Gas Forehearth Colorant F/H IR Thermometer Level Control M.H.E. Thermocouple VSF Cooling Where Installed World-Wide

Electric Forehearth Summary of the Benefits: Substantial energy savings provide rapid payback on installation costs Operational flexibility over a wide range of tonnage pulls Improved glass temperature homogeneity provides better glass distribution in the final product Fast response to changes in the temperature of incoming glass Excellent temperature stability Simple to operate minimum set up and maintenance Simple, rapid installation due to monobloc construction Roof blocks can be re-used for a second campaign, minimising rebuild costs Extended heating element life Standard roof blocks can be used in the event of gas conversion No auxiliary heating required for start-up or after power failure Design Features Monobloc roof construction Graded Insulation Longitudinal cooling Advanced heating element design Automatic control of heating and cooling functions The technological innovations and operating benefits of the BH-F 400 Series forehearth, proven on over seven hundred lines around the world, are also incorporated into the E400 Series Electric forehearth. This means that the advantages of BH-F’s direct centre line cooling, monobloc roof contruction, and energy-efficient operation can still be obtained, even in those parts of the world where gas or oil fuel is unavailable or uneconomical. The use of high-grade insulation in the side walls of the superstructure minimises energy consumption and the monobloc roof allows better insulation than multi-block roof designs, especially those with side cooling cavities. Longitudinal cooling offers heat removal at high tonnages while providing a high level of insulation with low energy input at low tonnages. This means that the E400 Series forehearth offers maximum performance over a wide range of pulls. Improved temperature homogeneity is achieved with longitudinal cooling, because it acts on the hot centre stream of glass. Side-fed cooling systems result in uneven glass temperatures which can lead to gob and machine loading difficulties. Because there is a single air entry point in each zone, the amount of central cooling air can be automatically controlled. The controller can be set to switch between heating and cooling modes without the need for operator intervention. The separation of hot and cold air optimises heating and cooling functions. Also, the minimum amount of cooling air is required. Apart from the single air entry point and single damper block, each forehearth zone is completely sealed. This allows good control over internal pressure in each zone. The monobloc roof is simple to construct and the roof blocks can be removed and re-used when the line is rebuilt. This provides significant cost savings on forehearth rebuild and channel block replacement. Heating elements are zoned with -hot- sections at the sides and mechanically stronger -cold- sections in the centre. This arrangement extends element life and facilitates automatic control of heating and cooling. Safety cut-outs (interlocks) on all electrical connections to the heating elements protect operators and plant personnel. State of the art thyristors are employed to control the electrical power supplies. Modern digital controllers are used to control the glass temperature within each zone of the forehearth. This ensures the highest possible degree of temperature homogeneity to give optimum glass condition. The Options The 400 Series Electric Forehearth can be designed and constructed to suit most furnace and drop point layouts. And with BH-F’s automatic temperature control systems, the forehearth can be easily adapted to take full advantage of its superior control, whilst minimising operator involvement. The Backup BH-F’s advanced computer aided design facilities enable us to make fast and accurate proposals covering all aspects of the glass manufacturing process, from throat to forming machine. Our design teams ensure that customers get the equipment and materials which best suit their own particular production requirements, with swift and precise assessment of performance. In the field, our engineers operate worldwide to install and commission equipment, earning a reputation both for technological expertise and for service. BH-F encourages customers to arrange follow-up visits after a period of operation to ensure installations are performing to the high standards demanded of all BH-F equipment. A training engineer is available to train your operators in all aspects of working end set up, operation and maintenance. With our track record of technical innovation, expert consultancy and technical support, BH-F provides a unique level of service to glass. Home | Site Map | products | Sales | Technical | News | Library | Links | Legal