... 1.cast metal material; 2. filter air; 3.separate the water from the air. Air Water Separator For Biogas Vacum Pumps(XP-60A/80A) 1 ... season and cold areas, difficult when the vacuum pump rotary pump should be checked whether the water ice, and used antifreeze lubricant, ... can not hold too full, non-pump water, foreign objects, water, must be discharged in the water pump and oil change, or Which causes ...