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All spools are double acting with spring return to neutral position, A spool is designed to control double acting cylinders A and B ports are closed to Tank in neutral position Used for open center systems (Pump to Tank Flow) Precision ground and hard chrome-plated spools assure a long life High-tensile strength cast iron monoblock construction SAE O-Ring ports ensure solid seal and prevent blockages Capable of closed center or Power Beyond (conversion plug required) Adjustable Relief Valve Range: 1500 to 3625 PSI Manual Override Features: 12 Volt DC Solenoids DIN 43650 3 Prong Connectors Max Operating Pressure: P = 3625 PSI, T = 725 PSI, A & B = 4350 PSI Flow Rating: 13 GPM (50 l/min) A & B Work Ports: #8 SAE O-Ring (3/4”-16) Thread Inlet Port: #10 SAE O-Ring (7/8”-14) Thread Outlet Port: #10 SAE O-Ring (7/8”-14) Thread Solenoid Specifications: Nominal Voltage Tolerance +/- 10% Power Rating: 37 Watts Amps: 3.08 100% Duty Cycle