Abstract: A control valve assembly for indirect pneumatic control and method for controlling a working fluid pressure, which enable precise, sensitive and speed-variable controlling. The assembly includes two valve units, a working fluid inlet, and a control fluid inlet. A working fluid channel connects the working fluid inlet through the two valve units to an outlet. A valve piston arranged within a valve cylinder of the valve units is movable between open and closed positions. A spring element biases the valve piston toward the closed position, and a control pressure chamber applies a control pressure counteracting the spring element's bias. When a control pressure is applied in the first chamber, the first valve piston is moved to the open position.

Abstract: The invention relates to a fluid-operated hoist and a method for operating a fluid-operated hoist. In order to provide a fluid-operated hoist and a method for operating a fluid-operated hoist, wherein the hoist is particularly convenient to produce and install and can be permanently and reliably operated without frequent maintenance, it is provided that the hoist comprises a fluid supply line supplying an operating fluid to the hoist for operating the hoist, a generator connected to the fluid supply line for generating electricity by means of the operating fluid, and at least one electrical consumer on the hoist which is operated by means of the electricity generated by the generator.

Abstract: A control valve assembly for indirect pneumatic control and method for controlling a working fluid pressure, which enable precise, sensitive and speed-variable controlling. The assembly includes two valve units, a working fluid inlet, and a control fluid inlet. A working fluid channel connects the working fluid inlet through the two valve units to an outlet. A valve piston arranged within a valve cylinder of the valve units is movable between open and closed positions. A spring element biases the valve piston toward the closed position, and a control pressure chamber applies a control pressure counteracting the spring element's bias. When a control pressure is applied in the first chamber, the first valve piston is moved to the open position.