The Yamato DNF-911 is the 540 L flagship of the DNF energy-saving convection-oven family (brochure model DNF910) — a wind-velocity-adjustable forced-circulation oven rated to 260 °C with dual 10-step blowers, dual exhaust dampers, microcomputer PID control, and 32-step program operation. It is the largest, highest-throughput oven in this batch, pairing 540 L of chamber volume with a 260 °C ceiling and adjustable airflow.
Key Specifications
| SKU | DNF-911 |
| Brochure model | DNF910 (540 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. 75 min |
| Capacity | 540 L |
| Internal dimensions (W×D×H) | 1090 × 500 × 1000 mm |
| External dimensions (W×D×H) | 1220 × 696 × 1675 mm |
| Heater | Stainless pipe heater, 1.65 kW × 2 |
| Blower | Sirocco fan / DC brushless motor, 10 W × 2, 10-step wind-velocity control |
| Power supply | 200V AC single-phase, 18A, 50/60 Hz (US nominal 220V) |
| Weight | Approx. 180 kg |
| Shelves | 8 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 540 L DNF-911 targets the highest-volume dry-heat processing to 260 °C in this batch. It handles large-batch and production-adjacent drying at high glassware and sample throughput, along with curing and heat conditioning across its wide, deep chamber. The dual 10-step fans let light or powdered loads be processed gently for airflow-sensitive drying, while program repeat and the operating-hours counter support extended constant-temperature soaks. With 8 shelves across 29 shelf positions, it accommodates mixed, multi-user facility-shared loads.
The dual adjustable-airflow blowers and dual 1.65 kW heaters maintain ±2.5 °C uniformity at 260 °C across the wide 1090 mm chamber — the reason to choose a forced-circulation oven over natural convection at this scale. (See gravity-vs-forced-convection-oven.)
Design Architecture
The DNF-911 uses wind-velocity-adjustable forced circulation driven by two sirocco fans on DC brushless motors (10 W × 2, 10 steps) with two 1.65 kW stainless pipe heaters, governed by a microcomputer PID controller (VI CR3 type) reading a K-thermocouple. Sliding-knob exhaust dampers on the front control venting. The SUS304 stainless interior and glass-wool insulation support uniform heating to 260 °C across the large 540 L 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, 18 A service (US nominal 220 V).
Frequently Asked Questions
What temperature range and uniformity does the DNF-911 deliver? Room temperature +5 °C to 260 °C, with ±0.5 °C adjustment accuracy and ±2.5 °C distribution accuracy at 260 °C, reaching maximum temperature in about 75 minutes.
How large is it and how many shelves does it hold? 540 L internal (1090 × 500 × 1000 mm), with 8 stainless shelves (15 kg/shelf) across 29 shelf-bracket steps.
What voltage does the DNF-911 require? 200V AC single-phase, 18A, 50/60 Hz (US nominal 220V) — have a licensed contractor complete the 200 V connection.
Can the airflow be adjusted? Yes. Two sirocco fans on DC brushless motors provide 10-step wind-velocity control, letting light or powdered loads be dried gently.
Is the DNF-911 programmable? Yes. It offers fixed temperature, auto-start, and auto-stop modes plus 32-step program operation, with timer, clock, and a total-operating-hours counter.
Ordering & Configuration
Standard delivery includes the oven, 8 stainless punching-metal shelves (15 kg/shelf), 16 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 / 18 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.
- Footprint, shelving, and rigging — 1220 × 696 × 1675 mm external, ~180 kg; confirm floor space, door swing, caster locking, dual back-surface exhaust routing, any additional shelves for the 29-position rack, and delivery plan for this floor-standing unit.
- Lead time and warranty — per Yamato standard capital-equipment terms.
Request a quote to configure the DNF-911 for your largest high-temperature drying workflows.
DNF wind-velocity-adjustable oven family (capacity ladder): DNF400/410 (90 L) → DNF600/610 (150 L) → DNF810 (300 L) → DNF910 (540 L, this unit). This flagship uses dual blowers and dual heaters on 200 V single-phase service.
