251 / | HD | VALVES AND VALVE ACTUATION |
12 | DF | FLUID ACTUATED OR RETARDED {12} |
25 | DF | .~ Pilot or servo type motor {8} |
33 | DF | .~.~ Choked pressure type servo motor {8} |
38 | DF | .~.~.~ Pilot valve seated in motor or valve element {2} |
40 | .~.~.~.~ Tilting pilot valve |