device for the protection of vacuum valves used in the pressofusione of zama, aluminum, brass or similar alloys

摘要

the invention relates to a device for the protection of vacuum valves for the pressofusione of zama, aluminum, brass or similar alloys.in which each vacuum valve has an entrance connected to the mold for pressofusione and ride out to connect to a suction apparatus through a composite body having a sectionand accumulation (14) of particles and liquid and solid impurities, and a filter section (15) of the aria.figura 2.