4WP6H6X/N

The 4WP6H6X/N valve belongs to the WP Pneumatic Spool Valves series from Bosch Rexroth and directs pressurized oil to actuators in hydraulic automation systems where sliding spool accuracy is required. The spool is shifted by pneumatic actuation, allowing electrically safe operation in hazardous zones. Service ports a, b, and p withstand operating pressure up to 315 bar, so the unit tolerates common power pack ratings. Maximum flow of 60 l/min supports cylinders and motors in medium-capacity machinery. Pilot control must supply at least 4 bar and not exceed 10 bar; this pressure range ensures the actuator piston moves fully without overstressing seals. Each command moves 4.24 cm³ of pilot medium, defining the air consumption per cycle. A tank port rated for 160 bar lets back pressure develop without risking leakage. When air is unavailable, a manual override lets maintenance staff shift the spool directly for troubleshooting.

The valve switches quickly, achieving up to 7,200 cycles per hour, so it can follow rapid machine sequences without sticking. Installation is unrestricted because the design functions in any position, simplifying layout inside compact manifolds. Mounting mates with the DIN 24340 Form A porting pattern, letting the block bolt to standardized subplates. Internal seals are molded from NBR, providing compatibility with mineral oil hydraulics while containing high pressure. System oil must meet ISO 4406 cleanliness class 20/18/15 to prevent silt from abrading the spool lands and to maintain switching accuracy. These construction details, combined with pneumatic pilot operation, allow the 4WP6H6X/N to integrate into repetitive press lines, test rigs, and other automated stations that demand consistent high-frequency flow redirection.