REXROTH

Bosch Rexroth Z2S6B2-6X/ R900347502, also searchable as Z2S6B2-6X R900347502, is a pilot operated check valve in sandwich plate design, developed for reliable leakage-free blocking of hydraulic oil flow in industrial hydraulic systems. This valve belongs to the Bosch Rexroth Z2S6 series and is designed for vertical stacking assemblies where compact installation, secure load holding, and dependable hydraulic circuit protection are required.

The Z2S6B2-6X/ configuration is a size 6 / NG6 sandwich plate valve with a porting pattern according to ISO 4401-03-02-0-05 and NFPA T3.5.1 R2-2002 D03. This makes it suitable for standard CETOP 3 hydraulic manifold systems and allows easy integration between directional control valves and subplates in modular hydraulic circuits.

This model provides leakage-free blocking in channel B and allows free flow in the permitted direction while blocking reverse flow until the pilot pressure opens the valve. The B2 configuration is designed with a 3 bar cracking pressure, making it suitable for hydraulic circuits that require controlled opening behavior and stable actuator holding performance.

According to product data for Bosch Rexroth R900347502, the valve is listed with maximum operating pressure up to 350 bar and maximum flow up to 80 l/min. It features mechanical actuation, four hydraulic ports, two switching positions, NBR seals, and compatibility with common hydraulic fluids including HL, HLP, HLPD, HVLP, HVLPD, and HFC fluids.

The pilot operated check valve structure helps prevent unwanted actuator movement, load dropping, and hydraulic creep when the system is under pressure or during long standstill periods. This makes the valve especially useful in clamping circuits, lifting systems, positioning devices, hydraulic presses, machine tools, and industrial automation equipment.

The sandwich plate design reduces piping complexity and saves installation space because the valve can be installed directly in a vertical valve stack. This modular structure allows system builders to add a check function without redesigning the entire hydraulic manifold. It is suitable for both new equipment design and maintenance replacement of existing Rexroth Z2S6 valves.

In hydraulic system operation, the pilot-controlled release function provides secure unlocking of the blocked oil flow when the corresponding pilot pressure is applied. This controlled opening behavior improves system safety and helps maintain predictable actuator movement. For applications where switching shock reduction is important, Z2S series valves may also be configured with pre-opening functions depending on the selected version.

The robust Bosch Rexroth construction supports long service life in demanding industrial environments. Correct installation, suitable hydraulic fluid, proper filtration, and clean oil are essential for maintaining stable valve performance. Hydraulic contamination can increase internal wear, reduce sealing reliability, and affect pilot opening characteristics, so proper filtration should always be considered during system design and maintenance.

For replacement applications, users should confirm the complete model code Z2S6B2-6X/ and material number R900347502 before ordering. Similar Z2S6 sandwich plate check valves may have different blocked channels, cracking pressures, seal materials, or special versions. Correct matching helps avoid installation issues and ensures reliable hydraulic circuit function.

For related hydraulic valves and compatible Rexroth replacement options, visit our hydraulic valves category. For technical confirmation, price checking, and procurement support, submit your request through the contact page.

Official product reference: Bosch Rexroth official product page for R900347502.

Conclusion: Bosch Rexroth Z2S6B2-6X/ R900347502 is a reliable NG6 pilot operated check valve sandwich plate designed for leakage-free blocking, secure actuator holding, compact modular installation, and long-term hydraulic system protection in industrial applications.

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