Main stage has proportional spool in cast housing
Pilot stage has sleeve/spool (4WRPEH)
Nominal Flow rated at 10 bar ?p for pilot operated Servo Solenoid valves
E, W, V, Q4-spools like proportional
V-spool at spring-center has 1 to 6% offset P-to-B
Failsafe of pilot (C3) allows main spool to spring center
