Actively regulated landing gears are supplied via a hydraulic pump, which is usually a radial piston pump. This is controlled on the suction side (suction throttle).
ETO has developed 2/2 proportional valves for this which are able to regulate large volume flows precisely.
The ETO valves ensure that regulated pumps provide the appropriate volume flow in every driving situation for the active chassis. This contributes significantly to a reduction in fuel consumption and thus also emissions.