibility: mineral oil (HLP, HFC depending seal version)
• Installation: sandwich / subplate mounting

Note: Exact spool configuration (4/2 or 4/3, center position type) depends on system version tied to full Rexroth ordering code.

Working Principle

The valve controls hydraulic flow paths:

• Solenoid ON (coil energized) → spool shifts → oil flow direction changes
• Solenoid OFF → spring returns spool → default flow state restored

This allows:

• Cylinder extend / retract control
• Motor direction switching
• Load holding or unloading functions

Advantages & Features

• Fast and reliable direction switching control
• Compact NG6 standardized mounting (easy replacement)
• Suitable for high-pressure industrial systems
• Stable operation in continuous duty cycles
• Wide compatibility with Rexroth hydraulic manifolds
• Durable industrial-grade spool design

Applications

• Injection molding machines
• Hydraulic presses
• Machine tools
• Industrial automation systems
• Construction machinery
• Steel and heavy industry equipment
• Hydraulic cylinder control systems

Precautions

• Must match NG6 / CETOP 3 mounting standard exactly
• Coil voltage must match system (e.g., 24V DC / 110V AC depending version)
• Incorrect wiring may cause valve not to switch or burn coil
• Hydraulic oil must be clean (contamination can cause spool sticking)
• Do not operate outside rated pressure range
• Ensure correct spool type for system function (center condition is critical)