Energy-efficient performer

Whether high flow or fine tuning: With the further developed 2-way cartridge valve LC_8X/, Bosch Rexroth is increasing the energy and cost efficiency of logic valves. The further development of the market-defining predecessor series LC_5X/, LC_6X/ and LC_7X/ opens up an even broader range of applications for mechanical and plant engineering.

With a delta-p that is 60 percent lower, the LC_8X/ once again provides a major leap in performance. The maximum operating pressure, which has been increased to 450 bar, also increases the cost-effectiveness in a wide range of path, pressure and combination functions. Further improvements relate to the criteria of productivity, stability, engineering and storage.

The new 2-way cartridge valve LC_8X/ is currently available in nominal sizes 16, 25 and 32. In addition to the standard version for 420 bar, Bosch Rexroth also offers all variants for a maximum pressure of 450 bar. The safety pressure has been increased to a maximum value of up to 490 bar. Thanks to flow-optimized geometries, the LC_8X/ has up to 60 percent less pressure loss in path functions compared to the successful 7X series. Compared to previous series, the reduction in flow resistance (delta-p) is even greater, which ensures a direct leap in efficiency and performance during retrofits.

High reliability with a long service life

The improved and revised sealing concept of the radial seal increases robustness against external pressure peaks and significantly delays or prevents the occurrence of external
leakage. A new friction-optimized piston seal that can be integrated as standard prevents internal leakage and avoids hydraulic power losses.

Cost-reducing process simplifications

With the ongoing standardization of the valve concept, Bosch Rexroth is also creating the basis for cost-reducing process simplifications for machine manufacturers - from project planning and engineering to assembly and commissioning to storage and maintenance. This also eliminates the additional costs previously required for additional options. Existing mounting covers can continue to be used due to compatibility with the previous series, which also saves resources.

For example, the multifunctional all-in-one standard variant simplifies storage and spare parts management. Optional piston shapes with a central thread, which can be either closed or equipped with nozzles, make it easier to plan pressure functions. In addition, a piston type with internal pressure feedback for check valve functions has been added to the standard range.

The newly integrated piston seal reduces the time required for engineering and assembly, as subsequent design or parts list changes are avoided. In addition, this option means that intermediate or special covers are no longer required compared to the previous series, which significantly reduces the number of variants.

The packaging makes a further contribution to the efficient use of resources: the valves are supplied in tried-and-tested, shock-resistant and environmentally protected round cups made of recycled material, which still meet Bosch Rexroth's high quality packaging requirements.

New features for assembly, maintenance and disassembly

The top cover of the two-part packaging has an integrated impact aid for error-free assembly in the intended installation hole. Time is saved during maintenance thanks to the revised service concept, which now includes a complete seal kit with all the seals required - including control oil seals for the LFA-7X/ mounting cover. Also new: The integrated disassembly groove and the extraction aid on the control spool simplify the disassembly of the entire assembly.

"The comprehensive further development of the globally established predecessor model LC_7X/ sets new standards in terms of performance, energy efficiency, simplification and stability - and all this with full compatibility with the previous series and an unchanged list price compared to previously available standard assemblies," summarizes Janis Kunkel, project manager for the LC_8X/ development project at Bosch Rexroth.