In need of a custom oven? Look no further, LEWCO has you covered! LEWCO is capable of designing and manufacturing industrial ovens to meet unique, customer-specific application requirements. Recently, LEWCO delivered an enhanced-duty walk-in oven to a manufacturer in the defense industry. The electrically heated oven, which is rated for a maximum temperature of 350°F., is used for pre-heating various parts to 165°F.
The oven is supplied with a top mounted heater-box. A high-efficiency circulation fan delivers dual airflow evenly throughout the workspace. An exhaust fan is included with the capability of running at variable speeds to permit faster cool downs. With installation being in an electrically classified area and the nature of the customer’s products, the oven is fabricated with 3/16” plate construction to meet NFPA 86 explosion resistant standards. All electrical and controls are explosion proof design. The air inside the oven is filtered to ensure no combustible materials get pulled into the heaters. The filters are washable and are easily accessible from the oven workspace. A differential pressure gauge was included so operators can monitor when the filters need cleaned. As an additional safety feature both the circulating and exhaust fans are AMCA “C” spark resistant construction.
Oven controls include a Watlow F4T temperature controller and redundant high-limit controller providing precise temperature control and over-temperature protection. This controller has a multitude of capabilities such as ramp/ soak programming, data logging, and Ethernet communications. The control enclosure is NEMA 4 with a continuous air purge system to maintain positive internal pressure and comply with the hazardous area requirements. The air purge system is interlocked with the main control panel and will disconnect if there is a loss of air pressure.