Hydraulic Valve Body InspectionRexroth Bosch MP18 Valve Section, 3 Way 2 Position, 12V DC Proportional Coil, 30 GPM Upper and Lower Spools, with Stroke Limiter. Rexroth Bosch MP18 Hydraulic Valve section. Rexroth Bosch MP18 Valve Section, 3 Way 2 Position, 12V DC Proportional Coil, 30 GPM Upper Spool, Adjustable Flow Control, and Stroke Limiter.