The new pilot-operated LFA_DB_-7X/_E 2/2 directional pressure relief cartridge valves by Rexroth provide high flow and pressure at significantly lower costs than previous solutions. The safety valves type-examination tested under the Pressure Equipment Directive 97/23/EC simplify hydraulic circuits and reduce inspection effort during operation in addition to material and installation costs.
The new cartridge valves by Rexroth eliminate the need for previously necessary components in stationary hydraulic systems and contribute to reducing manufacturing and operating costs, as well as reducing the overall installation space needed in the block. With a relief pressure of 190 bar and a delivery volume of 3,500l/min, this valve replaces up to 15 cartridge units. At 350 bar and 5,000l/min, the ratio is 1:9. A size 63 cartridge valve can replace more than 10 existing single valves. This substantially reduces material costs and installation time. Standard safety is certified through a type examination by TÜV Süd.
The porting pattern for the safety valves is in accordance with ISO 7368 (Form B) and also allows retrofitting in installed systems. The pressure limiter is integrated into the sealed control cover. The relief pressure is configured to the desired maximum value and sealed at the factory. In addition to a fixed maximum setting, Rexroth also offers a version that can be adjusted to lower pressure values.
