Bosch Rexroth

Bosch Rexroth hydraulic components are precision-engineered flow control and pressure regulation devices designed for industrial automation and mobile machinery applications. These components include servo directional valves like the 4WSE3E series with nominal sizes from 16 to 32, logic cartridge valves such as the LC125 and LC160 series for manifold mounting, and specialized control elements for hydraulic circuits operating at pressures up to 350 bar. Primary applications span manufacturing automation, construction equipment, material handling systems, and process industries where precise hydraulic control is critical for operational efficiency and safety.

Selection of Bosch Rexroth hydraulic valves depends on nominal flow rate, operating pressure range, and valve function type. The LC125 series cartridge valves handle flows up to 125 L/min with maximum working pressure of 350 bar, while LC160 series components accommodate higher flow rates up to 160 L/min. Servo directional valves like the 4WSE3E series feature proportional control with electrical feedback and operate on 24V DC supply voltage. Critical selection parameters include connection thread size, control signal type, response time requirements, and environmental conditions such as operating temperature range from -30°C to +80°C for standard applications.

Bosch Rexroth hydraulic components comply with ISO 4401 for mounting surfaces of directional control valves, ISO 7368 for logic elements and cartridge valves, and ISO 11926 for hydraulic filter elements where applicable. The cartridge valve systems conform to CETOP standards for interchangeable mounting and ISO 228 threading specifications. Electrical components meet IEC 60204-1 for electrical safety requirements and EMC directive 2014/30/EU for electromagnetic compatibility. Components designed for mobile applications additionally comply with ISO 14982 for electromagnetic compatibility in vehicles and SAE J1939 CAN bus communication protocols where integrated control systems are utilized.

The LC125 series logic cartridge valves accommodate maximum flow rates of 125 L/min with cavity size of 25.4mm diameter, while LC160 series valves handle up to 160 L/min through larger 31.8mm diameter cavities. Both series operate at identical maximum working pressure of 350 bar, but the LC160 series provides 28% higher flow capacity for applications requiring increased hydraulic power. The LC125 series offers more compact manifold integration with reduced weight of approximately 0.8 kg per valve compared to 1.2 kg for LC160 components. Function variations include pressure control with suffix codes A, B, and E designating different spring settings and flow directions for both series.

Bosch Rexroth logic cartridge valves require precision-machined manifold cavities conforming to ISO 7368 specifications with surface roughness Ra 0.8 μm maximum and cavity depth tolerance of ±0.05mm. Servo directional valves mount directly to standard ISO 4401 subplates with NG6 to NG25 connection patterns depending on valve size. Electrical connections utilize standard M12 or M23 circular connectors with IP67 protection rating when properly mated. System compatibility requires hydraulic fluid viscosity between 10 to 500 mm²/s at operating temperature, with mineral oil HLP to DIN 51524 part 2 or synthetic alternatives meeting identical specifications for optimal seal compatibility and service life.

Bosch Rexroth hydraulic valves operate safely at maximum working pressure of 350 bar with proof pressure testing at 525 bar and burst pressure exceeding 1400 bar for cartridge valve bodies. Standard operating temperature range spans -30°C to +80°C with brief peaks to +100°C permissible during startup conditions. Electrical components maintain IP65 protection rating as standard with IP67 available for harsh environment applications when specified connector sealing is utilized. Servo valves feature integrated position feedback with safety monitoring circuits that detect coil failures and provide fail-safe valve positioning to predetermined states, ensuring system safety during electrical supply interruption or component malfunction.

Bosch Rexroth hydraulic valves achieve service life of 10 million switching cycles for logic cartridge valves and 5 million cycles for servo directional valves under normal operating conditions with proper fluid cleanliness maintained at ISO 4406 18/16/13 or better. Preventive maintenance requires hydraulic fluid analysis every 2000 operating hours with filter element replacement according to contamination indicators or pressure differential exceeding 3.5 bar across filter housing. Visual inspection of electrical connections and servo valve feedback signals should occur every 6 months with functional testing of emergency stop sequences and fail-safe positioning. Critical applications warrant annual disassembly inspection of high-cycle components with seal replacement every 8000 to 12000 operating hours depending on system duty cycle and environmental conditions.