... performance 3,Bitzer compressor 4,R717/R22/R404A ApplicationVacuum freeze drying machine is suitable for fruit, vegetable, aquatic, meat, instant foodstuff,condiments ... following parts1. pretreatment system2. freezing and drying tank3. heating system4. vacuum system5. refrigeration system6. material conveyor7. control systempretreatment system→frozen(controled by ...