Model: SWT03ED – Walk-In Oven

Operating Temperature

200°F (93°C) to 350°F (177°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

Dual (Combination) Airflow: Hot air is supplied from both of the side walls and returned through a top plenum.

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. Controls are wired to NFPA 70 and 79 electrical standards. Other third party certifications 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 Workspace Volume (cubic ft.) 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
SWT03ED-48-48-60
78 59 91 34″ 48 48 60 80 36 1,000 1 12.50 N/A N/A 0 Yes
SWT03ED-48-48-72
78 59 103 34″ 48 48 72 96 36 1,400 1 14.58 N/A N/A 0 Yes
SWT03ED-48-48-96
78 59 127 34″ 48 48 96 128 36 1,700 1 13.28 N/A N/A 0 Yes
SWT03ED-60-60-60
90 71 91 40″ 60 60 60 125 36 1,400 1 11.20 N/A N/A 0 Yes
SWT03ED-60-60-72 90 71 103 40″ 60 60 72 150 36 1,700 1 11.33 N/A N/A 0 Yes
SWT03ED-60-60-96 90 71 127 40″ 60 60 96 200 36 2,500 2 12.50 N/A N/A 0 Yes
SWT03ED-72-72-72
102 83 103 46″ 72 72 72 216 36 2,500 2 11.57 N/A N/A 0 Yes
SWT03ED-72-72-96 102 83 132 46″ 72 72 96 288 45 3,500 3 12.15 N/A N/A 0 Yes
SWT03ED-72-120-96
104 131 145 46″ 72 120 96 480 63 5,500 3 11.46 N/A N/A 0 No
SWT03ED-84-84-84 116 95 134 52″ 84 84 84 343 54 4,000 3 11.66 N/A N/A 0 Yes
SWT03ED-84-96-84 120 107 133 52″ 84 96 84 392 54 4,500 3 11.48 N/A N/A 0 Yes
SWT03ED-84-120-84
122 131 134 52″ 84 120 84 490 63 5,500 3 11.22 N/A N/A 0 Yes
SWT03ED-84-120-96
122 131 151 52″ 84 120 96 560 63 7,000 5 12.50 N/A N/A 0 No
SWT03ED-96-96-96 128 107 146 58″ 96 96 96 512 63 6,000 3 11.72 N/A N/A 0 No
SWT03ED-96-120-96
132 131 145 58″ 96 120 96 640 72 8,000 5 12.50 N/A N/A 0 No
SWT03ED-96-144-96
134 155 146 58″ 96 144 96 768 81 9,000 7 1/2 11.72 N/A N/A 0 No
SWT03ED-96-168-96
134 179 151 58″ 96 168 96 896 90 12,000 7 1/2 11.16 N/A N/A 0 No
SWT03ED-96-192-96
136 203 158 58″ 96 192 96 1,024 99 12,000 7 1/2 11.72 N/A N/A 0 No
SWT03ED-96-240-96
140 251 163 58″ 96 240 96 1,280 108 16,000 10 12.50 N/A N/A 0 No
SWT03ED-96-240-120
142 251 191 58″ 96 240 120 1,600 135 18,000 15 11.25 N/A N/A 0 No
SWT03ED-96-288-96
142 299 167 58″ 96 288 96 1,536 135 18,000 15 11.72 N/A N/A 0 No
SWT03ED-96-288-120
144 299 203 58″ 96 288 120 1,920 153 22,000 15 11.46 N/A N/A 0 No
SWT03ED-96-336-96
144 347 174 58″ 96 336 96 1,792 153 22,000 15 11.16 N/A N/A 0 No
SWT03ED-96-336-120
148 347 205 58″ 96 336 120 2,240 171 26,000 15 11.61 N/A N/A 0 No
SWT03ED-120-120-96
158 131 147 70″ 120 120 96 800 81 9,000 7 1/2 11.25 N/A N/A 0 No
SWT03ED-120-120-120
160 131 182 70″ 120 120 120 1,000 90 12,000 7 1/2 12.00 N/A N/A 0 No
SWT03ED-120-144-96
160 155 156 70″ 120 144 96 960 90 12,000 7 1/2 12.50 N/A N/A 0 No
SWT03ED-120-144-120
162 155 182 70″ 120 144 120 1,200 99 14,000 10 11.67 N/A N/A 0 No
SWT03ED-120-168-96
162 179 158 70″ 120 168 96 1,120 99 14,000 10 12.50 N/A N/A 0 No
SWT03ED-120-168-120
164 179 189 70″ 120 168 120 1,400 108 16,000 10 11.43 N/A N/A 0 No
SWT03ED-120-192-96
164 203 163 70″ 120 192 96 1,280 108 16,000 10 12.50 N/A N/A 0 No
SWT03ED-120-192-120
166 203 189 70″ 120 192 120 1,600 135 18,000 15 11.25 N/A N/A 0 No
SWT03ED-120-240-96
166 251 165 70″ 120 240 96 1,600 135 18,000 15 11.25 N/A N/A 0 No
SWT03ED-120-240-120
168 251 204 70″ 120 240 120 2,000 153 24,000 15 11.00 N/A N/A 0 No
SWT03ED-120-288-96
168 299 178 70″ 120 288 96 1,920 153 22,000 15 11.46 N/A N/A 0 No
SWT03ED-120-288-120
172 299 212 70″ 120 288 120 2,400 171 28,000 15 11.67 N/A N/A 0 No
SWT03ED-120-336-96
172 347 181 70″ 120 336 96 2,240 171 26,000 15 11.61 N/A N/A 0 No
SWT03ED-120-336-120
172 347 212 70″ 120 336 120 2,800 189 30,000 20 10.71 N/A N/A 0 No
Model (NFPA Class A) Overall Dimensions Door Swing Radius Workspace Dimensions Workspace Volume (cubic ft.) 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
SWT03ED-48-48-60
78 59 91 34″ 48 48 60 80 36 1,000 1 12.50 62 1/4 0.06 Yes
SWT03ED-48-48-72
78 59 103 34″ 48 48 72 96 36 1,400 1 14.58 62 1/4 0.06 Yes
SWT03ED-48-48-96
78 59 127 34″ 48 48 96 128 36 1,700 1 13.28 62 1/4 0.06 Yes
SWT03ED-60-60-60
90 71 91 40″ 60 60 60 125 36 1,400 1 11.20 62 1/4 0.06 Yes
SWT03ED-60-60-72 90 71 103 40″ 60 60 72 150 36 1,700 1 11.33 62 1/4 0.06 Yes
SWT03ED-60-60-96 90 71 127 40″ 60 60 96 200 45 2,500 2 12.50 62 1/4 0.06 Yes
SWT03ED-72-72-72
102 83 103 46″ 72 72 72 216 45 2,500 2 11.57 62 1/4 0.06 Yes
SWT03ED-72-72-96 102 83 132 46″ 72 72 96 288 54 3,500 3 12.15 62 1/4 0.06 Yes
SWT03ED-72-120-96
104 131 145 46″ 72 120 96 480 63 5,500 3 11.46 250 1/4 0.10 No
SWT03ED-84-84-84 116 95 134 52″ 84 84 84 343 54 4,000 3 11.66 250 1 0.10 No
SWT03ED-84-96-84 120 107 133 52″ 84 96 84 392 63 4,500 3 11.48 250 1 0.10 No
SWT03ED-84-120-84
122 131 134 52″ 84 120 84 490 81 5,500 3 11.22 250 1 0.25 No
SWT03ED-84-120-96
122 131 151 52″ 84 120 96 560 81 7,000 5 12.50 250 1 0.25 No
SWT03ED-96-96-96 128 107 146 58″ 96 96 96 512 81 6,000 3 11.72 250 1/4 0.25 No
SWT03ED-96-120-96
132 131 145 58″ 96 120 96 640 90 8,000 5 12.50 250 1/4 0.25 No
SWT03ED-96-144-96
134 155 146 58″ 96 144 96 768 90 9,000 7 1/2 11.72 250 1/4 0.25 No
SWT03ED-120-120-96
158 131 147 70″ 120 120 96 800 99 9,000 7 1/2 11.25 250 1/4 0.25 No
SWT03ED-120-120-120
160 131 182 70″ 120 120 120 1,000 108 12,000 7 1/2 12.00 250 1/4 0.25 No
SWT03ED-120-144-96
160 155 156 70″ 120 144 96 960 108 12,000 7 1/2 12.50 250 1/4 0.25 No
SWT03ED-120-144-120
162 155 182 70″ 120 144 120 1,200 126 14,000 10 11.67 250 1/4 0.25 No
SWT03ED-120-168-96
162 179 158 70″ 120 168 96 1,120 126 14,000 10 12.50 250 1/4 0.25 No
SWT03ED-120-168-120
164 179 189 70″ 120 168 120 1,400 153 16,000 10 11.43 750 1 0.51 No
SWT03ED-120-192-96
164 203 163 70″ 120 192 96 1,280 144 16,000 10 12.50 750 1 0.51 No
SWT03ED-120-192-120
166 203 189 70″ 120 192 120 1,600 180 18,000 15 11.25 1,000 1 1/2 0.77 No
SWT03ED-120-240-96
166 251 165 70″ 120 240 96 1,600 180 18,000 15 11.25 1,000 1 1/2 0.77 No
SWT03ED-120-240-120
168 251 204 70″ 120 240 120 2,000 198 24,000 15 11.00 1,000 1 1/2 0.77 No
SWT03ED-120-288-96
168 299 178 70″ 120 288 96 1,920 198 22,000 15 11.46 1,000 1 1/2 0.77 No
SWT03ED-120-288-120
172 299 212 70″ 120 288 120 2,400 225 28,000 15 11.67 1,000 1 1/2 0.77 No
SWT03ED-120-336-96
172 347 181 70″ 120 336 96 2,240 225 26,000 15 11.61 1,000 1 1/2 0.77 No
SWT03ED-120-336-120
172 347 212 70″ 120 336 120 2,800 261 30,000 20 10.71 1,000 1 1/2 0.77 No

Note: Sizes are approximate. LEWCO, Inc. reserves the right to change specifications without notice.

Standard oven construction includes a 16 gauge aluminized steel interior with a 18 gauge cold rolled 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 doors on an isolated door frame minimize heat loss. Wire core gaskets create a tight seal for efficient heating. Standard doors are bi-parting swing at one end and include explosion venting latches.

     Standard Options:

  • Bi-parting swing doors at both ends
  • Vertical lift guillotine door at one or both ends
  • Door windows

Flooring

Standard ovens include a 12 gauge steel plate floor.

     Standard Options:

  • 12 gauge plate floor with (1) pair inverted angle track
  • 12 gauge plate floor with (1) pair 6” wide wheel guides
  • Insulated (100 p.s.f. max)
  • Insulated with (1) pair inverted angle track
  • Insulated with (1) pair 6” wide wheel guides
  • No floor

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