Standard Equipment for all Models
  
  
PRODUCT IMAGE

Graphite heating chamber

PRODUCT IMAGE

Molybdenum heating chamber

PRODUCT IMAGE

Tungsten heating chamber

PRODUCT IMAGE

Ceramic fiber insulation

Basic version

  • Standard furnace sizes 8 - 500 liters
  • A water-cooled stainless steel process reactor sealed with temperature-resistant o-rings
  • Frame made of stable steel profiles, easy to service due to easily removable stainless steel panels
  • Housing of the VHT 8 model on castors for easy repositioning of furnace
  • Cooling water manifold with manual stopcocks in supply and return lines, automatic flowmeter monitoring, openloop cooling water system
  • Adjustable cooling water circuits with flowmeter and temperature indicator and overtemperature fuses
  • Switchgear and controller integrated in furnace housing
  • H 700 PLC control with clearly laid out 7“ touchpanel control for program entry and display, 10 programs each with 20 segments
  • Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2
  • Manual operation of the process gas and vacuum functions
  • Manual gas supply for one process gas (N2 or Ar) with adjustable flow
  • Bypass with manual valve for rapid filling or flooding of furnace chamber
  • Manual gas outlet with overflow valve (20 mbar relative)
  • Single-stage rotary vane pump with ball valve for pre-evacuating and heat treatment in a rough vacuum to 5 mbar
  • Pressure gauge for visual pressure monitoring
  • Defined application within the constraints of the operating instructions

Additional equipment

  • Tmax 2400  °C
  • Housing, optionally divisible, for passing through narrow door frames (VHT 08)
  • Manual gas supply for second process gas (N2 or Ar) with adjustable flow and bypass
  • Inner process box made of molybdenum, tungsten or CFC, especially recommended for debinding processes. The box is installed in the furnace with direct gas inlet and outlet and provides for better temperature uniformity. Due to a change in gas supply direction after debinding a clean process atmosphere for sintering is achieved.
  • Charge thermocouple with display
  • Temperature measurement at 2200  °C models with pyrometer and thermocouple, type S with automatic pull-out device for precise control results in the low temperature range (VHT 40 and larger)
  • Two-stage rotary vane pump with ball valve for pre-evacuating and heat-treating in a vacuum to 10-2 mbar
  • Turbo molecular pump with slide valve for pre-evacuation and for heat treatment in a vacuum to 10-5 mbar including electric pressure transducer and booster pump (only VHT…/MO)
  • Other vacuum pumps on request
  • Heat exchanger with closed-loop cooling water circuit
  • Automation package with graphic touch panel H 3700
    • 12" graphic touch panel H 3700
    • Input of all process data like temperatures, heating rates, gas injection, vacuum at the touch panel
    • Display of all process-relevant data on a process control diagram
    • Automatic gas supply for one process gas (N2 , argon or forming gas) with adjustable flow
    • Bypass for flooding and filling the chamber with process gas controlled by the program
    • Automatic pre- and post programs, including leak test for safe furnace operation
    • Automatic gas outlet with bellows valve and overflow valve (20 mbar)
    • Transducer for absolute and relative pressure
  • MFC flow controller for alternating volume flow and generation of gas mixtures with second process gas (only with automation package)
  • Partial pressure operation: protective gas flushing at controlled underpressure (only with automation package)
  • PC control via NCC with corresponding optional documentation and connection to customer PC networks