Full definition
Safety valve limiting maximum system pressure by opening a return path to the reservoir when the set pressure is reached. Types: direct-acting (up to 350 bar, fast response) and pilot-operated (low hysteresis, high flow). Rated flow: 5-500 l/min. Pressure adjustment: manual or screw-type. Standard ISO 6403. Brands: Bosch Rexroth (DBDS/DBET), Parker (RD/RE), Sun Hydraulics, Hydraforce.