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Rotary lobe blowers used to increase the capacity of the primary vacuum pumps when operating at their minimum suction pressure (as a booster).The RBS/AV blowers must be used in series with a primary vacuum system ( VP ) and for pressures lower than 50 mbar absolute.The main characteristics of these blowers are as follows:
-two conjugate rotorswhich rotate inside a special design casing with tight clearances in all position, assuring gas sealing without contact between parts-the labyrinth sealsavoid the atomized oil to enter into the compression chamber.-the sealing between compression chamber and environment is ensured by O-rings seals, set between ground surfaces.-The shaft end sealing is made by two seal rings in VITON with opposite lips lubricated by means of a fitted on oiler.The oil ring housing can be cooled by water circulation.-the shaft is protectedby an hardened replaceable sleeve.- Suction of gases and vapours;- No sliding parts, therefore no wear;- Safe operation and minimum maintenance;
Robuschi can supply primary vacuum systems consisting of liquid vacuum pumps with deliveries up to 4, 200 m/h.