LEWCO Enhanced Duty Batch Ovens offer all of the same construction features as the normal duty ovens; however the performance is “enhanced” by adding additional heat capacity and larger circulation fans. Additionally, all enhanced duty walk-in ovens guarantee a temperature uniformity of +/- 10°F. The EWR series features a rear-mounted heater box, which is ideal for installations with height restrictions. Each unit comes complete with a one-year warranty and is fully assembled, wired, and tested prior to shipment. All LEWCO ovens are manufactured to meet the requirements of NFPA 86, the national standard for ovens and furnaces.
Operating Temperature
150°F (66°C) to 1200°F (649°C)
Heating Medium
Electric, low watt density Incoloy® heaters provide years of trouble free service. Standard heater bank assemblies are installed in high velocity ductwork to maximize heat transfer.
Airflow Pattern
Horizontal Airflow: Hot air is supplied from one side of the wall and pulled across horizontally to the opposite side wall.
Input Voltage
Standard: 480/3/60. Please consult factory for additional options.
Control System
LEWCO’s standard control package includes a single set-point process temperature controller and redundant high-limit controller. Circulation fan(s) and exhaust fan(s) include air proving circuits that are electrically interlocked with the heating circuit. All controls are housed in a NEMA 12 enclosure employing a full voltage lockable disconnect switch. Ovens operating at or above 800°F include a zero speed switch for fans. Controls are wired to NFPA 70 and 79 electrical standards in our own UL508A certified panel shop. Independent third party inspections available.
Optional:
Door Switch
Disables heat when door is opened on electrically heated ovens; holds burner at low fire on fuel-fired ovens.
Batch Timer
Infinitely adjustable up to 100 hrs., includes illuminated On/ Off switch to indicate timed operation and audible alarm when time has elapsed.
Ramp/ Soak Controller
Programmable ramp/ soak temperature controller with capability to store different recipes with multiple segments.
Chart Recorder
Single pen circular paper chart recorder for continuous monitoring of temperature data. Comes with (1) Type “J” thermocouple input.
PLC
Programmable Logic Controller for processes with numerous inputs and outputs; or requiring automation of material handling equipment. The PLC can also allow for Ethernet connectivity for remote system monitoring.
Touchscreen HMI
Human Machine Interface provides the operator easy access and control of different parts of the equipment. Allows real time monitoring and provides feedback of the process in a visual, easy to read format.
Composite Curing Controls:
Data Logger: Multiple input digital data logger continuously records temperature and other process data. Allows downloading of digital data files through USB or Ethernet connection. Data can also be viewed on a full color display or on a web server when connected to a network.
Thermocouple Jacks: Thermocouple jack panel for high-temperature Type “J” thermocouples, located inside the oven. Includes wiring to data logger if purchased.
Vacuum Ports: ½” NPT thru-wall vacuum ports, each with vacuum rated manual ball valve and indicating gauge. All ports are connected to a 1” NPT header.
Vacuum Pump: Includes motor starter circuit and connection to vacuum header pipe.
| Model (NFPA Class B) | Overall Dimensions | Door Swing Radius | Workspace Dimensions | Heater Bank (kW) |
Circulating Fan (CFM) |
Motor (HP) |
Air Changes per Minute | Exhaust Fan Capacity (CFM) | Exhaust Motor (HP) | Solvents per Batch (Gals.) |
Ships Fully Assembled | ||||
| “W | “D | “H | “W | “D | “H | ||||||||||
|
EWR12EH-48-48-60
|
94 | 118 | 81 | 24″ | 48 | 48 | 60 | 72 | 3,500 | 3 | 43.75 | N/A | N/A | 0 | Yes |
|
EWR12EH-48-48-72
|
94 | 124 | 93 | 24″ | 48 | 48 | 72 | 81 | 4,000 | 3 | 41.67 | N/A | N/A | 0 | Yes |
|
EWR12EH-48-48-96
|
98 | 128 | 117 | 24″ | 48 | 48 | 96 | 90 | 5,000 | 3 | 39.06 | N/A | N/A | 0 | Yes |
|
EWR12EH-48-72-72
|
98 | 158 | 93 | 24″ | 48 | 72 | 72 | 90 | 5,500 | 3 | 38.19 | N/A | N/A | 0 | Yes |
|
EWR12EH-48-72-96
|
106 | 158 | 117 | 24″ | 48 | 72 | 96 | 108 | 8,000 | 5 | 41.67 | N/A | N/A | 0 | Yes |
| EWR12EH-48-96-72 | 106 | 182 | 93 | 24″ | 48 | 96 | 72 | 108 | 8,000 | 5 | 41.67 | N/A | N/A | 0 | Yes |
| EWR12EH-48-96-96 | 110 | 189 | 117 | 24″ | 48 | 96 | 96 | 153 | 10,000 | 7 1/2 | 39.06 | N/A | N/A | 0 | Yes |
|
EWR12EH-60-60-60
|
110 | 140 | 81 | 30″ | 60 | 60 | 60 | 90 | 5,000 | 3 | 40.00 | N/A | N/A | 0 | Yes |
| EWR12EH-60-60-72 | 112 | 146 | 93 | 30″ | 60 | 60 | 72 | 99 | 6,000 | 3 | 40.00 | N/A | N/A | 0 | Yes |
| EWR12EH-60-60-96 | 118 | 146 | 117 | 30″ | 60 | 60 | 96 | 117 | 8,000 | 5 | 40.00 | N/A | N/A | 0 | Yes |
| EWR12EH-60-72-72 | 114 | 158 | 93 | 30″ | 60 | 72 | 72 | 108 | 7,000 | 5 | 38.89 | N/A | N/A | 0 | Yes |
| EWR12EH-60-72-96 | 122 | 165 | 117 | 30″ | 60 | 72 | 96 | 144 | 10,000 | 7 1/2 | 41.67 | N/A | N/A | 0 | Yes |
| EWR12EH-60-96-96 | 132 | 194 | 117 | 30″ | 60 | 96 | 96 | 162 | 14,000 | 10 | 43.75 | N/A | N/A | 0 | Yes |
|
EWR12EH-72-72-72
|
134 | 158 | 93 | 36″ | 72 | 72 | 72 | 117 | 9,000 | 7 1/2 | 41.67 | N/A | N/A | 0 | Yes |
| EWR12EH-72-72-96 | 138 | 170 | 117 | 36″ | 72 | 72 | 96 | 153 | 12,000 | 7 1/2 | 41.67 | N/A | N/A | 0 | Yes |
| EWR12EH-72-96-96 | 146 | 203 | 117 | 36″ | 72 | 96 | 96 | 180 | 16,000 | 10 | 41.67 | N/A | N/A | 0 | Yes |
Note: Sizes are approximate. LEWCO, Inc. reserves the right to change specifications without notice.
Standard oven construction includes a 16 gauge stainless steel interior with a 3/16″ plate steel exterior. Heat loss is minimized by a unique wall design featuring a welded inner shell and a completely isolated outer frame and covers.
Doors
Heavy-duty vertical lift, guillotine style door on an isolated door frame minimizes heat loss. Wire core gaskets create a tight seal for efficient heating.
Flooring
Standard ovens operating at or above 650°F include an insulated base (100 p.s.f. max)
Standard Options:
- Insulated with (1) pair inverted angle track
- Insulated with (1) pair 6” wide wheel guides
- Preheating
- Heat Treating
- Annealing
- Sintering
LEWCO industrial ovens are designed and manufactured to industry standards. Our engineers regularly work to keep updated with the latest revisions in industry codes. If there is a specific industry standard or code compliance that you require for your process heating application, please contact one of our highly knowledgeable applications engineers to learn how LEWCO can help!
About NFPA 86
The National Fire Protection Association’s standard, NFPA 86, documents the guidelines for the safe operation of industrial ovens and furnaces. All LEWCO ovens are designed and manufactured to meet the requirements of this standard. Oven and furnaces in which flammable volatiles or combustible materials are present in the work space are classified by NFPA 86 as “Class A.” Similarly, ovens and furnaces in which no flammable volatiles or combustible materials are present are classified as “Class B.” Due to the risk of fire or explosion, NFPA 86 requires specific safety equipment for all Class A ovens and furnaces. Fuel gas-fired ovens and furnaces also require safety equipment.
- Powered exhaust of capacity determined by maximum solvent loading.
- Explosion relief of adequate area determined by oven or furnace workspace volume.
Industry Standards
