RKW series hydraulic drum brakes are normally open, hydraulically actuated brakes that are installed horizontally (horizontally with respect to the brake wheel axis) and are mainly used for decelerating brakes on slewing mechanisms such as gantry cranes and tower cranes, etc. The RKW series brakes are controlled by foot pumps, and can be used for random braking. RYK series brakes are normally open, hydraulically actuated brakes, controlled by foot pumps.It is mainly used for the deceleration braking of all kinds of general-purpose bridge and gantry cranes for the trolley running mechanism, and can also be used for the deceleration braking of non-lifting winch driving device, which can realise the smooth braking of the mechanism.