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LEWCO Inc.
INDUSTRIAL OVENS

 

EWT03ED - Walk-In Oven 

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 EWT series features a top mounted heater box, which creates a smaller foot print and permits pass-through processing. 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. 

  • Cost-Effective
  • Dependable
  • Energy Efficient
  • Quality Built
  • Safe Operation
ISO 9001:2008 Registered Company

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 PatternDual Airflow Diagram Product Page

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:Controls for Product Page

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.

Zero Speed Switch for Fans

Minimizes nuisance tripping associated with standard air flow switch(es).

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 DimensionsDoor Swing RadiusWorkspace DimensionsWorkspace Volume (cubic ft.)Heater Bank
(kW)
Circulating Fan
(CFM)
Motor
(HP)
Air Changes per MinuteExhaust Fan Capacity (CFM)Exhaust Motor (HP)Solvents per Batch
(Gals.)
Ships Fully Assembled
"W"D"H"W"D"H
EWT03ED-48-48-60
74598934"4848608036 1,700 121.25N/AN/A0Yes
EWT03ED-48-48-72
765910234"4848729636 2,000 1 1/220.83N/AN/A0Yes
EWT03ED-48-48-96
765912634"48489612845 2,500 219.53N/AN/A0Yes
EWT03ED-60-60-60
88719040"60606012545 2,500 220.00N/AN/A0Yes
EWT03ED-60-60-72887110740"60607215045 3,000 220.00N/AN/A0Yes
EWT03ED-60-60-96907113840"60609620045 4,000 320.00N/AN/A0Yes
EWT03ED-72-72-72
1028311446"72727221645 4,000 318.52N/AN/A0Yes
EWT03ED-72-72-961048314646"72729628854 5,500 319.09N/AN/A0No
EWT03ED-72-120-96
11013114946"721209648072 9,000 7 1/218.75N/AN/A0No
EWT03ED-84-84-841189513552"84848434363 7,000 520.41N/AN/A0Yes
EWT03ED-84-96-8412010713652"84968439263 8,000 520.41N/AN/A0Yes
EWT03ED-84-120-84
12213114152"841208449072 10,000 7 1/220.41N/AN/A0Yes
EWT03ED-84-120-96
12413115952"841209656072 12,000 7 1/221.43N/AN/A0No
EWT03ED-96-96-9613410715358"96969651272 10,000 7 1/219.53N/AN/A0No
EWT03ED-96-120-96
13613115958"961209664081 12,000 7 1/218.75N/AN/A0No
EWT03ED-96-144-96
14015516658"961449676890 16,000 1020.83N/AN/A0No
EWT03ED-96-168-96
14217916758"961689689699 18,000 1520.89N/AN/A0No
EWT03ED-96-192-96
14420317458"96192961,024108 20,000 1519.53N/AN/A0No
EWT03ED-96-240-96
14625118058"96240961,280117 24,000 1518.75N/AN/A0No
EWT03ED-96-240-120
15025113658"962401201,600153 30,000 2018.75N/AN/A0Yes
EWT03ED-96-288-96
15029918958"96288961,536153 30,000 2019.53N/AN/A0No
EWT03ED-96-288-120
15829922558"962881201,920171 40,000 2020.83N/AN/A0No
EWT03ED-96-336-96
15834720158"96336961,792171 40,000 2022.32N/AN/A0No
EWT03ED-96-336-120
15834722558"963361202,240189 40,000 2017.86N/AN/A0No
EWT03ED-120-120-96
16413116670"1201209680090 16,000 1020.00N/AN/A0No
EWT03ED-120-120-120
16813119870"1201201201,00099 20,000 1520.00N/AN/A0No
EWT03ED-120-144-96
16615516770"1201449696099 18,000 1518.75N/AN/A0No
EWT03ED-120-144-120
17015520470"1201441201,200108 24,000 1520.00N/AN/A0No
EWT03ED-120-168-96
16817917970"120168961,120108 22,000 1519.64N/AN/A0No
EWT03ED-120-168-120
17217920570"1201681201,400117 26,000 1518.57N/AN/A0No
EWT03ED-120-192-96
17020318070"120192961,280117 24,000 1518.75N/AN/A0No
EWT03ED-120-192-120
17420321370"1201921201,600153 30,000 2018.75N/AN/A0No
EWT03ED-120-240-96
17425118970"120240961,600153 30,000 2018.75N/AN/A0No
EWT03ED-120-240-120
18225122570"1202401202,000171 40,000 2020.00N/AN/A0No
EWT03ED-120-288-96
18229920170"120288961,920171 40,000 2020.83N/AN/A0No
EWT03ED-120-288-120
18829923770"1202881202,400189 50,000 2020.83N/AN/A0No
EWT03ED-120-336-96
18234720170"120336962,240189 40,000 2017.86N/AN/A0No
EWT03ED-120-336-120
18834723770"1203361202,800207 50,000 2017.86N/AN/A0No
Model (NFPA Class A)Overall DimensionsDoor Swing RadiusWorkspace DimensionsWorkspace Volume (cubic ft.)Heater Bank
(kW)
Circulating Fan
(CFM)
Motor
(HP)
Air Changes per MinuteExhaust Fan Capacity (CFM)Exhaust Motor (HP)Solvents per Batch
(Gals.)
Ships Fully Assembled
"W"D"H"W"D"H
EWT03ED-48-48-60
745911634"4848608036 1,700 121.25621/40.06Yes
EWT03ED-48-48-72
765912934"4848729645 2,000 1 1/220.83621/40.06Yes
EWT03ED-48-48-96
765915334"48489612845 2,500 219.53621/40.06No
EWT03ED-60-60-60
887111740"60606012545 2,500 220.00621/40.06Yes
EWT03ED-60-60-72887113440"60607215045 3,000 220.00621/40.06Yes
EWT03ED-60-60-96907116540"60609620054 4,000 320.00621/40.06No
EWT03ED-72-72-72
1028314146"72727221654 4,000 318.52621/40.06Yes
EWT03ED-72-72-961048317346"72729628863 5,500 319.09621/40.06No
EWT03ED-72-120-96
11013117646"721209648072 9,000 7 1/218.751001/40.10No
EWT03ED-84-84-841189516252"84848434363 7,000 520.411001/40.10No
EWT03ED-84-96-8412010716352"84968439272 8,000 520.411001/40.10No
EWT03ED-84-120-84
12213116852"841208449090 10,000 7 1/220.412501/40.25No
EWT03ED-84-120-96
12413118652"841209656090 12,000 7 1/221.432501/40.25No
EWT03ED-96-96-9613410718058"96969651290 10,000 7 1/219.532501/40.25No
EWT03ED-96-120-96
13613118658"961209664099 12,000 7 1/218.752501/40.25No
EWT03ED-96-144-96
14015519358"961449676899 16,000 1020.832501/40.25No
EWT03ED-120-120-96
16413119370"12012096800108 16,000 1020.002501/40.25No
EWT03ED-120-120-120
16813122570"1201201201,000117 20,000 1520.002501/40.25No
EWT03ED-120-144-96
16615519470"12014496960117 18,000 1518.752501/40.25No
EWT03ED-120-144-120
17015516170"1201441201,200144 24,000 1520.002501/40.25No
EWT03ED-120-168-96
16817920670"120168961,120144 22,000 1519.642501/40.25No
EWT03ED-120-168-120
17217923270"1201681201,400171 26,000 1518.5775010.51No
EWT03ED-120-192-96
17020320770"120192961,280162 24,000 1518.7575010.51No
EWT03ED-120-192-120
17420324070"1201921201,600198 30,000 2018.751,0001 1/20.77No
EWT03ED-120-240-96
17425121670"120240961,600198 30,000 2018.751,0001 1/20.77No
EWT03ED-120-240-120
18225125270"1202401202,000225 40,000 2020.001,0001 1/20.77No
EWT03ED-120-288-96
18229922870"120288961,920225 40,000 2020.831,0001 1/20.77No
EWT03ED-120-288-120
18829926470"1202881202,400234 50,000 2020.831,0001 1/20.77No
EWT03ED-120-336-96
18234722870"120336962,240234 40,000 2017.861,0001 1/20.77No
EWT03ED-120-336-120
18834726470"1203361202,800261 50,000 2017.861,0001 1/20.77No

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.Door N Floor 3

     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 Industry Standards Logos For Web 2