the presence of a ring heater around the equatorial plane is simulated by heating one of the two supporting disks with respect to the other, whereas heat flow is neglected through the free surface.
Single-heat rings have two terminals for single wattage, ON-OFF switch or thermostat.
Three-heat rings have three terminals which split the total rated wattage into two equal circuits. By using a three-heat switch 1/4, 1/2 or full wattage may be obtained. Use the two equal circuits in parallel to obtain full wattage. Center terminal is common.
Refractory-insulated construction exclusively. By far the most rugged and best for long, dependable service.
Easy installation. The circular shape and the use of OMEGALUX™ utility clamps simplifies the use of ring heaters. Nesting rings to pack heat in a small area can be done by installing rings within each other. For examples: A-651, A-802 and A-903 provide 4050 watts within a 10 31/32" circle.
Utility clamps. Usually used in sets of 4 to clamp ring elements on flat surfaces. 5/16" flat-head machine screws are normally used, with head brazed or welded to work surface.
