AUTOMATIC PROCESS CONTROL (APC)
US PATENT (5,189,963)
APC is the ultimate in control systems for a burn-off oven. The purpose of the control system is to provide the quickest cleaning cycle time while protecting the product, operator and the workplace The ARC system automati-cally adjusts the required cycle time to the weight of the load and the amount of combustible material on the parts: thus, ARC provides the shortest possible cycle time for the load being processed. There is no under or over processing with the APC. The control system requires zero input from the operator. Digital temperature control-lers are programmed to respond to the rale of temperature change in both the over and the afterburner: rapid temperature changes are caused by exotherms and excessive combustible vapor levels. The controllers activate primary water sprays to control the process at a safe rate. Large backup sprays are activated within seconds if the primary sprays are not adequate. In the event that primary and backup water sprays are not able to control a rapid temperature rise, the oven burner will shut down. the afterburner will stay on, and the water sprays will continue to operate. If there is an afterburner failure, or if there is a momentary power failure, then water sprays are also activated to cool the oven down. This will prevent smoke emissions from the stack. For better tempera-ture control, the ARC fires the burners high and low instead of On and Off. The frequency of lighting failures and wear on the burners will be reduced. The APC will not allow the oven to turn off while any combustible materials remain in the oven, The APC will turn the oven off automatically when the load is complete. The ARC is a significant improvement over cycle time control or ramp & soak control.
UNIQUE TOP-DOWN HEATING DESIGN
US PATENT (5,351.632)
Top / Down Heating is a unique patented exterior multi-chamber design in which the oven is heated from the top to the bottom. The primary (oven) burner releases heat in the top of the oven and the afterburner removes cool air and combustible products from the bottom. The positioning of the burners is the reverse of other burn-off ovens.
|NFPA / FM / UL STANDARDS||The Steelman burn-off oven is built to the standards of the National Fire Protection Association (NFPA) where applicable and Factory Mutual Insurance (FM). Other standards by Industrial Risk Insurers (III), Canadian Gas Association (CGA), etc., can be substituted at small charge (contact factory). Consult the factory for the respective standard. The NFPA & FM standards include such features as a high/low gas pressure switch, purge timer, door switch, main safety shutoff valves for ovens over 400,000 BTLJIHr, and others. Our control panels are UL listed.|
|INDUSTRIAL QUALITY CAST IRON BURNERS|
Also, unlike other burn-off oven manufacturers, Steelman uses industrial quality cast iron burners. These burners are built to significantly greater durability and reliability standards than the light duty sheet metal burners used by other manufacturers. Also, these industrial quality heavy duty burners are available with inputs exceeding 1 million BTU/Hr.
|HIGH FIRE AFTERBURNER|
A high fire afterburner is included standard with every oven, allowing the afterburner to rapidly heat up and maintain a minimum of 1,500″F during operation. This assures that the afterburner will always be ready to process vapors produced in the oven. Other systems that don’t incorporate a high fire burner may emit smoke and odor while the afterburner is heating up. This benefit also allows the oven to process at a maximum rate. The system is deactivated above 1500uF in order to conserve energy.
|CONSTRUCTION SECOND TO NONE||All Steelman burn-off ovens undergo the same meticulous fabrication. The construction starts with an angle iron frame and a 14 gauge CRS exterior. The floor is built out of 4″ channel and insulated with 1/2″ ceramic fiber and 3 1/2″ of refractory cement. The oven includes a five layer protection system in the walls & ceiling: two layers protect against corrosion, two layers insulate, and the aluminized perforated steel covers the entire interior eliminating mechanical damage. A pressure relief hatch is located on the top of the oven to prevent operators from being harmed in the event of an ignition. The afterburner chamber and exhaust stack are constructed of stainless steel and lined with a 1/2″ ceramic sleeve and a 1 1/2″ ceramic blanket. Finally, Steelman burn-off ovens include an exclusive ergonomically designed track system. A short section of track is allowed to fold on its side in order that the oven doors can be opened and closed over the track.|
|EXHAUST INSTALLATION INCLUDED||Exhaust kits include 14 linear feel of exhaust stack over the top of the oven. Also included are rain cap and flashing. Stack lengths are constructed of stainless steel and lined with ceramic fiber, Additional stack lengths, elbows. dampers and other accessories are available from the factory.|
|POWERED CART MOVER||Motorizes loading & unloading. Prevents operator injuries.|
|IRI or CGA OR SPECIAL CONTROLS||IRI or CGA Specifications and/or other special requirements.|
|HEAVY DUTY BASKETS||Heavy duty baskets for small parts & fork lift loading.|
|EXHAUST PARTS||Extra stack length, elbows, etc. Also stack dampers available.|
|AUTOMATIC DOOR LOCKS||Prevents oven from being opened during processing.|
|CONTROLS LOCATION||Controls can be located remote or opposite side of oven.|
|BATTERY BACKUP WATER SPRAY||Battery backup water sprays cool down load if power loss occurs.|
|START-UP SUPERVISION SERVICE||Supervision of installation startup and/or operator and maintenance training.|