The Rexroth R978056996 and R978057441 are high-performance screw-in cartridge hydraulic pressure relief valves engineered for robust system protection. Designed by Bosch Rexroth, these valves effectively limit pressure in hydraulic circuits to prevent overpressure damage and ensure optimal machinery performance. Each unit features a durable hexagonal body for easy installation, a threaded adjustment stud on top for precise pressure calibration, and a threaded cartridge mounting section equipped with premium O-ring seals. This ensures a secure, leak-free fit within standard manifold cavities, making them highly reliable for demanding industrial and mobile hydraulic applications.