... use in the indusries such as vacuum metallurgy, vacuum welding, vacuum casting, vacuum drying, chemical and pharmaceutical, electric vacuum devices. Long continuous work is ... high oxygen, toxic, explosive, corrosive, chemical reaction responding to pump oil and dust contained gases or used as delivery ... valveDDC-JQ25DDC-JQ40DDC-JQ65DDC-JQ80Weight kg59129168194343 2X Series Rotary Vane Vacuum Pump