
SED-2XDG-B — Vacuum Freeze Dryer
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SED-2XDG-B is a large-scale pharmaceutical vacuum freeze dryer with 8+1 SUS304 shelves (500 × 500 mm each, 2 m² total), built-in hydraulic stoppering system, and SIEMENS PLC+DELL PC control. Shelf temperature range: -55
Funktionsweise
Product loaded on SUS304 shelves is frozen by silicon-oil (Dow Corning USA) circulation cooled by a 2-stage cascade refrigeration system (DANFOSS MTZ-050 + NTZ-068, France). The condenser (min ≤-75 °C) captures sublimated water vapor from the rectangular SUS304 drying chamber under vacuum (ultimate ≤1 Pa) maintained by a Japan ULVAC rotary-vane vacuum pump (18 m³/h). Shelf heating uses PID-controlled electric heating (3 kW) for precise temperature ramping. A Germany FV butterfly valve isolates the drying chamber from the condenser. Built-in REXROTH (Germany) hydraulic system enables in-situ stoppering of vials under vacuum. SIEMENS PLC + DELL PC with WINCC software supports automatic and full manual emergency operation, recipe management, and remote diagnostics.
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SUS304 surfaces polished to Ra ≤0.4 μm (shelves) and Ra ≤0.8 μm (condenser). Chamber, shelves, and hoses tested through multiple procedures to ensure no leakage. Condenser interior cleaned by special method to ensure no dirt. Hot refrigerant defrost for condenser.
