b'RTCH SeriesOperationThe working cylinder is activated by the movement of the press, moving the hydraulic volume from the drive unit to the working cam through the hoses.As soon as the hydraulic pressure exceeds the counterforce exerted by the gas spring, the cam starts its working stroke. At the end of the cam working stroke, the system pressure increases to equal the pressure of the nitrogen gas pressure accumulator. The gas spring has an extra 15mm overstroke capacity to ensure an identical pressure increase in each cycle. The excess volume of oil produced by the overstroke is absorbed by the pressure accumulator.When the press stops acting on the working gas spring of the drive unit, the cam returns to its initial position thanks to the recoil of the gas spring.Safety FunctionIn the event that the cam working stroke is partially or completely hindered, the accumulator can completely absorb the displaced oil thereby avoiding any risk of breakage or explosion.32017 10 READY Hydraulic Cams Brochure w 3 Updated pages.indd 3 10/9/17 10:09 PM'