3 spool hydraulic directional control valve 11gpm, monoblock, cast iron, BSP ports Max operating pressure P = 3600psi (250 bar); T = 150psi (10 bar); A , B = 4300psi (300 bar) Tandem center, all spools are double acting with spring return in neutral position A, B ports 3/8" BSP; P, T, N ports 1/2" BSPP (British Standard Parallel Pipe, not NPT) Adjustable relief valve: from 1500 to 3625 PSI specify if you need special spools, adapters, power beyond etc