MULTILIFT Ultima SL Flex - Page 79

79
Ultima S / SL Flex & Pro
3/2019
Hooklift Multilift Ultima S / SL Flex & Pro
User Manual
114060421
Control valve
The control valve assembly of the hooklift is composed of electrically controlled directional
control valves, which divide oil ow for separate cylinders. Control valves are proportionally
directed and they enable controlled motions of di󰀨erent operations.
The restriction of main pressure is xed to 4350 psi (30 MPa), and in addition, for some
operations there might have been set lower restriction of pressure.
Hydraulic cylinders
Hydraulic cylinders are dual functional cylinders and they move di󰀨erent frames and
operations according to commands of the control system, either one operation at a time or
with accessory autopilot. The load control valves or pilot controlled back-pressure valves
protect the motions of cylinders.