Air-oil pressure intensifier D8.770 series

hydraulic

This pneumatic-hydraulic intensifier can be used as a pressure generator where live cables are not possible or suitable, e.g. in hazardous surroundings. Only single-acting cylinders can be connected. The cylinder volume should utilise the stroke volume of the intensifier only up to 60 - 70% so as to have some reserve left. When designing fixtures, some features of the air intensifier should be taken into account: 1. Extend cylinder Intensifiers are liable to release the effective oil volume very quickly within 1 second. The oil speed depends only on the flow rate of the compressed air. This may cause malfunctions in clamping elements where the maximum flow rate is limited (swing clamps, work supports). In those cases a flow control valve must be provided on the oil side. 2. Pressure build-up After extending the cylinders, pressure build-up is relatively slow, according to the nominal bore of the pneumatic piping and air pressure. At 6 bar the sextuple working volume must be fed, which takes approx. 3 seconds. 3. Unclamping For this purpose, the air volume accumulated must first be reduced to a residual pressure below 0.2 bar, before the connected hydraulic cylinders retract. The high-speed vent valve available as an accessory allows for a pressure release time of approx. 2 seconds at an initial pressure of 6 bar.