Valve assembly system in hydraulics whereby a mounting area for valves — to which the pipe is screwed from behind — is attached to the drive unit, while the valves are mounted from the front so they are easy to remove (Figure M 29). The advantage with this approach is the "uncluttered" design with its easy access. The disadvantage is how the pressure and delivery flow pulsation in the pressure fluid cause higher noise emissions at the wall, not to mention the large amount of space taken up, the extensive pipework and the many areas where potential leaks may occur in the pipes. These days the preferred option is the block design.
Figure M 29: Mounting wall