KatT2-20190716

Märkische Stanz-Partner AUTONOME GASDRUCKFEDERN / STAND ALONE GAS SPRINGS [NC .12 ] Information Information Märkische Stanz-Partner [operating instructions ] NitroCyl Gas Springs Assembly, Maintenance, Safety The careful selection of gas springs and corresponding components during the design phase reduces cost and eliminates possible problems, and thereby ensures a reliable performance of dies and presses during production. Safety: Gas springs are high-charged pressure devices with a max. pressure of 150 bar (in some cases 180 bar max. !!). Repair and maintenance must only take place after the unit(s) have been unloaded and unpressured! This happens through opening of the filling- / bleeding - valve of any given system. Any repair or maintenance work should only be handled by skilled technicians of MSP-N, or people at the customer‘s plant that have been specifically trained for these tasks by MSP-N - technicians. If not handled 100% accurately, there are dangerous threats for the health (possibly life !!!) of the people involved, as well as potentially for dies and presses. Assembly: Gas springs may only be charged with Nitrogen. The pressure ranges between 20 and 150 bar (in some cases 180 bar max. !!) at room temperature (20 ºC). The maximum nominal pressure must not be exceeded, since safety and operating lifetime will suffer and cannot longer be guaranteed. Additionally, the working temperature should not exceed 80 ºC, since higher temperatures have a negative impact on the lifetime of the seals. NitroCyl gas springs should be mounted using bottom threads, flanges or clamps. If put in cavities, the corresponding diameter should be only 1 mm larger than the spring OD to avoid tilting. If a gas spring with a smaller diameter needs to be put into a cavity with a larger OD and is not mounted, a compensating sleeve may be used. The depth of the cavity should - if possible - be at least 85% of the gas spring body-length. The gas spring rod should be protected from dirt and mechanical damage. A „flooding“ of the gas spring with oils or similar fluids must be avoided. If needed, drain-holes have to be provided. It has to be kept in mind, that the rods must not return into 0-Position at full speed, which can destroy internal components. Gas springs have to be mounted in dies and presses parallel to the direction of the force - application. At the same time the flange-flats and the attached surfaces - which should have a sufficient hardness - need to be at an angle of 90º to the force-application. It is prohibited to use the thread in the rod to fix the gas spring, f. e. to connect the spring to a stripper plate. Since this mounting could result in side load forces, the rod itself and seals could be damaged, thereby reducing lifetime. The rod-thread is meant for maintenance - purposes only. A 10% stroke-buffer should be considered (min. 3 mm). The maximum rod-speed, depending on the gas-spring family, of 0,5 / 1,6 or 2,0 m/sec. needs to be respected. [NC]