The Yamato SDP-400 is a 127.4 L programmable vacuum drying oven — the mid-large model of the USA-built SDP series, roughly 2.7× the chamber volume of the 47.2 L SDP-300/310. A fully programmable EZ-ZONE Watlow controller runs multiple ramp-and-soak profiles, a digital vacuum gauge shows chamber vacuum level, and a tempered-glass viewing window with positive-latch, spring-loaded door allows continuous, sealed monitoring. on a 115V supply, it suits larger-batch programmable vacuum drying, multi-tray solvent removal, and production-adjacent degassing where the 47.2 L bench models run out of shelf area.
Its 220V sister is SDP-410 (same 127.4 L chamber); step down to SDP-300/310 (47.2 L) or up to SDP-610 (264 L).
Key Specifications
| SKU | SDP-400 |
| Type | Vacuum drying oven, programmable |
| Internal capacity | 127.4 L |
| Operating temperature range | RT +10 °C ~ 220 °C |
| Operating vacuum range | -3.0 ~ -29.9 inHg (-10 ~ 101 kPa) |
| Vacuum display range | 0.0 ~ -29.9 inHg (5 to -101 kPa) |
| Controls | EZ-ZONE Watlow (digital, programmable) |
| Display resolution | 0.1 °C |
| Access port | KF25 |
| Temperature uniformity (midrange) | ± 6.0 % of setpoint |
| Temperature stability | ±0.2 °C @ 80 °C; ±0.25 °C @ 150 °C; ±0.3 °C @ 220 °C |
| Heat-up time (from RT 20 °C) | 70 min @ 80 °C; 120 min @ 150 °C; 230 min @ 220 °C |
| Cool-down time (to 50 °C) | 161 min from 80 °C; 318 min from 150 °C; 420 min from 220 °C |
| Internal dimensions (W×D×H) | 457 × 610 × 457 mm (18 × 24 × 18 in) |
| External dimensions (W×D×H) | 686 × 895 × 833 mm (27.0 × 35.2 × 32.8 in) |
| Interior material | 300-series stainless steel |
| Exterior material | Painted cold-rolled steel |
| Standard chamber gasket | Silicone |
| Shelves | Shelf 287 × 483 mm (11.3 × 19 in); 6 shelf-rest steps |
| Weight | ~144 kg |
| Voltage | AC110–120V, 13A, 50/60 Hz (with plug) |
Made in the USA. TUV safety-requirement compliant. Per-shelf weight capacity and maximum total load are not separately itemized for the 127.4 L model in the brochure — confirm with Yamato at quote.
Application Profile
Larger-batch programmable vacuum drying. The 127.4 L chamber and 6 shelf-rest positions let far more trays or vessels dry per cycle than the 47.2 L bench models, on the same Watlow ramp-and-soak profiles. Reduced pressure lowers solvent and moisture boiling points so heat-sensitive materials dry gently.
Multi-tray solvent removal. Multi-segment profiles remove residual solvents from powders, films, and reaction products on a defined thermal schedule across a full shelf stack.
Production-adjacent degassing and outgassing. Reduced pressure drives dissolved gases and volatiles out of resins, adhesives, and cast materials before curing or measurement, at pilot/scale-up batch sizes.
Moisture-sensitive sample preparation at scale. Bound and surface moisture is removed from hygroscopic reagents and materials before weighing, coating, or analysis, without oxidative exposure.
Continuous monitored drying. The tempered-glass window and 0.1 °C-resolution digital display allow samples to be watched under vacuum throughout a run.
Design Architecture
The SDP-400 evacuates a 300-series stainless chamber (127.4 L) through a KF25 access port to as low as -29.9 inHg (-101 kPa), read on a digital vacuum gauge. An EZ-ZONE Watlow controller governs temperature from RT +10 °C to 220 °C at 0.1 °C display resolution, with ±6.0 % of setpoint midrange uniformity and stability of ±0.2 °C at 80 °C. Discrete ramp-and-soak profiles run a multi-step drying/degassing method automatically.
Door and seal. A positive-latch handle with spring-loaded glass maintains a good vacuum seal; the standard chamber gasket is silicone. The tempered-glass viewing window allows safe, continuous sample monitoring.
Thermal performance. From a 20 °C room the chamber reaches 80 °C in ~70 min, 150 °C in ~120 min, and 220 °C in ~230 min; the larger mass cools to 50 °C in 161/318/420 min from 80/150/220 °C respectively — longer than the 47.2 L models, as expected for the greater chamber volume.
Chamber and shelving. The 457 × 610 × 457 mm interior offers 6 shelf-rest steps with 287 × 483 mm shelves.
Safety. Built-in over-temperature protection and TUV-compliant construction. Never use in a flammable or explosive gas atmosphere, and never process explosive or flammable material. High-temperature components — observe burn-hazard cautions.
Frequently Asked Questions
What is the SDP-400's chamber capacity? 127.4 L — the mid-large SDP model, roughly 2.7× the volume of the 47.2 L SDP-300/310.
What temperature and vacuum range does it reach? RT +10 °C to 220 °C, evacuated through a KF25 port to as low as -29.9 inHg (-101 kPa), read on a digital vacuum gauge.
What controller does it use? A fully programmable EZ-ZONE Watlow controller at 0.1 °C resolution, running multi-step ramp-and-soak profiles.
How is the SDP-400 different from the SDP-410? Same 127.4 L chamber; the SDP-400 is the AC110–120V (13A) configuration, while the SDP-410 is the 220–240V sibling.
Does it include a vacuum pump? No. It connects via KF25 to an external pump; Yamato lists matched GLD202 (oil) and NEODRY15G2 (dry) kits — confirm at quote.
Ordering & Configuration
Included: 3 shelves, 12 shelf clips, 1 power cord, and 4 leveling feet.
Pair with a vacuum pump. The SDP-400 connects via KF25 to an external pump; Yamato lists matched kits including the GLD202 oil vacuum pump with rubber- or SUS-hose kit (115V) and the NEODRY15G2 dry-vacuum-pump kit. Confirm pump selection at quote.
Confirm voltage and plug. The SDP-400 is the AC110–120V (13A) configuration; the SDP-410 is the 220–240V sibling on the same 127.4 L chamber. Confirm supply and receptacle at order.
Select gasket for your chemistry. Silicone is standard; Buna-N, fluorosilicone, and Viton door gaskets are available options — match to solvent/temperature exposure at quote.
Confirm application fit and load ratings. Verify sample chemistry, target temperature/vacuum, batch size versus 127.4 L, and confirm per-shelf and total load limits with Yamato (not separately itemized in the brochure for this model).
Request a quote for pricing, vacuum-pump pairing, gasket selection, voltage/plug configuration, load ratings, lead time, and warranty. Warranty per Yamato standard capital-equipment terms — confirm at quote.
Yamato SDP vacuum drying oven series:
- SDP-300 — 47.2 L, 110–120V
- SDP-310 — 47.2 L, 220–240V
- SDP-400 (this product) — 127.4 L, 110–120V
- SDP-410 — 127.4 L, 220–240V
- SDP-610 — 264 L, 230V
