mp08The MP08-34X is a 3-way, manual pull to shift, spring return, directional hydraulic cartridge valve. Operation. In its neutral position the valve blocks flow between ports 2 and 3. In the actuatedView and Download Merlin Gerin Masterpact MP manual on. Masterpact MP circuit breakers pdf manual download. Also for: Masterpact mp 08h1, Masterpact mp 12h1, Masterpact mp