support@electroglass.com
100-Pound Furnace: 42w x 44d x 60h /1900
150 and 225-Pound Furnaces: 42w x 44d x 60h / 2000-2200
325 and 425-Pound Furnaces: 44w x 54d x 63h / 3000-3500
STANDARD: 208-240 Volts - Single Phase AC, 50/60Hz
OPTIONAL: Three Phase
- POWER: Phase angle controlled. When elements are new, voltage will be lower, and amps will be higher.
100-Pound Furnace: 9.6 kw (65 Ampes max.)
150-Pound Furnace: 11.2 kw (65 Amps max.)
225-Pound Furnace: 13 kw (90 Amps max.)
325-Pound Furnace: 23 kw (95 Amps max.)
Electroglass® elements are high density, reaction bonded silicon carbide Starbars®, manufactured to our exacting specifications. Most soda lime glass batches have no effect on the elements. The New Electroglass® glass pellets, EG-90 and EG-96, are available from East Bay Batch Co. (510-233-0708). This is a bright soda lime barium crystal, specially designed for Electroglass® furnaces and Kugler and Gaffer Batch color rods.Life expectancy of the heating elements with soda lime batch is up to 2 years in the 2-element furnaces, and up to 4 years in the 3-element furnaces.
Elements are positioned horizontally, safely out of the way, above the gathering port. Electrical connections for the elements are on the back of the furnace. The element safety cover box comes pre-wired to the furnace control panel. Hooking up elements is as simple as sliding the element into the sleeve, dropping the connectors over two 3/8-inch bolts, and tightening the nuts. Replacing an element is an easy 10-minute task; there is no downtime. A cold element is inserted directly into a hot furnace. Elements do not thermal shock; in fact, they become stronger at higher temperatures.
Each element is controlled by it's own phase-angle fired SCR Power Controller. Should one element fail, the remaining element(s) will keep the furnace operating. Manual controls allow each element to be tuned for maximum life. Voltage and current are automatically varied to provide the most economical, minimum power usage for optimum efficiency. Compensation in voltage for the change in resistance with age of the heating elements is automatic.
Honeywell UDC 3300 Digital Controller with ramp and soak programming for running fining profiles. Thermocouple is R-type platinum - 13% Rhodium with quick disconnect cable.
Thermocouple Failure Protection: Automatic switch over to fail safe, idle power.
OPTIONAL: Temperature Chart Recorder and Computer Interface.
A fail safe sensor detects door position , and turns the power off to the elements when the door is open.
The tank is a rectangular shape with rounded inside bottom and corners optimized to prevent thermal cords. The tank and superstructure are cast and fired in one of many available compositions at the Emhart Glass ,Laclede Christy plant. Normal life expectancy of the glass tank is two to three years on soda lime glass. Soda lime glass has no effect on the superstructure. Unlike in a gas-fired furnace, in an electric furnace glass vapor does not exist, so it cannot coat the superstructure or crown.
Tanks are invested in the 650 - 1000 furnaces.
STANDARD: Seamless 10½ x 10½ arch-shaped top, vertical sides, and flat bottom that slopes toward the glass. Glass can not run out and stick the door. The Gathering Port is made of fused silica, and will not crack. Four to six years life expectancy is normal with soda lime glasses.OPTIONAL: A larger Gathering Port is available for the 650 through 1000-pound furnaces. Custom sizes and shapes can be made to order.
The Top Arch Block through which the Gathering Port is inserted is made of fused silica, and holds up well to glass attack from soda lime batch. Life expectancy is six years or more with Electroglass® pellets. It will be less with more corrosive glasses. The Bottom Port Support Block is also made of fused silica.
The door opens horizontally on three, stainless steel, precision glide rails. The door carriage is magnetically coupled to a pneumatic piston that travels inside of the center glide rail. A foot pedal air valve controls the door position. The door can be opened to any position where it will remain until the operator steps on the pedal again. Then it can be either opened further or closed. The speed is adjustable. The furnaces come pre-plumbed with high temperature stainless steel air hoses and regulator. A single 100 psi air supply line is required.
The door, which is an insulated stainless steel box is protected by the Door Liner Tile. It is made of fused quartz, and is designed to withstand extreme and sudden temperature changes, as well as glass attack. Life expectancy with soda lime glass is up to four or more years. The door can not stick.
State-of-the-art ceramic fiber and board combinations of various densities are used to achieve a remarkably superior insulating value. The furnace sides, back, and top are made from a structural material, 1 inch of which is equivalent in insulating value to multiple inches of ceramic blanket. When the inside of the furnace is 2200°F, the outside is only 112°F.
The base and frame is welded from 3/16-inch standard structural steel, and is on casters so that it can be moved. The upper frame corners are held together with ¾-inch threaded rod, which allows easy adjustment for minor expansion and contraction after initial heat up. This modular design facilitates ease of construction, which usually takes about one day. The furnaces come apart easily and quickly when it is necessary to replace the crucible.
On-site supervision of assembly, and startup service is available. The cost is as follows:Most places in North America: $3000
Asia, Europe, and South America: $6000
Three-year, extendible Warranty on electronics. All other parts are covered for defects in manufacturing, but not for breakage, normal wear, or glass attack.
DESIGN AND SPECIFICATIONS ARE SUBJECT TO MODIFICATION WITHOUT NOTICE
Electroglass®
P.O. Box 908, Portage, MI 49081
Telephone and Fax: (269) 668-2855
