Model: SWT03FD – Walk-In Oven

DATA SHEET OWNER'S MANUAL REQUEST A QUOTE

Operating Temperature 

200°F (93°C) to 350°F (177°C)

Heating Medium

Direct fired natural gas modulating burner with direct coupled, digital actuated control valve. High turndown ratio allows for rapid heat-up and tight temperature controls.

  • Low CO and NOX emissions
  • F.M. compliant fuel train

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 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 Workspace Volume (cubic ft.) Burner (BTU/ Hr) 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
SWT03FD-48-48-60
 80 74 146 34″ 48 48 60 80 200,000 1,000 1 12.50 100 1/4 0 Yes
SWT03FD-48-48-72
 80 74 158 34″ 48 48 72 96 200,000 1,400 1 14.58 100 1/4 0 Yes
SWT03FD-48-48-96
 80 74 152 34″ 48 48 96 128 200,000 1,700 1 13.28 100 1/4 0 Yes
SWT03FD-60-60-60
 92 86 146 40″ 60 60 60 125 200,000 1,400 1 11.20 100 1/4 0 Yes
SWT03FD-60-60-72
 92 86 128 40″ 60 60 72 150 200,000 1,700 1 11.33 100 1/4 0 Yes
SWT03FD-60-60-96
 92 86 153 40″ 60 60 96 200 200,000 2,500 2 12.50 100 1/4 0 No
SWT03FD-72-72-72
 104 98 158 46″ 72 72 72 216 200,000 2,500 2 11.57 100 1/4 0 Yes
SWT03FD-72-72-96
 104 98 159 46″ 72 72 96 288 200,000 3,500 3 12.15 100 1/4 0 No
SWT03FD-72-120-96
 104 131 145 46″ 72 120 96 480 200,000 5,500 3 11.46 100 1/4 0 No
SWT03FD-84-84-84 116 95 161 52″ 84 84 84 343 200,000 4,000 3 11.66 100 1/4 0 Yes
SWT03FD-84-96-84 120 107 160 52″ 84 96 84 392 200,000 4,500 3 11.48 100 1/4 0 Yes
SWT03FD-84-120-84
 122 131 161 52″ 84 120 84 490 400,000 5,500 3 11.22 250 1/4 0 Yes
SWT03FD-84-120-96
 122 131 178 52″ 84 120 96 560 400,000 7,000 5 12.50 250 1/4 0 Yes
SWT03FD-96-96-96 128 107 173 58″ 96 96 96 512 400,000 6,000 3 11.72 250 1/4 0 No
SWT03FD-96-120-96
 132 131 145 58″ 96 120 96 640 400,000 8,000 5 12.50 250 1/4 0 No
SWT03FD-96-144-96
 134 155 173 58″ 96 144 96 768 400,000 9,000 7 1/2 11.72 250 1/4 0 No
SWT03FD-96-168-96
 134 179 178 58″ 96 168 96 896 400,000 12,000 7 1/2 13.39 250 1/4 0 No
SWT03FD-96-192-96
 136 203 185 58″ 96 192 96 1,024 400,000 12,000 7 1/2 11.72 250 1/4 0 No
SWT03FD-96-240-96
 140 251 190 58″ 96 240 96 1,280 700,000 16,000 10 12.50 500 1 0 No
SWT03FD-96-240-120
 142 251 218 58″ 96 240 120 1,600 700,000 18,000 15 11.25 500 1 0 No
SWT03FD-96-288-96
 142 299 194 58″ 96 288 96 1,536 700,000 18,000 15 11.72 500 1 0 No
SWT03FD-96-288-120
 144 299 230 58″ 96 288 120 1,920 700,000 22,000 15 11.45 500 1 0 No
SWT03FD-96-336-96
 144 347 201 58″ 96 336 96 1,792 700,000 22,000 15 12.27 500 1 0 No
SWT03FD-96-336-120
 148 347 232 58″ 96 336 120 2,240 700,000 26,000 15 11.61 500 1 0 No
SWT03FD-120-120-96
 158 131 174 70″ 120 120 96 800 400,000 9,000 7 1/2 11.25 250 1/4 0 No
SWT03FD-120-120-120
 160 131 209 70″ 120 120 120 1,000 400,000 12,000 7 1/2 12.00 250 1/4 0 No
SWT03FD-120-144-96
 160 155 183 70″ 120 144 96 960 400,000 12,000 7 1/2 12.50 250 1/4 0 No
SWT03FD-120-144-120
 162 155 209 70″ 120 144 120 1,200 400,000 14,000 10 11.67 250 1/4 0 No
SWT03FD-120-168-96
 162 179 185 70″ 120 168 96 1,120 400,000 14,000 10 12.50 250 1/4 0 No
SWT03FD-120-168-120
 164 179 216 70″ 120 168 120 1,400 700,000 16,000 10 11.43 500 1 0 No
SWT03FD-120-192-96
 164 203 190 70″ 120 192 96 1,280 700,000 16,000 10 12.50 500 1 0 No
SWT03FD-120-192-120
 162 203 216 70″ 120 192 120 1,600 700,000 18,000 15 11.25 500 1 0 No
SWT03FD-120-240-96
 166 251 192 70″ 120 240 96 1,600 700,000 18,000 15 11.25 500 1 0 No
SWT03FD-120-240-120
 168 251 231 70″ 120 240 120 2,000 700,000 24,000 15 12.00 500 1 0 No
SWT03FD-120-288-96
 168 299 205 70″ 120 288 96 1,920 700,000 22,000 15 11.46 500 1 0 No
SWT03FD-120-288-120
 172 299 239 70″ 120 288 120 1,400 700,000 28,000 15 11.67 500 1 0 No
SWT03FD-120-336-96
 172 347 208 70″ 120 336 96 2,240 700,000 26,000 15 11.61 500 1 0 No
SWT03FD-120-336-120
 172 347 240 70″ 120 336 120 2,800 1,000,000 30,000 20 10.71 500 1 0 No
Model (NFPA Class A) Overall Dimensions Door Swing Radius Workspace Dimensions Workspace Volume (cubic ft.) Burner (BTU/ Hr) 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
SWT03FD-48-48-60
 78 74 146 34″ 48 48 60 80 200,000 1,000 1 12.50 250 1/4 0.06 Yes
SWT03FD-48-48-72
 80 74 158 34″ 48 48 72 96 200,000 1,400 1 14.58 250 1/4 0.06 Yes
SWT03FD-48-48-96
 100 59 193 34″ 48 48 96 128 200,000 1,700 1 13.28 250 1/4 0.06 No
SWT03FD-60-60-60
 92 86 146 40″ 60 60 60 125 200,000 1,400 1 11.20 250 1/4 0.06 Yes
SWT03FD-60-60-72
 114 71 218 40″ 60 60 72 150 200,000 1,700 1 11.33 250 1/4 0.06 No
SWT03FD-60-60-96
 86 71 194 40″ 60 60 96 200 200,000 2,500 2 12.50 250 1/4 0.06 No
SWT03FD-72-72-72
 104 98 158 46″ 72 72 72 216 200,000 2,500 2 11.57 250 1/4 0.06 Yes
SWT03FD-72-72-96
 98 98 230 46″ 72 72 96 288 200,000 3,500 3 12.15 250 1/4 0.06 No
SWT03FD-72-120-96
 104 131 145 46″ 72 120 96 480 200,000 5,500 3 11.46 250 1/4 0.10 No
SWT03FD-84-84-84 116 95 161 52″ 84 84 84 343 200,000 4,000 3 11.66 250 1/4 0.10 Yes
SWT03FD-84-96-84 120 107 160 52″ 84 96 84 392 200,000 4,500 3 11.48 250 1/4 0.10 Yes
SWT03FD-84-120-84
 122 131 161 52″ 84 120 84 490 400,000 5,500 3 11.22 500 1 0.25 Yes
SWT03FD-84-120-96
 122 131 178 52″ 84 120 96 560 400,000 7,000 5 12.50 500 1 0.25 Yes
SWT03FD-96-96-96 128 107 173 58″ 96 96 96 512 400,000 6,000 3 11.72 500 1 0.25 No
SWT03FD-96-120-96
 132 131 145 58″ 96 120 96 640 400,000 8,000 5 12.50 500 1 0.25 No
SWT03FD-96-144-96
 134 155 173 58″ 96 144 96 768 400,000 9,000 7 1/2 11.72 500 1 0.25 No
SWT03FD-120-120-96
 158 131 180 70″ 120 120 96 800 400,000 9,000 7 1/2 11.25 500 1 0.25 No
SWT03FD-120-120-120
 160 131 186 70″ 120 120 120 1,000 400,000 12,000 7 1/2 12 500 1 0.25 No
SWT03FD-120-144-96
 160 155 193 70″ 120 144 96 960 400,000 12,000 7 1/2 12.50 500 1 0.25 No
SWT03FD-120-144-120
 162 155 218 70″ 120 144 120 1,200 400,000 14,000 10 11.66 500 1 0.25 No
SWT03FD-120-168-96
 162 179 194 70″ 120 168 96 1,120 400,000 14,000 10 12.50 500 1 0.25 No
SWT03FD-120-168-120
 164 179 230 70″ 120 168 120 1,400 700,000 16,000 10 11.43 1,000 1 1/2 0.51 No
SWT03FD-120-192-96
 164 203 201 70″ 120 192 96 1,280 700,000 16,000 10 12.50 1,000 1 1/2 0.51 No
SWT03FD-120-192-120
 166 203 232 70″ 120 192 120 1,600 700,000 18,000 15 11.25 1,000 1 1/2 0.77 No
SWT03FD-120-240-96
 166 251 176 70″ 120 240 96 1,600 700,000 18,000 15 11.25 1,000 1 1/2 0.77 No
SWT03FD-120-240-120
 168 251 210 70″ 120 240 120 2,000 700,000 18,000 15 11.00 1,000 1 1/2 0.77 No
SWT03FD-120-288-96
 168 299 186 70″ 120 288 96 1,920 700,000 24,000 15 11.46 1,000 1 1/2 0.77 No
SWT03FD-120-288-120
 172 299 211 70″ 120 288 120 2,400 700,000 28,000 15 11.67 1,000 1 1/2 0.77 No
SWT03FD-120-336-96
 172 347 187 70″ 120 336 96 2,240 700,000 26,000 15 11.61 1,000 1 1/2 0.77 No
SWT03FD-120-336-120
 172 347 217 70″ 120 336 120 2,800 1,000,000 30,000 20 10 1,500 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 burner size and solvent load present.
  • Explosion relief of adequate area determined by oven or furnace workspace volume.

Industry Standards