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Compact Vacuum Arc Melting System with 7 Cavities - EQ-SP-MSM207

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Vacuum pressure gauge:
EQ-SP-MSM207 is a compact vacuum arc melting furnace with a non-consumable tungsten electrode and water-cooled copper crucibles. A built-in mechanical manipulator is included for tilting and rotating metal ingots for the re-melting process. Vacuum casting faction fixture can be added as optional. It is an excellent tool for smelting metal alloys for phase diagram research.


  • Designed for melting samples < 10 g up to 3000 °C under tiny positive pressure or low vacuum
  • Water-cooled vacuum chamber, electrode, and copper crucible allows arc melting of multiple samples without cross-contamination
  • Powerful arc melting power supply enables reliable, stable arc ignition
  • Easy electrode tilting and height adjustment via a handwheel
  • A built-in mechanical manipulator for tilting and rotating samples without breaking the vacuum
  • A tinted observation window on the front for monitoring melting process
               Chamber Door       Front Window    Flashlight Insert       Manipulator
Vacuum Pressure Gauge
Power Supply  
  • Input voltage: 110 or 220 VAC selectable, single phase
  • Input current: 34A max. (One 40A breaker is installed in the power supply. Recommended wall breaker amp ≥ 40A)
  • Output DC output: 15 V / 125 A at 35% duty cycle - 110 V input
                                     18 V / 185 A at 35% duty cycle - 220 V input
  • Minimum DC current output: 5 A
  • Pulse DC and AC output modes available
  • Foot pedal control of the output current
Tungsten Electrode

  • 4 mm Dia. tungsten electrode with water cooling
  • Easy electrode tilting and height adjustment (30 mm max) for multiple-cavity melting
  • Capable of melting samples < 10 g ( SS304) in each cavity up to 3000 °C, which can melt all types of metals
  • Pic.A is a 4.5 g tungsten melt drop 
  • Pic.B is a 10 g tungsten melt drop
               A.4.5 g         B.10 g 
Copper Crucible
  • Water-cooled copper crucible plate with 7 cavities of 25 mm Dia. × 8 mm depth (Pic 1)
  • Customizable copper crucible is available upon request at extra cost (Pic 2 &3).
  • Max. melting amount of SS304 in single cavity crucible is about 50g with optional high power supply 
  • Vacuum suction casting module is avaialble ( click pic 4 to order ) .  
          Pic 1     Pic. 2       Pic. 3       Pic 4   
Vacuum Chamber

  • Water cooled vacuum chamber with dimensions of Φ 182 mm × 225 mm H
  • A Φ120mm front door for easy sample loading and retrieving
  • A tinted observation window on the front for monitoring melting process
  • A built-in mechanical manipulator for tilting and rotating samples without breaking the vacuum
Vacuum Pump (Optional)

Water Chiller & Gas (Optional)
  • Water cooling is required (not included) for the chamber, copper mold, and electrode. Please consider our KJ-5000 recirculating water chiller.
  • Water tube for MTI Water Chiller is Size: 12mm O.D x 8mm I.D
  • High purity inert gas with at least 5N purity (>99.999%) is required (not included)
  • 5% Hydrogen + 95% Argon gas may be used to prevent oxidation during melting process
Furnace Dimensions 
  • 540 mm W × 540 mm D × 920 mm H (exclude the power supply) 
  • Power supply dimension: 320 mm L x 185 mm W x 485 mm H
Chamber Dimensions

  •      Φ182 mm × 225 mm
Net Weight
  • 50 kg
  • CE certified
  • UL/CSA certification by NRTLs is available at an extra fee. Please contact us for the quote. Click here to understand the certificate and condition.
  • One-year limited warranty with lifetime support
Operation Manual & Video           
Related Article
Application & Warning Notes

  • 5N purity Ar gas is required for arc melting. Gas purification module is recommended to ensure gas purity. (click Pic.1 to order)
  • A two-stage pressure regulator must be installed on the gas cylinder to limit the pressure to below 3 psi for safe operation. Click here to learn the installation of a gas regulator (Pic.2)
  • To avoid any damages to the mechanical pump or turbo pump, please install an Inline Particle Trap (maximum 1E-4 Torr vacuum with turbo pump) on the pump inlet port (Pic. 3)
  • Must Wear Welder Glass or Auto Welding Shade while observing the Arc while welding. 
  • An example of the system setup with turbomolecular pump can be on the left
  • The unit is designed for arc melting operation under tiny positive pressure or low vacuum (0.01 – 0.11 MPa pressure, or positive 0.01 MPa to negative 0.09 MPa pressure). Never operate the unit at high vacuum or high positive pressure!
  • During arc melting operation, never allow the electrode to touch the material or the copper crucible! Do not operate the mechanical manipulator during the melting process.
  • Option: The user may use a quartz tube shielding to effectively reduce the splash and spilling while arc melting. Please click pic 4 to watch the demo video.
                   1                         2                           3                            4

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1. Prices listed online are valid for US market and whom pay by credit card only. There will be extra charges for shipping & handling. Price various from country to country.
2. We may add extra charges for paper order and net30 terms due to extra labor cost.
3. The prices listed are subject to change without notice.