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FRH/FRV Series (up to 1300°C)

FRH/FRV Series (up to 1300°C)

The advanced FRV/FRH Series air furnaces from Linn High Temp are high-precision tube furnaces designed for laboratory use, offering excellent temperature uniformity and rapid heat-up cycles. Suitable for vertical (FRV) or horizontal (FRH) operation, these gastight furnaces support long-term operation at 1250 °C, with a maximum temperature of 1300 °C.

High-performance insulation is achieved through vacuum-formed ceramic fibre shells, while heating is provided by spiraled FeCrAl wire heaters embedded in the insulation. Temperature is measured with high accuracy using a Type S (PtRh/Pt) thermocouple. The series supports tube diameters from 40–100 mm with heated lengths of 250–520 mm, and 3-zone models range from 40–150 mm in diameter with heated lengths from 750–1000 mm.

Standard Options:

  • Control: Different temperature controller
  • Data recording
  • Endcaps
  • Insert tubes

Main application:

  • Continuous heating of wires and tubes
  • Crystal growth
  • Gas-phase reactions
Type T max °C Zones Inner – φ mm Heated length mm kW
FRH-40/220/1250 1300 1 40 220 0,86
FRH-40/520/1250 1300 1 40 520 1,35
FRH-70/520/1250 1300 1 70 520 2,22
FRH-100/520/1250 1300 1 100 520 2,88
FRH-3-40/750/1250 1300 3 40 750 2,77
FRH-3-70/1000/1250 1300 3 70 1000 5,02
FRH-3-100/1000/1250 1300 3 100 1000 7,08
FRH-3-150/1000/1250 1300 3 150 1000 9,5