The Fomblin® DS602 ready pump features a two-stage design that allows the user to operate at low temperatures, low pressure, good pumping efficiency and gas ballast. Anti-backstream valve and the vent device avoids unwanted oil contamination and venting of the vacuum system when the pump switched off. Socket allows the user to use the power cable and prevents the opening of the box to wire the motor. Ballast valve directs the air into the second stage of the pump to enhance the temperature of the module.