Mannesmann Rexroth H-4WMM22J60 Manual Directional Valve

Mannesmann Rexroth H-4WMM22J60 Manual Directional Valve — RR00006334

The Mannesmann Rexroth H-4WMM22J60 Manual Directional Valve (Part Number: RR00006334) is a high-performance, direct-operated directional spool valve, controlled by a strong mechanical hand lever. NG22 size valve designed for accurate flow regulation, start and stop control in high-pressure industrial and marine fluid power systems, provides reliable mechanical control independent of electrical power supplies.

This item is being offered straight as premier industrial surplus. It boasts durable cast housing and precision spool geometry to prevent internal leakage and handle extreme duty cycles in tough maritime and manufacturing floor settings.

Model Details

• Manufacturer: Mannesmann Rexroth / Bosch Rexroth
• Series: H-4WMM Series
• Nominal Size (NG): Size 22 (NG22)
• Component Series: 6X / 7X Generation
• Manufacturer Part Number (MPN): H-4WMM22J60
• Internal Tracking / Legacy Part Number: RR00006334

Technical Specifications: H-4WMM22J60 

Key Features

1. Direct Mechanical Action: Operates entirely via a sealed hand-lever mechanism, removing vulnerability to electrical grid failures or solenoid coil burnouts.
2. High Flow Capacity: Optimized internal flow channels built for high-volume transmission up to 450 l/min without excessive pressure drops.
3. Contamination Resistant Actuation: The lever head piece is completely isolated, preventing external moisture, salt mist, and dust from entering the functional spool chambers.
4. Standardized Subplate Interfacing: Conforms strictly to ISO 4401 and DIN 24340 porting patterns, allowing direct drop-in replacement on legacy manifold blocks.

Applications

• Marine hydraulic steering and deck machinery (winches, anchor windlasses, and cargo cranes)
• Heavy industrial hydraulic power units (HPUs)
• Metal-forming presses and extrusion equipment
• Mobile hydraulic test benches and industrial gantry systems
• Emergency manual bypass circuits in automated manufacturing lines

Compatibility

• Compatible Subplate Series: Rexroth standard NG22 connection blocks (RE 45058 blocks and equivalent metric manifold arrays).
• Interchangeable With: Legacy Rexroth 4WMM22 series variants utilizing component series 7X.
• Hydraulic Power Units: Universal integration across standard open-loop and closed-loop industrial pump setups.

Frequently Asked Questions

Can this manual directional valve handle high-shock marine environments?

Yes. The H-4WMM22J60 features a rugged cast iron body and a sealed actuating head mechanism that resists saline corrosion and high ambient humidity typical of shipboard engine rooms and deck setups.

What is the maximum permissible tank pressure for this valve?

The maximum tank port (Port T) pressure rating is up to 250 bar. However, if tank line pressures exceed 160 bar, an external drain line via port Y must be integrated to prevent seal blow-by.

Is the hand lever assembly replaceable without removing the whole valve?

Yes. The head piece containing the manual actuation mechanism can be replaced or serviced directly on-site without unbolting the main valve body from the subplate manifold.

What fluid cleanliness level is mandatory for long spool life?

Rexroth specifies a fluid cleanliness level of at least ISO 4401 (c) 20/18/15, utilizing a 25 µm full-flow return or pressure line filter to prevent particulate jamming on the precision-ground spool edges.