Furnace Manufacturing Division 1371 Speers Road, OakvilleOntario, Canada L6L 2X5Tel: 905-827-4171 / Fax: 905-825-7489 The key benefits of this system are:
VAV Series Furnace Specs - 40989 Vacuum Gas Quench Furnaces
www.vacaero.com
VACUUM FURNACE SPECIFICATION
FURNACE CHAMBER CONTROLS: The chamber and heads are a double-wall water-cooled design, primed and painted the customers choice of colour. The chamber is equipped with all necessary thermocouple acks, gauge ports, pumping ports and gas quench entries conveniently located for easy access. The tank assembly is vertically aligned with a bottom opening load head. The bottom head and the load are raised and lowered smoothly by a constant speed, ball screw driven lifting ack. Once lowered, the bottom head rolls out from beneath the
furnace by means of a powered drive assembly to allow 0° access to the load. The tank is equipped with a powered rotary clamping system to secure the bottom head during processing. A ground fault system is used to detect if the load or fixtures touch the heating elements during loading or unloading and will stop the elevator to prevent damage.
rocess Control ith SCAA:
The VAC AERO control system is programmable and logic based. The design philosophy of VAC AERO is to simplify control by using the program capabilities to perform as many functions as possible, thereby reducing operator dependence. VAC AERO has also chosen proven hardware components, suitably hardened for an industrial shop environment. The system uses a state-of-the-art hybrid controller to control the machine functions and
furnace temperature. The controller integrates with software running on a personal computer to provide Supervisory Control and Data Acquisition SCADA. Operator interface is provided though an LCD touch-screen mounted in a control panel. An extensive range of standard displays is available. ertemperature Saet Controller: Digital manual set 0°F - 100°F, Type S. VACUUM PUMPING SYSTEM: Vacuum nstrumentation: oer Suppl: Compatible with plant wide SCADA and network integration. The heating element power is supplied by an A.C. water cooled power supply containing single phase VRT assemblies. Each VRT has a 0 100 trim control for optimum temperature uniformity in the hot zone. The vacuum pumpdown is automatic and interlocked. The VAC AERO design uses a holding pump to maintain a low pressure on the diffusion pump foreline at all times. This feature, combined with proper timed sequencing of vacuum valves, virtually eliminates backstreaming of pump oils. A Vacuum Gauge Controller with 2 station, thermocouple gauge and 1 station Penning cold cathode gauge is used to monitor the chamber and the pumping system. This instrument is integrated with the process controller to provide dedicated setpoints that control all critical vacuum-related process functions. Process cycle validation. Mechanical ump: Roughing Pump and Booster combination appropriately sized for
furnace volume. Extensive alarm and event management and reporting. Temperature control using advanced algorithms, auto tuning, and multiple PID loops. Holding ump: iusion ump: Rotary vane pump. Varian series complete with charge of Dow Corning fluid. Main Roughing and Foreline Vales: Right angle poppet valve with electro-pneumatic operation. Operator sign-onsign-off security provides up to 255 control levels to limit operator control of individual items of plant and equipment. artial ressure Capabilities: The
furnace can be operated at partial pressures up to 1 torr 1000 microns of inert gas argon or nitrogen, whichever is used for quenching. Failsafe hydrogen partial pressure systems are also available. Enhanced maintenance and troubleshooting management and trending. GAS QUENCH SYSTEM: External recirculating inert gas quenching system distributes quench gas through circumferentially located internal nozzles for rapid, uniform cooling of the work load. The system includes: uench blower powered by electric motor with soft start. Special high efficiency tubefin heat exchanger. Complete quench piping. The system is shipped complete, tested and ready for installation. VAC AERO offers installation supervision or complete installation services. After installation, a qualified VAC AERO technician will visit the site to commission the equipment and provide instruction in
furnace operation. As part of every
furnace contract, VAC AERO also provides pre-delivery training in heat treating processes
furnace operation and maintenance. INSTALLATION AND START UP ASSISTANCE: Selectable operating pressure. Please see IG Series Quench Gas Storage Systems for details. FURNACE COOLING SYSTEM: Furnace water system consists of a compact manifold containing all necessary pressure regulators, valves, pressure switches and flow regulators with supply and drain hoses and fittings. Please see Dual Loop Furnace Cooling system for additional details.
