SOGEVAC®

SV40 B - SV65 B - SV100 B - SV120 B Single-stage, oil-sealed rotary vane pump

The SOGEVAC® pumps are single-stage oil-sealed rotary vane vacuum pumps. The rotor, having three slots in which the vanes are sliding, is eccentrically installed in a pump cylinder (stator). The vanes separate the interior space into 3 chambers. The volume of these chambers varies with the rotation of the rotor. The gas sucked into the inlet chamber is compressed and then pushed out at the exhaust valve. The oil injected in the inlet chamber guarantees the air-tightness, the lubrication and cooling of the pump. It is dragged off by the compressed gases and roughly separated by gravity when entering in the oil sump. A fine separation is then operated in the exhaust filter, which retains > 99,9 % of the oil aerosols. An internal transfer pushes the collected oil back into the vacuum generator, the transfer is operated by a float valve to avoid atmospheric air coming from the oil casing to the inlet of the pump when no oil is present in the recovery system. The oil circulation functions by differential pressures. Some pumps are equipped with an oil filter. Pumps are available with or without gasballast, with corresponding catalog numbers. At pump switch off, an anti suck-back valve (ASBV) closes the pump inlet and avoids pump oil be sucked into the chamber. For this, the ASBV must be kept clean and in good condition.