The ERBT MK IV offers rugged construction combining a heavy
gauge carbon steel outer shell and a high insulating lining
package. The lining package is a multi component insulating
system that includes micr opor ous insulation . This material has
extr emely low thermal conductivity and has the effect of minimising
heat transfer through the furnace walls. The design and construction
of the ERBT MK IV allows excellent melting per formances
to be achieved at high power efficiencies from lightly loaded
elements. The ERBT MK IV comes with a well insulated swing
aside cover to reduce radiation losses fr om the surface of molten
metal. Lip axis pouring allows easy loading of transfer equipment
such as a Morgan HE Ladle. Hydraulic rams allow the pouring
rate to be easily controlled.
Radiation losses are minimised by use of a well insulated swing aside cover that can be sealed when no baling out is needed.
The melting system for the ERBT MK IV consists of 12 each Morgan
ER Panels arranged circular pattern to provide even thermal
transfer to the cr ucible wall. Mor gan ER Panels are made from top
quality element wir e on a high alumina substrate. Each panel
extends the full depth of the furnace chamber and is self supporting.
A ledge is provided at the top of the panel to protect the element
during crucible changing and to allow for easy replacement.
- Low Energy Costs
- Good Metal Temperature Control
- Very Low Casing Temperature
- Low Noise Level
- Low Holding Costs
- Simple Maintenance
Above data based on optimum foundry conditions. For normal foundry operations a performance of 90% of these ratings is typical.
- Circuit breaker for isolation and protection
- Earth leakage detection for operational safety and personnel protection
- Continuous individual element monitoring
- Chamber temperature control for element protection and regulation of power
- Metal temperature control by pyrometer and digital (proportional integral derivative) controller
- Furnace is depicted on a mimic diagram on the control cabinet. An LED illuminates when the respective panel is drawing the required current. The LEDs are of the ultra bright green type housed in chromed lensed holders to give optimum intensity.
This energy conservation feature enables a lower holding temperature to be automatically selected during periods of non use. A dedicated real-time/date clock can be programmed to select reduced temperature and to return to operational temperature when required. Similarly, the real-time clock can be programmed to start up and shut down the furnace at preset times and dates.
The electrical specification is to the highest available safety standards and includes earth leakage protection using residual current circuit breakers with 30mA sensitivity conforming with BSS4293. It is CE marked and conforms to EN746/1 and is CSA approved.
THERMOCOUPLE FAILURE PROTECTION
If the thermocouple sensor fails, this feature provides a programmed level of output power. Typically set to 10–30%, the time proportioning power control provides sufficient heat output power to maintain an aluminium charge within an acceptable temperature range.
IMPROVED TOP COVER INSULATION
The addition of a microporous insulation with exceptional insulating properties to the furnace cover reduces surface temperature, thereby improving working conditions, heat loss and safety.
The furnace is equipped with a "policeman" control. This feature is designed to prevent overheating of the furnace refractories and radiant panels, thus avoiding reduction of their lifespan.
A variety of metal temperature pyrometer can be specified. This includes floating or fixed immersion types and thermocouples housed within the crucible for holding applications.
Spilt metal detection, low metal temperature alarm, in-range indicating beacons, thyristor power control, metal temperature overshoot control and kilowatt hour meter.