1) DH220LC-3, DH280LC-3, DH330LC-3, DH200W-3 excavators, using Toshiba (TOSHI-BA) DX22 (28) type main control valve, with boom priority function.
2) The large-character DH0L.C-m crawler excavator uses the UDX36 main control valve produced by Toshiba Corporation. When the loading mode and lifting mode are selected, Pur = 2.9MPa; when the ground preparation mode is selected, Pa = 0MPa.
3) The structure of the central valve group of UDX36 type main control valve. Boom priority valves, swing priority valves, main relief valves, linear travel control valves and other auxiliary control valves are all installed on the central valve block.
