The Carbolite GVA & GVC Modular Vertical Tube Furnaces use free radiating wire elements embedded within the insulation of the furnace body.

The benefit of this design is its flexibility with the use of tube adapters the same furnace can be used with a variety of tube diameters.

The extended uniform zone in the mid-section of the work tube in the GVC 3-zone furnace is achieved with the use of end zone controllers which track the centre zone temperature and compensate for the loss of heat from the tube ends.

This tube furnace range does not include an integral work tube and one must be selected as an additional item. The work tube length is dependent on the application, for example, for use with modified atmosphere or vacuum. The use of a separate work tube has the advantage of protecting the heating elements from damage or contamination.

Standard features

• Heated lengths, single zone 300, 450, 600, 750, 900, 1050 or 1200 mm (GVA)
• Heated lengths, 3-zone 450, 600, 750, 900, 1050 or 1200 mm (GVC)
• Long life, rapid heating, resistance wire elements mounted in rigid, vacuum formed insulation modules
• End zones 150 mm long on each end (GVC)
• End zone control via back to back thermocouples (GVC)
• Supplied with versatile stand for vertical, wall mounted and horizontal use
• Control module with 2 metre conduit to furnace

Options (specify these at time of order)

• A range of sophisticated digital controllers, multi-segment programmers and data loggers is available. These can be fitted with RS232, RS485 or Ethernet communications
• Over-temperature protection (recommended to protect valuable contents & for unattended operation)
• A range of additional work tubes, end seals and work tube packages is available for use with modified atmosphere and/or vacuum
• Vacuum packages with a choice of rotary vane pump or turbomolecular pump are available for furnaces with tube inner diameters of 60 mm and above
• Wide choice of tube diameters and materials is available: eg quartz, ceramic, metal
• Available without stand (comprising control module & furnace body)
• Insulation plugs & radiation shields to prevent heat loss & improve uniformity
• End zones 300 mm long (GVC)
• Modified atmosphere and vacuum assemblies are available
• Control module on longer 6 metre conduit (GVC)
• Retransmission of Setpoint control configuration to facilitate programmed cooling

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