Model: EWT03ED – 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
EWT03ED-48-48-60
74 59 89 34″ 48 48 60 80 36 1,700 1 21.25 N/A N/A 0 Yes
EWT03ED-48-48-72
76 59 102 34″ 48 48 72 96 36 2,000 1 1/2 20.83 N/A N/A 0 Yes
EWT03ED-48-48-96
76 59 126 34″ 48 48 96 128 45 2,500 2 19.53 N/A N/A 0 Yes
EWT03ED-60-60-60
88 71 90 40″ 60 60 60 125 45 2,500 2 20.00 N/A N/A 0 Yes
EWT03ED-60-60-72 88 71 107 40″ 60 60 72 150 45 3,000 2 20.00 N/A N/A 0 Yes
EWT03ED-60-60-96 90 71 138 40″ 60 60 96 200 45 4,000 3 20.00 N/A N/A 0 Yes
EWT03ED-72-72-72
102 83 114 46″ 72 72 72 216 45 4,000 3 18.52 N/A N/A 0 Yes
EWT03ED-72-72-96 104 83 146 46″ 72 72 96 288 54 5,500 3 19.09 N/A N/A 0 No
EWT03ED-72-120-96
110 131 149 46″ 72 120 96 480 72 9,000 7 1/2 18.75 N/A N/A 0 No
EWT03ED-84-84-84 118 95 135 52″ 84 84 84 343 63 7,000 5 20.41 N/A N/A 0 Yes
EWT03ED-84-96-84 120 107 136 52″ 84 96 84 392 63 8,000 5 20.41 N/A N/A 0 Yes
EWT03ED-84-120-84
122 131 141 52″ 84 120 84 490 72 10,000 7 1/2 20.41 N/A N/A 0 Yes
EWT03ED-84-120-96
124 131 159 52″ 84 120 96 560 72 12,000 7 1/2 21.43 N/A N/A 0 No
EWT03ED-96-96-96 134 107 153 58″ 96 96 96 512 72 10,000 7 1/2 19.53 N/A N/A 0 No
EWT03ED-96-120-96
136 131 159 58″ 96 120 96 640 81 12,000 7 1/2 18.75 N/A N/A 0 No
EWT03ED-96-144-96
140 155 166 58″ 96 144 96 768 90 16,000 10 20.83 N/A N/A 0 No
EWT03ED-96-168-96
142 179 167 58″ 96 168 96 896 99 18,000 15 20.89 N/A N/A 0 No
EWT03ED-96-192-96
144 203 174 58″ 96 192 96 1,024 108 20,000 15 19.53 N/A N/A 0 No
EWT03ED-96-240-96
146 251 180 58″ 96 240 96 1,280 117 24,000 15 18.75 N/A N/A 0 No
EWT03ED-96-240-120
150 251 136 58″ 96 240 120 1,600 153 30,000 20 18.75 N/A N/A 0 Yes
EWT03ED-96-288-96
150 299 189 58″ 96 288 96 1,536 153 30,000 20 19.53 N/A N/A 0 No
EWT03ED-96-288-120
158 299 225 58″ 96 288 120 1,920 171 40,000 20 20.83 N/A N/A 0 No
EWT03ED-96-336-96
158 347 201 58″ 96 336 96 1,792 171 40,000 20 22.32 N/A N/A 0 No
EWT03ED-96-336-120
158 347 225 58″ 96 336 120 2,240 189 40,000 20 17.86 N/A N/A 0 No
EWT03ED-120-120-96
164 131 166 70″ 120 120 96 800 90 16,000 10 20.00 N/A N/A 0 No
EWT03ED-120-120-120
168 131 198 70″ 120 120 120 1,000 99 20,000 15 20.00 N/A N/A 0 No
EWT03ED-120-144-96
166 155 167 70″ 120 144 96 960 99 18,000 15 18.75 N/A N/A 0 No
EWT03ED-120-144-120
170 155 204 70″ 120 144 120 1,200 108 24,000 15 20.00 N/A N/A 0 No
EWT03ED-120-168-96
168 179 179 70″ 120 168 96 1,120 108 22,000 15 19.64 N/A N/A 0 No
EWT03ED-120-168-120
172 179 205 70″ 120 168 120 1,400 117 26,000 15 18.57 N/A N/A 0 No
EWT03ED-120-192-96
170 203 180 70″ 120 192 96 1,280 117 24,000 15 18.75 N/A N/A 0 No
EWT03ED-120-192-120
174 203 213 70″ 120 192 120 1,600 153 30,000 20 18.75 N/A N/A 0 No
EWT03ED-120-240-96
174 251 189 70″ 120 240 96 1,600 153 30,000 20 18.75 N/A N/A 0 No
EWT03ED-120-240-120
182 251 225 70″ 120 240 120 2,000 171 40,000 20 20.00 N/A N/A 0 No
EWT03ED-120-288-96
182 299 201 70″ 120 288 96 1,920 171 40,000 20 20.83 N/A N/A 0 No
EWT03ED-120-288-120
188 299 237 70″ 120 288 120 2,400 189 50,000 20 20.83 N/A N/A 0 No
EWT03ED-120-336-96
182 347 201 70″ 120 336 96 2,240 189 40,000 20 17.86 N/A N/A 0 No
EWT03ED-120-336-120
188 347 237 70″ 120 336 120 2,800 207 50,000 20 17.86 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
EWT03ED-48-48-60
74 59 116 34″ 48 48 60 80 36 1,700 1 21.25 62 1/4 0.06 Yes
EWT03ED-48-48-72
76 59 129 34″ 48 48 72 96 45 2,000 1 1/2 20.83 62 1/4 0.06 Yes
EWT03ED-48-48-96
76 59 153 34″ 48 48 96 128 45 2,500 2 19.53 62 1/4 0.06 No
EWT03ED-60-60-60
88 71 117 40″ 60 60 60 125 45 2,500 2 20.00 62 1/4 0.06 Yes
EWT03ED-60-60-72 88 71 134 40″ 60 60 72 150 45 3,000 2 20.00 62 1/4 0.06 Yes
EWT03ED-60-60-96 90 71 165 40″ 60 60 96 200 54 4,000 3 20.00 62 1/4 0.06 No
EWT03ED-72-72-72
102 83 141 46″ 72 72 72 216 54 4,000 3 18.52 62 1/4 0.06 Yes
EWT03ED-72-72-96 104 83 173 46″ 72 72 96 288 63 5,500 3 19.09 62 1/4 0.06 No
EWT03ED-72-120-96
110 131 176 46″ 72 120 96 480 72 9,000 7 1/2 18.75 100 1/4 0.10 No
EWT03ED-84-84-84 118 95 162 52″ 84 84 84 343 63 7,000 5 20.41 100 1/4 0.10 No
EWT03ED-84-96-84 120 107 163 52″ 84 96 84 392 72 8,000 5 20.41 100 1/4 0.10 No
EWT03ED-84-120-84
122 131 168 52″ 84 120 84 490 90 10,000 7 1/2 20.41 250 1/4 0.25 No
EWT03ED-84-120-96
124 131 186 52″ 84 120 96 560 90 12,000 7 1/2 21.43 250 1/4 0.25 No
EWT03ED-96-96-96 134 107 180 58″ 96 96 96 512 90 10,000 7 1/2 19.53 250 1/4 0.25 No
EWT03ED-96-120-96
136 131 186 58″ 96 120 96 640 99 12,000 7 1/2 18.75 250 1/4 0.25 No
EWT03ED-96-144-96
140 155 193 58″ 96 144 96 768 99 16,000 10 20.83 250 1/4 0.25 No
EWT03ED-120-120-96
164 131 193 70″ 120 120 96 800 108 16,000 10 20.00 250 1/4 0.25 No
EWT03ED-120-120-120
168 131 225 70″ 120 120 120 1,000 117 20,000 15 20.00 250 1/4 0.25 No
EWT03ED-120-144-96
166 155 194 70″ 120 144 96 960 117 18,000 15 18.75 250 1/4 0.25 No
EWT03ED-120-144-120
170 155 161 70″ 120 144 120 1,200 144 24,000 15 20.00 250 1/4 0.25 No
EWT03ED-120-168-96
168 179 206 70″ 120 168 96 1,120 144 22,000 15 19.64 250 1/4 0.25 No
EWT03ED-120-168-120
172 179 232 70″ 120 168 120 1,400 171 26,000 15 18.57 750 1 0.51 No
EWT03ED-120-192-96
170 203 207 70″ 120 192 96 1,280 162 24,000 15 18.75 750 1 0.51 No
EWT03ED-120-192-120
174 203 240 70″ 120 192 120 1,600 198 30,000 20 18.75 1,000 1 1/2 0.77 No
EWT03ED-120-240-96
174 251 216 70″ 120 240 96 1,600 198 30,000 20 18.75 1,000 1 1/2 0.77 No
EWT03ED-120-240-120
182 251 252 70″ 120 240 120 2,000 225 40,000 20 20.00 1,000 1 1/2 0.77 No
EWT03ED-120-288-96
182 299 228 70″ 120 288 96 1,920 225 40,000 20 20.83 1,000 1 1/2 0.77 No
EWT03ED-120-288-120
188 299 264 70″ 120 288 120 2,400 234 50,000 20 20.83 1,000 1 1/2 0.77 No
EWT03ED-120-336-96
182 347 228 70″ 120 336 96 2,240 234 40,000 20 17.86 1,000 1 1/2 0.77 No
EWT03ED-120-336-120
188 347 264 70″ 120 336 120 2,800 261 50,000 20 17.86 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