Full definition
Aluminum or steel block with CNC-machined internal passages where hydraulic valves are mounted directly (D03, D05, D08 per ISO 4401). Eliminates external plumbing, reduces leak points, compacts the circuit, simplifies maintenance. Material: 6061-T6 aluminum (up to 250 bar), steel (up to 350 bar). Machining: EDM or 5-axis milling. Verification: leak test at 1.5× Pmax. Brands: Bosch Rexroth, Sun Hydraulics (CETOP), Parker, HUSCO, Wandfluh.