The Yamato DNF-811 is the 300 L floor-standing member of the DNF energy-saving convection-oven family (brochure model DNF810) — a wind-velocity-adjustable forced-circulation oven rated to 260 °C with a 10-step blower, exhaust damper, microcomputer PID control, and 32-step program operation. It is the large-capacity, 200 V single-phase unit for high-throughput drying and conditioning to 260 °C.
Key Specifications
| SKU | DNF-811 |
| Brochure model | DNF810 (300 L) |
| Type | Wind-velocity-adjustable, forced-circulation oven (with exhaust damper) |
| Temperature control range | Room temp. +5 °C to 260 °C |
| Temperature adjustment accuracy | ±0.5 °C (at 260 °C) |
| Temperature distribution accuracy | ±2.5 °C (at 260 °C) |
| Time to reach max. temp. | Approx. 60 min |
| Capacity | 300 L |
| Internal dimensions (W×D×H) | 600 × 500 × 1000 mm |
| External dimensions (W×D×H) | 730 × 696 × 1675 mm |
| Heater | Stainless pipe heater, 1.35 kW × 2 |
| Blower | Sirocco fan / DC brushless motor, 10 W, 10-step wind-velocity control |
| Power supply | 200V AC single-phase, 15A, 50/60 Hz (US nominal 220V) |
| Weight | Approx. 113 kg |
| Shelves | 4 stainless punching-metal shelves (15 kg/shelf); 29 shelf-bracket steps at 30 mm |
| Controller | PID by microcomputer (VI CR3 type), K-thermocouple |
Application Profile
The 300 L DNF-811 targets high-throughput and tall-load dry-heat processing to 260 °C. It handles high-volume, high-temperature drying of large glassware sets, sample trays, and taller apparatus, curing and heat conditioning at production-adjacent scale, and airflow-sensitive drying where the 10-step fan lets light or powdered loads be processed gently. Extended constant-temperature soaks run with program repeat and the operating-hours counter, and 29 shelf positions accommodate mixed multi-user loads in facility-shared settings.
The adjustable-airflow blower plus front exhaust damper maintain ±2.5 °C uniformity at 260 °C in the large 300 L chamber, with dual 1.35 kW heaters supporting a ~60-minute rise time. (See gravity-vs-forced-convection-oven.)
Design Architecture
The DNF-811 uses wind-velocity-adjustable forced circulation via a sirocco fan on a DC brushless motor (10 W, 10 steps) with two 1.35 kW stainless pipe heaters, governed by a microcomputer PID controller (VI CR3 type) reading a K-thermocouple. A sliding-knob exhaust damper on the front controls venting. The SUS304 stainless interior and glass-wool insulation support uniform heating to 260 °C across the tall 1000 mm chamber. Operation modes include fixed temperature, auto-start, auto-stop, and 32-step program operation, plus timer, clock, total-operating-hours counter, fan control, and calibration offset. Dual 50 mm exhaust openings are on the back surface; cable and intake ports (30 mm) are on the right surface.
Safety includes an earth-leakage breaker, an independent overheating-prevention device, a key-lock function, and self-diagnostics for sensor error, heater disconnection, triac short circuit, and automatic overheating prevention. This model is specified for 200V AC single-phase, 15 A service (US nominal 220 V).
Frequently Asked Questions
What temperature range does the DNF-811 reach? Room temperature +5 °C to 260 °C, with ±0.5 °C adjustment accuracy and ±2.5 °C distribution accuracy at 260 °C.
What makes the DNF-811 "wind-velocity-adjustable"? A sirocco fan on a DC brushless motor offers 10-step wind-velocity control, plus a front sliding-knob exhaust damper, so light or powdered loads can be processed gently.
What power supply does it need? 200V AC single-phase, 15 A, 50/60 Hz (US nominal 220V).
How many shelves does the DNF-811 hold? It ships with 4 stainless punching-metal shelves (15 kg/shelf) and 8 brackets, across 29 shelf-bracket steps at 30 mm.
Can it run programmed cycles? Yes — 32-step program operation plus fixed-temperature, auto-start, and auto-stop modes.
Ordering & Configuration
Standard delivery includes the oven, 4 stainless punching-metal shelves (15 kg/shelf), 8 shelf brackets, and the instruction manual. Optional extra shelves, larger cable ports, and door options are available.
Confirm at quote:
- Voltage and plug — 220V-nominal variant maps to the brochure's 200V AC single-phase / 15 A rating; confirm your service and have a licensed contractor complete the 200 V connection.
- Temperature and program profile — target ≤ 260 °C, ramp/soak steps, and airflow (fan-step) preference.
- Floor footprint, access, and shelving — 730 × 696 × 1675 mm external, ~113 kg; confirm floor space, door swing, caster locking, dual back-surface exhaust routing, and any additional shelves for the 29-position rack.
- Lead time and warranty — per Yamato standard capital-equipment terms.
Request a quote to configure the DNF-811 for your high-volume drying and conditioning workflow.
DNF wind-velocity-adjustable oven family (capacity ladder): DNF400/410 (90 L) → DNF600/610 (150 L) → DNF810 (300 L, this unit) → DNF910 (540 L). The 300 L and 540 L sizes are 200 V single-phase floor-standing units.
