Filling valves The CFPs are filling valves, piloted, expressly designed for hydraulic presses, to allow easy filling and emptying of the Cylinder Chamber of the press during the quick and climbing movements. They are mounted in Sandwich, to be installed directly between the suction flange (connected to the tank) and the cylinder. A version with a pre-opening device on the pilot attack is available. Allows the decompression of the circuit before the cylinder is raised.