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How To Select Vacuum Furnace Products?

Jun. 14, 2023

How To Select Vacuum Furnace Products?

The selection of the vacuum furnace mainly involves the pumping speed of the vacuum pump and the selection of the material of the heating chamber. The most suitable product equipment can be selected by comprehensively considering the use range of the product vacuum, the material processing temperature and other factors.


1. Vacuum Selection

The working vacuum degree should be selected according to the material and the heating temperature. First, the working vacuum degree required by non-oxidizing heating must be met, and then the surface brightness, degassing, and alloy element evaporation should be considered comprehensively. The recommended working vacuum degree for common material vacuum treatment is as follows:


Vacuum heat treatment

Recommended working vacuum

Vacuum brazing

Recommended working vacuum


1-10-1 Pa

Aluminum products


Stainless steel, high temperature alloy

10-2 -10-3 Pa

Copper base products

10-1 -10-2 Pa

Titanium alloy


Nickel-based products

10-2 -10-3 Pa

Copper alloy

133-13.3 Pa

Multicomponent alloy product

10-1 -10-3Pa


2. Selection of heating and thermal insulation materials

The equipment can choose different heating elements and heat insulation layers according to different operating temperatures. The commonly used heating element materials are heat-resistant steel (Cr20Ni80), high-purity graphite, molybdenum and alloys, tungsten and alloys, etc. The temperature range is as follows. In addition to the selection of the above materials, it is necessary to comprehensively consider the energy consumption and stability under long-term use.


Operation Temperature

Heating element selection

Insulation layer selection

850℃ and below

Heat resistant steel (Cr20Ni80)

Heat resistant steel +

Stainless steel


Molybdenum metal or heat resistant steel

Molybdenum metal + Stainless steel

Molybdenum metal + graphite felt


Molybdenum-lanthanum alloy

Molybdenum-lanthanum alloy + Stainless steel

High purity graphite

Graphite soft felt +Graphite hard felt


Isostatic graphite

Graphite soft felt +Graphite hard felt

Tungsten alloy

Tungsten alloy+Molybdenum-lanthanum alloy + Stainless steel


Isostatic graphite

Graphite soft felt +Graphite hard felt


Tantalum+Molybdenum-lanthanum alloy + Stainless steel


3. Meaning of equipment model

J: The first letter of the company's English name V:The first letter of vacuum


Furnace Type



JVOQ series double-chamber oil quenching vacuum furnace

JVOQ966M Molybdenum heating chamber double-chamber oil quenching vacuum furnace

OQ: Oil quenching abbreviations

966: Effective zone size

M: Molybdenum heating chamber

JVGQ series high pressure gas quenching vacuum furnace


10bar Molybdenum heating double-chamber high-pressure gas quenching furnace

GQ:Gas quenching abbreviations

966: Effective zone size

M:Molybdenum heating chamber

10bar:Gas quenching pressure

JVAF series annealing vacuum furnace


AF:annealing furnace abbreviations

966:Effective zone size

JVTF series tempering vacuum furnace


TF:tempering furnace abbreviations

966:Effective zone size

JVAB series aluminium brazing vacuum furnace


AB:Aluminium brazing abbreviations

3511:Effective zone size

JVHB series high temperature brazing vacuum furnace


HB:High temperature brazing abbreviations

966:Effective zone size

JVDB series diffusion bonding vacuum furnace


DB: diffusion bonding abbreviations

966:Effective zone size

JVSF series sintering vacuum furnace


SF: Sintering furnace abbreviations

966:Effective zone size

JVLF series laboratory vacuum furnace


LF:Laboratory furnace abbreviations

211:Effective zone size


Note: Vertical vacuum furnace add V (Vertical) after the above model letters.



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