Vacuum Tempering Furnace NVPT series

Equipment Use

Be used for vacuum tempering and annealing.


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  • Product Performance
  • Equipment Features
  • Process flow
  • Product Parameters
  • Working temperature:150℃~700℃

    Rated temperature:750℃

    Furnace temperature uniformity:≤±5℃

    Limited vacuum:≤1.3Pa

    Pressure rising rate:≤0.3Pa/hr

    Heating-up time(from room temperature to 700℃):≤40min 

    Cooling time:≤20min 700℃~100℃(no-loading)


  • 1.After vacuumizing, nitrogen will be filled in with a certain pressure, and conduct convection heating under the protection of nitrogen. No contamination of oxygen and water, so that bright tempering heat treatment can be realized.

    2.The heater adopts circular configuration and independent temperature control by zones to improve the temperature uniformity;

    3.The heating room utilizes ceramic fiber insulation material, which has high strength, small deformation, long service life span, convenient in maintenance, and is apt to get clean heating environment;

    4.The convection heating method is used to improve the low temperature radiation efficiency. In order to further obtain the bright heat treatment effect, full vacuum heating can be selected.

    5.High vacuum degree and high temperature specifications can be selected, and the product has wide application performance.



  • Loading→Pre-vacuumizing→Convection heating/Vacuum heating→Heat preservation by convection/Heat preservation in vacuum→Nitrogen cooling→Unloading.


  • Effective  zone dimensions (W × H × L)600×600×1000mm800×800×1300mm
    Effective  volume4.5m39.0m3
    Loading  rated capacity600kg800kg
    Equipment  weight8ton12ton
    Rated  temperature750℃750℃
    Furnace  temperature uniformity (no load)≤±5℃≤±5℃
    Rated  heating power75kW135kW
    Total  installed power130kVA180kVA
    Convective  heating pressure87kPa abs87kPa abs
    Max  cooling pressure87kPa abs87kPa abs
    Limit  vacuum degree (conventional pump units)≤1.3×100 Pa≤1.3×100 Pa
    Limit  vacuum degree (high vacuum pump units)≤7.0×10-3 Pa≤7.0×10-3 Pa
    Pressure  rise rate≤0.3Pa/hr≤0.3Pa/hr
    Cooling  water consumption15m3/h15m3/h
    Nitrogen  consumption (one cycle)5.6m310.6m3

     *Can be customized according to customer requirements.


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