Carbolite Gero Ltd - part of Verder Scientific

- Model GVA/GVC - Modular Vertical Tube Furnaces

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The tube furnace range GVA (single zone) / GVC (three zone) uses 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.

  • Carbolite Gero 301 controller, with single ramp to set-point & process timer
  • Accepts work tubes with outer diameter up to 170 mm
  • 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

  • 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

GVA 12/300
Max temp (°C): 1200
Number of heated zones: Single zone
Dimensions: Heated tube length (mm): 300

GVA 12/450
Max temp (°C): 1200
Number of heated zones: Single zone
Dimensions: Heated tube length (mm): 450

GVA 12/600
Max temp (°C): 1200
Number of heated zones: Single zone
Dimensions: Heated tube length (mm): 600

GVA 12/750
Max temp (°C): 1200
Number of heated zones: Single zone
Dimensions: Heated tube length (mm): 750

GVA 12/900
Max temp (°C): 1200
Number of heated zones: Single zone
Dimensions: Heated tube length (mm): 900

GVA 12/1050
Max temp (°C): 1200
Number of heated zones: Single zone
Dimensions: Heated tube length (mm): 1050

GVA 12/1200
Max temp (°C): 1200
Number of heated zones: Single zone
Dimensions: Heated tube length (mm): 1200

GVC 12/450
Max temp (°C): 1200
Number of heated zones: Three zone
Dimensions: Heated tube length (mm): 450

GVC 12/600
Max temp (°C): 1200
Number of heated zones: Three zone
Dimensions: Heated tube length (mm): 600

GVC 12/750
Max temp (°C): 1200
Number of heated zones: Three zone
Dimensions: Heated tube length (mm): 750

GVC 12/900
Max temp (°C): 1200
Number of heated zones: Three zone
Dimensions: Heated tube length (mm): 900

GVC 12/1050
Max temp (°C): 1200
Number of heated zones: Three zone
Dimensions: Heated tube length (mm): 1050

GVC 12/1200
Max temp (°C): 1200
Number of heated zones: Three zone
Dimensions: Heated tube length (mm): 1200

Heat-up time (mins): 82

  • Dimensions: Max outer diameter accessory tube (mm): 170
  • Dimensions: Furnace body length (mm): 1380
  • Recommended tube length for use in air (mm): 1500
  • Recommended tube length for use with modified atmosphere (mm): 1400
  • Dimensions: External Furnace H x W x D (mm): 2018 x 468 x 662
  • Dimensions: Control module H x W x D (mm): 225 x 600 x 380
  • Clearance under furnace H (mm): 26 to 551
  • Uniform length ±5°C (mm): 1015
  • Max power (W): 7000
  • Holding power (W): 3163
  • Thermocouple type: N
  • Weight (kg): 130

Please note

  • Heat up rate when using a ceramic work tube must be limited to 5 °C/min
  • Heat up rate is measured to 100°C below max, using an empty tube & insulation plugs
  • Dimensions excluding control box (225 x 600 x 380 mm)
  • Maximum continuous operating temperature is 100°C below maximum temperature
  • Holding power is measured at continuous operating temperature
  • Uniform length measured with insulation plugs fitted

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