Monoblock Hydraulic Directional Control Valve, 3 Spool, 31 GPM. SKU: P1201-3A1. This monoblock valve is a hydraulic directional control valve. These manual operated valves are used to start and stop fluid flow into hydraulic cylinders or hydraulic motors. Common Uses: Used to operate hydraulic cylinders (Double-Acting or Single-Acting). Install rear remotes on a tractor.. Benefits: 3 spool manual operated valve with compact design allows for installations in tight areas. All spools are standard double acting with spring return to neutral position which are ideal for double acting cylinders.. Used for open center systems (Pump to Tank Flow). Anti-drop load checks on each spool.. 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.. Vertical or horizontal handle mount.. Adjustable Relief Valve Range: 1500 to 3625 PSI.. Preset Pressure Relief: 2,610 PSI. Features: Max Operating Pressure: P = 3625 PSI, T = 725 PSI, A & B = 4350 PSI.. Flow Rating: 31 GPM (117.35 l/min). A & B Work Ports: #16 SAE O-Ring (1 5 16 - 12) Thread. Inlet Port: #16 SAE O-Ring (1 5 16 - 12). Thread Outlet Port: #16 SAE O-Ring (1 5 16 - 12). Thread N Port: #16 SAE O-Ring (1 5 16 - 12) Thread. 3 - 5/16 Mounting Holes..