LEWCO, Inc. recently delivered a conveyor oven to a well-known manufacturer of plumbing systems. The oven is rated for a maximum operating temperature of 500°F. and will be used to dry cast iron cores at 400°F.
The oven features a single, direct-fired, natural gas heater box with a capacity of 700,000 BTU’s/Hr. The oven employs a 7,000 CFM circulation fan and a 750 CFM exhaust fan which include air proving circuits that are electrically interlocked with the heating system. The high-efficiency circulation fan and integral plenums deliver uniform “Vertical Down” airflow throughout the oven workspace. The customer requested a brass brush be attached to the stainless-steel wire mesh belt for cleaning. The oven is also supplied with two insulated bolt-on access panels for easy entry to the oven chamber for service and maintenance.
The oven controls include a Programmable Logic Controller (PLC) and touchscreen HMI, which incorporates temperature, safety, and motion abilities into a single operator interface. A Eurotherm 3216 temperature controller with a redundant high-limit controller provide precise temperature control and over-temperature protection.