VHD Batch Oven
Downdraft Cure. Eclipse Burners. Built for Production.
RTT Finishing Solutions’ VHD Batch Ovens cure liquid and powder coatings on a wide range of industrial substrates, with a maximum operating temperature of 450°F. The VHD differs from RTT’s standard batch oven in its airflow architecture: a floor-mounted, pretested Eclipse Version 2 direct-fired burner box supplies heated air to a distribution plenum in the ceiling, which discharges the full airflow downward through the oven interior. This full overhead downdraft design – combined with dedicated combustion and exhaust blowers – produces optimal airflow balance within the enclosure, faster ramp-up times, and shorter batch processing cycles.
The standard VHD control panel is UL/cUL/ETL-listed and housed in a NEMA 12 enclosure. It includes a 3-phase main disconnect, motor contactors and protectors, an analog 1-second to 300-hour batch timer, a digital temperature controller with high-temperature rollback protection, FM-approved gas train components (high pressure, low pressure, and proof-of-closure safety switches; ventless regulator; dual blocking valve; 2–5 PSI recommended gas pressure), air proving switches for all critical fans, and a terminal strip connecting the panel to the burner box. The panel operates on 230V or 480V, 3-phase, 60Hz.
Standard VHD batch ovens ship with dual entry doors. Working dimensions range from 5 feet wide by 6 feet tall by 6 feet deep up to 10 feet wide by 10 feet tall by 14 feet deep across 43 standard configurations, with recirculating fan capacities from 1,080 SCFM at 1 HP to 8,400 SCFM at 7.5 HP. All RTT VHD Batch Ovens comply with applicable OSHA and NFPA regulations.
Features
- Maximum operating temperature: 450°F
- Full overhead downdraft airflow: floor-mounted burner box supplies heated air to ceiling distribution plenum; full overhead discharge into oven interior
- Eclipse Version 2 direct-fired air heat burners
- Dedicated combustion and exhaust blowers for optimal airflow balance
- Recirculating fan: 1,080–8,400 SCFM depending on model (1 HP–7.5 HP)
- Internal angle iron frame structure in all models
- 20-gauge aluminized steel with 4-inch insulated interlocking panels
- Slotted channel design reduces heat transfer at structural connections
- Explosion relief doors with FM-approved latches
- Standard dual entry doors; single entry also available
- In-house design and fabrication of oven panels and components
- Complies with applicable OSHA and NFPA regulations
Benefits
- Achieve faster ramp-up times and shorter batch cycles – the full overhead downdraft discharge design combined with dedicated combustion and exhaust blowers produces optimal airflow balance throughout the oven interior.
- Simplify installation – interlocking prefabricated insulated panels and a pretested burner box reduce field assembly time and startup risk.
- Operate with a fully safety-rated gas system out of the box – the FM-approved gas train with high pressure, low pressure, and proof-of-closure switches, ventless regulator, and dual blocking valve ships factory-installed and tested.
- Upgrade controls without replacing the oven – the standard panel is field-upgradeable to the SmartTouch PLC touchscreen with VFD exhaust fan control and digital chart recording.
- Scale the oven precisely to your production space – 43 standard working dimension configurations from 5′×6′×6′ to 10′×10′×14′ cover a wide range of part sizes and facility footprints.
- Reduce energy loss at the door – the optional AutoSeal metalized fabric roll-up door is engineered specifically for reduced energy consumption during oven operation.
Sizes & Specifications
RTT can design and build batch ovens in a variety of sizes and configurations. Although our team can engineer a custom oven to fit your needs, below are standard sizes that are quickly available to you.
| Model Number | Working Dimensions | Single Entry Outside Chamber | Double Entry Outside Chamber | Recirculating Fan | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Width | Height | Depth | Width | Height | Depth | Width | Height | Depth | SCFM | HP | |
| BO-VHD-05-06-06-SE | 5′ | 6′ | 6′ | 5’8″ | 7’10” | 10’8″ | 9’8″ | 7’10” | 6’8″ | 1,080 | 1HP |
| BO-VHD-05-06-07-SE | 5′ | 6′ | 7′ | 5’8″ | 7’10” | 11’8″ | 9’8″ | 7’10” | 7’8″ | 1,260 | 1HP |
| BO-VHD-05-06-08-SE | 5′ | 6′ | 8′ | 5’8″ | 7’10” | 12’8″ | 9’8″ | 7’10” | 8’8″ | 1,440 | 1.5HP |
| BO-VHD-05-06-10-SE | 5′ | 6′ | 10′ | 5’8″ | 7’10” | 14’8″ | 9’8″ | 7’10” | 10’8″ | 1,800 | 1.5HP |
| BO-VHD-05-06-12-SE | 5′ | 6′ | 12′ | 5’8″ | 7’10” | 16’8″ | 9’8″ | 7’10” | 12’8″ | 2,160 | 2HP |
| BO-VHD-06-06-06-SE | 6′ | 6′ | 6′ | 6’8″ | 7’10” | 10’8″ | 10’8″ | 7’10” | 6’8″ | 1,296 | 1HP |
| BO-VHD-06-06-08-SE | 6′ | 6′ | 8′ | 6’8″ | 7’10” | 12’8″ | 10’8″ | 7’10” | 8’8″ | 1,728 | 1.5HP |
| BO-VHD-06-06-10-SE | 6′ | 6′ | 10′ | 6’8″ | 7’10” | 14’8″ | 10’8″ | 7’10” | 10’8″ | 2,160 | 2HP |
| BO-VHD-06-06-12-SE | 6′ | 6′ | 12′ | 6’8″ | 7’10” | 16’8″ | 10’8″ | 7’10” | 12’8″ | 2,592 | 2HP |
| BO-VHD-06-06-14-SE | 6′ | 6′ | 14′ | 6’8″ | 7’10” | 18’8″ | 10’8″ | 7’10” | 14’8″ | 3,024 | 3HP |
| BO-VHD-06-06-16-SE | 6′ | 6′ | 16′ | 6’8″ | 7’10” | 20’8″ | 10’8″ | 7’10” | 16’8″ | 3,456 | 3HP |
| BO-VHD-06-07-06-SE | 6′ | 7′ | 6′ | 6’8″ | 8’10” | 10’8″ | 10’8″ | 8’10” | 6’8″ | 1,512 | 1.5HP |
| BO-VHD-06-07-08-SE | 6′ | 7′ | 8′ | 6’8″ | 8’10” | 12’8″ | 10’8″ | 8’10” | 8’8″ | 2,016 | 2HP |
| BO-VHD-06-07-10-SE | 6′ | 7′ | 10′ | 6’8″ | 8’10” | 14’8″ | 10’8″ | 8’10” | 10’8″ | 2,520 | 2HP |
| BO-VHD-06-07-12-SE | 6′ | 7′ | 12′ | 6’8″ | 8’10” | 16’8″ | 10’8″ | 8’10” | 12’8″ | 3,024 | 3HP |
| BO-VHD-06-07-14-SE | 6′ | 7′ | 14′ | 6’8″ | 8’10” | 18’8″ | 10’8″ | 8’10” | 14’8″ | 3,528 | 3HP |
| BO-VHD-06-07-16-SE | 6′ | 7′ | 16′ | 6’8″ | 8’10” | 20’8″ | 10’8″ | 8’10” | 16’8″ | 4,032 | 5HP |
| BO-VHD-06-08-06-SE | 6′ | 8′ | 6′ | 6’8″ | 9’10” | 10’8″ | 10’8″ | 9’10” | 6’8″ | 1,728 | 1.5HP |
| BO-VHD-06-08-08-SE | 6′ | 8′ | 8′ | 6’8″ | 9’10” | 12’8″ | 10’8″ | 9’10” | 8’8″ | 2,304 | 2HP |
| BO-VHD-06-08-10-SE | 6′ | 8′ | 10′ | 6’8″ | 9’10” | 14’8″ | 10’8″ | 9’10” | 10’8″ | 2,880 | 2HP |
| BO-VHD-06-08-12-SE | 6′ | 8′ | 12′ | 6’8″ | 9’10” | 16’8″ | 10’8″ | 9’10” | 12’8″ | 3,456 | 3HP |
| BO-VHD-06-08-14-SE | 6′ | 8′ | 14′ | 6’8″ | 9’10” | 18’8″ | 10’8″ | 9’10” | 14’8″ | 4,032 | 5HP |
| BO-VHD-06-08-16-SE | 6′ | 8′ | 16′ | 6’8″ | 9’10” | 20’8″ | 10’8″ | 9’10” | 16’8″ | 4,608 | 5HP |
| BO-VHD-07-07-07-SE | 7′ | 7′ | 7′ | 7’8″ | 8’10” | 11’8″ | 11’8″ | 8’10” | 7’8″ | 2,058 | 2HP |
| BO-VHD-07-07-08-SE | 7′ | 7′ | 8′ | 7’8″ | 8’10” | 12’8″ | 11’8″ | 8’10” | 8’8″ | 2,352 | 2HP |
| BO-VHD-07-07-10-SE | 7′ | 7′ | 10′ | 7’8″ | 8’10” | 14’8″ | 11’8″ | 8’10” | 10’8″ | 2,940 | 3HP |
| BO-VHD-07-07-12-SE | 7′ | 7′ | 12′ | 7’8″ | 8’10” | 16’8″ | 11’8″ | 8’10” | 12’8″ | 3,528 | 3HP |
| BO-VHD-07-07-14-SE | 7′ | 7′ | 14′ | 7’8″ | 8’10” | 18’8″ | 11’8″ | 8’10” | 14’8″ | 4,116 | 5HP |
| BO-VHD-07-07-16-SE | 7′ | 7′ | 16′ | 7’8″ | 8’10” | 20’8″ | 11’8″ | 8’10” | 16’8″ | 4,704 | 5HP |
| BO-VHD-08-08-08-SE | 8′ | 8′ | 8′ | 8’8″ | 9’10” | 12’8″ | 12’8″ | 9’10” | 8’8″ | 3,072 | 3HP |
| BO-VHD-08-08-10-SE | 8′ | 8′ | 10′ | 8’8″ | 9’10” | 14’8″ | 12’8″ | 9’10” | 10’8″ | 3,840 | 3HP |
| BO-VHD-08-08-12-SE | 8′ | 8′ | 12′ | 8’8″ | 9’10” | 16’8″ | 12’8″ | 9’10” | 12’8″ | 4,608 | 5HP |
| BO-VHD-08-08-14-SE | 8′ | 8′ | 14′ | 8’8″ | 9’10” | 18’8″ | 12’8″ | 9’10” | 14’8″ | 5,376 | 7.5HP |
| BO-VHD-08-08-16-SE | 8′ | 8′ | 16′ | 8’8″ | 9’10” | 20’8″ | 12’8″ | 9’10” | 16’8″ | 6,144 | 7.5HP |
| BO-VHD-08-08-20-SE | 8′ | 8′ | 20′ | 8’8″ | 9’10” | 24’8″ | 12’8″ | 9’10” | 20’8″ | 7,680 | 7.5HP |
| BO-VHD-08-10-08-SE | 8′ | 10′ | 8′ | 8’8″ | 11’10” | 12’8″ | 12’8″ | 11’10” | 8’8″ | 3,840 | 3HP |
| BO-VHD-08-10-10-SE | 8′ | 10′ | 10′ | 8’8″ | 11’10” | 14’8″ | 12’8″ | 11’10” | 10’8″ | 4,800 | 5HP |
| BO-VHD-08-10-12-SE | 8′ | 10′ | 12′ | 8’8″ | 11’10” | 16’8″ | 12’8″ | 11’10” | 12’8″ | 5,760 | 7.5HP |
| BO-VHD-08-10-14-SE | 8′ | 10′ | 14′ | 8’8″ | 11’10” | 18’8″ | 12’8″ | 11’10” | 14’8″ | 6,720 | 7.5HP |
| BO-VHD-08-10-16-SE | 8′ | 10′ | 16′ | 8’8″ | 11’10” | 20’8″ | 12’8″ | 11’10” | 16’8″ | 7,680 | 7.5HP |
| BO-VHD-10-10-10-SE | 10′ | 10′ | 10′ | 10’8″ | 11’10” | 14’8″ | 14’8″ | 11’10” | 10’8″ | 6,000 | 7.5HP |
| BO-VHD-10-10-12-SE | 10′ | 10′ | 12′ | 10’8″ | 11’10” | 16’8″ | 14’8″ | 11’10” | 12’8″ | 7,200 | 7.5HP |
| BO-VHD-10-10-14-SE | 10′ | 10′ | 14′ | 10’8″ | 11’10” | 18’8″ | 14’8″ | 11’10” | 14’8″ | 8,400 | 7.5HP |
Alternative Configuration: Double Entry (DE)
Controls
Standard Control Panel
Every RTT VHD Batch Oven ships with a UL/cUL/ETL-listed control panel in a NEMA 12 enclosure. The standard panel includes:
- 3-phase main disconnect
- Motor contactors and protectors
- Analog batch timer: 1 second to 300 hours
- Digital temperature controller with high-temperature limit and rollback protection
- FM-approved gas train: high pressure, low pressure, and proof-of-closure safety switches; ventless regulator; dual blocking valve; 2–5 PSI recommended gas pressure
- Air proving switches for all critical fans
- Terminal strip connecting control panel to burner box
- 230V/480V, 3-phase, 60Hz
Optional SmartTouch Upgrade
The standard panel is field-upgradeable to the SmartTouch PLC touchscreen control panel, which adds:
- 6-inch touchscreen with four batch modes and troubleshooting capabilities
- 1-second to 16-hour digital batch timer with countdown display
- Digital self-tuning temperature controller with high-temperature rollback protection
- Password-protected digital purge timer
- VFD control on exhaust fan for faster purge and cool-down cycles
- Digital chart recorder (additional cost)
Services
RTT provides end-to-end services tailored to every phase of your project, so you never have to look further than one trusted partner.
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Maintenance
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Help and Support
Access the resources, documentation, and technical support information you need to keep your RTT equipment operating safely, efficiently, and at peak performance.
Product Literature
Frequently Asked Questions
What Does the LOC Code Mean?
LOC codes indicate specific safety or operational conditions detected by the control system:
• LOC 2: No establishment of flame within the safety time
• LOC 3: Air pressure fault
• LOC 4: Extraneous light detected
• LOC 5: Air pressure welded in working position
• LOC 6: Actuator fault
• LOC 7: Loss of flame
These alerts help protect the system and ensure proper burner performance.
Why Does the Burner Shut Off and Return to Purge Mode?
This typically indicates a failed air switch.
Your system uses air switches on the combustion fan, recirculation fan, and exhaust fan.
If one of these switches does not provide airflow, the system returns to purge for safety.
Why Does My Oven Overshoot the Set Temperature?
This typically indicates a failed air switch.
Your system uses air switches on the combustion fan, recirculation fan, and exhaust fan.
If one of these switches does not provide airflow, the system returns to purge for safety.
What Is the Required Gas Pressure?
Your oven should operate with gas pressure between 2 PSI and 5 PSI.
Pressures outside this range may affect burner performance or safety.
How Do I Download Temperature History?
You can download temperature history directly from the Smart Control panel:
1. Open the Maintenance tab
2. Select Temperature History
3. Click Export
4. Follow the on-screen instructions to save the file
What Is the Proper Incoming Gas Pressure for the Valve Train and Burner?
Proper gas pressure is critical for safe and reliable operation.
• Gas pressure must never exceed the maximum rating of the valve train regulator.
• Excess pressure can damage internal components or prevent the valve train from shutting off gas during a shutdown, creating a serious safety hazard.
• Too little pressure reduces burner BTU output and may cause low-gas safety faults.
Typical pressure ranges:
• Ovens: 2–5 PSI
Additional Resources
Support Center
Frequently Asked Questions
Instructional Videos
Product Training
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