YAMATO DC401 Benchtop Freeze Dryer with Manifold
| Brand | YAMATO |
|---|---|
| Model | DC401 |
| Type | Manifold-Style Laboratory Freeze Dryer |
| Origin | Japan |
| Freeze-Drying Area | 0.12 m² |
| Ultimate Vacuum | 6.7 × 10⁻² Pa |
| Condenser Temperature | −45 °C |
| Ice Capacity (24 h) | 0.6 L |
| Condenser Dimensions | Ø153 × H235 mm |
| External Dimensions (L×W×H) | 300 × 404 × 696 mm |
| Net Weight | ~32 kg |
| Power Supply | AC 100 V, 50/60 Hz, 6 A (20 A circuit breaker) |
| Refrigerant | R404A (300 g ±5 g) |
| Cooling System | Air-Cooled Compressor (300 W) |
| Vacuum Gauge | Pirani-type |
| Defrost Method | Hot-Gas Bypass |
| Safety Features | Anti-backflow check valve, overload current protection, earth-leakage circuit breaker, compressor overheat relay |
| Vacuum Pump Compatibility | Requires external pump with ≥50 L/min pumping speed (e.g., YAMATO PD53, ultimate pressure 6.7 × 10⁻² Pa) |
Overview
The YAMATO DC401 is a compact, air-cooled benchtop freeze dryer engineered for routine lyophilization of small-batch biological, pharmaceutical, and chemical samples in academic, quality control, and R&D laboratories. It operates on the fundamental principles of sublimation under deep vacuum: frozen water is removed directly from the solid to vapor phase without passing through liquid, preserving structural integrity, activity, and stability of heat-sensitive compounds. The system integrates a high-efficiency R404A refrigeration cycle delivering a stable condenser temperature of −45 °C, enabling reliable capture of up to 0.6 L of ice over 24 hours across its 0.12 m² drying area. Its manifold configuration supports simultaneous drying of up to four samples in individual flasks or vials, each sealed with stopcocks for independent pressure control—ideal for method development, stability testing, and small-scale formulation work.
Key Features
- Integrated Pirani vacuum gauge for real-time, high-resolution pressure monitoring down to 6.7 × 10⁻² Pa—critical for optimizing primary drying endpoints and ensuring process repeatability.
- Automatic anti-backflow safety mechanism: Upon power loss or shutdown, a check valve prevents diffusion pump oil migration into the vacuum chamber, protecting sample integrity and minimizing maintenance.
- Hot-gas bypass defrost system enables rapid, residue-free removal of condensed ice from the cold trap without disassembly—reducing downtime between cycles and eliminating manual scraping.
- Air-cooled, low-noise 300 W hermetic compressor with precise R404A charge (300 g ±5 g) ensures consistent thermal performance and long-term reliability without requiring chilled water or external cooling infrastructure.
- Dedicated service sockets (vacuum pump: max 6 A; heating: max 2 A) support seamless integration with compatible YAMATO vacuum pumps (e.g., PD53) and optional shelf-heating modules (sold separately).
- Comprehensive electrical protection suite includes earth-leakage circuit breaker, compressor overload relay, and reverse-flow prevention valve—designed to meet IEC 61010-1 requirements for laboratory equipment safety.
Sample Compatibility & Compliance
The DC401 accommodates standard 10–50 mL glass vials, serum bottles, and round-bottom flasks mounted on its 4-port manifold. It is routinely deployed for lyophilizing aqueous solutions of proteins, enzymes, vaccines, antibiotics, and diagnostic reagents where residual moisture content must remain below 1–3 wt% per USP and Ph. Eur. 2.9.36. While the base unit does not include a pre-freezing capability, it is fully compatible with external ultra-low-temperature freezers (−80 °C) or dedicated pre-freeze modules to ensure complete solidification prior to primary drying. The system’s vacuum stability and temperature uniformity support validation protocols aligned with ISO 20988:2018 (lyophilization process validation) and facilitate audit-ready documentation when paired with compliant data loggers.
Software & Data Management
The DC401 operates via intuitive front-panel controls with LED indicators for vacuum status, condenser temperature, and system faults. Though it lacks built-in digital recording, its analog outputs and discrete relay signals are compatible with third-party data acquisition systems (e.g., LabVIEW, DeltaV, or custom SCADA) for time-stamped logging of vacuum pressure, condenser temp, and cycle phase transitions. When used with YAMATO’s optional PD53 vacuum pump (equipped with integrated pressure feedback), users can establish closed-loop pressure ramping profiles. All operational parameters—including exposure time at critical pressures and hold durations during secondary drying—are manually documented to satisfy GLP and internal SOP requirements. For full 21 CFR Part 11 compliance, integration with validated electronic lab notebooks (ELN) is recommended.
Applications
- Stability studies of biologics under ICH Q5C guidelines, where residual moisture and cake morphology directly impact shelf life.
- Preparation of calibration standards and reference materials for HPLC, LC-MS, and elemental analysis—minimizing solvent-related degradation.
- Rapid desiccation of microbial cultures and tissue extracts prior to DNA/RNA extraction or proteomic profiling.
- Small-volume lyophilization of radiopharmaceutical intermediates under controlled inert gas environments (when used with optional nitrogen purge kits).
- Teaching laboratories conducting fundamental mass-transfer experiments in food science, material chemistry, and pharmaceutical engineering curricula.
FAQ
Does the DC401 include a built-in pre-freezing function?
No. The DC401 is a dedicated freeze dryer and does not incorporate a freezing chamber. Samples must be pre-frozen externally—typically at −40 °C or lower—to ensure complete solidification before loading onto the manifold.
What vacuum pump is recommended for optimal performance?
The YAMATO PD53 oil-sealed rotary vane pump is specifically matched to the DC401, achieving the specified ultimate vacuum of 6.7 × 10⁻² Pa with a nominal pumping speed of 50/60 L/min at 50/60 Hz.
Is the condenser drain port accessible for maintenance?
Yes—the stainless-steel condenser chamber features a bottom-mounted drain valve with sealing plug, allowing safe disposal of melted ice after hot-gas defrost cycles.
Can the DC401 be operated in continuous mode for extended runs?
Yes, provided ambient temperature remains ≤25 °C and ventilation clearance (≥10 cm on all sides) is maintained. The air-cooled compressor is rated for uninterrupted operation up to 72 hours under typical load conditions.
Are spare parts and service manuals available internationally?
YAMATO provides global technical support through authorized distributors; OEM spare parts—including R404A refrigerant kits, Pirani sensor assemblies, and manifold gaskets—are available under part numbers traceable to JIS Q 9001-certified supply chains.
