Three-target vacuum tube

Group Solar Vacuum Tube
PriceUS $2.3-6 / set
Min. Order 1000 set
Terms of Payment Western Union, T/T
Update Time 2018-11-27
Item specifics
ApplicationWater Heater
Pipe MaterialGlass

Three-target vacuum tube Technical Parameters



  All-glass double-tube co-axial structure

  Glass material

  High borosilicate 3.3 glass

  External pipe diameter and  thickness

  Φ=47±0.7mm  &=1.6mm,  Φ=58±0.7mm  &=1.6mm,
  Φ=70±0.7mm &=2.0mm

  Internal pipe diameter and thickness

  Φ=37±0.7mm &=1.6mm,  Φ=47±0.7mm &=1.6mm,
  Φ=58±0.7mm &=1.6mm

  Pipe length

  800mm,    1200mm,  1500mm,  1600mm,
  1800mm,  1900mm,  2000mm,  2100mm

    Absorbing  coating property



 Sediment  method

  3 target magnetron sputtering plating

 Specific  absorption


 Emission ratio


  Vacuum tightness


  Idle sunning property parameters


  Solar irradiation   for obtaining a   preset water   temperature





  Average heat loss coefficient



Three-target vacuum tube Working Principle:

Tri-target solar vacuum tube, connecting with water tank or manifold, when it works, cold water flows down into the vacuum tube, and there it is heated with solar energy absorbed by the coating outside of inner vacuum tube, the solar will be absorbed efficiently by the coating with little loss of heat because of the vacuum between the inner and outer glass tubes, and when cold water becomes hot, hot water will rise up to water tank or manifold because of the larger proportion to cold water, cold water again flows into solar vacuum tube for another heating process.


Three-target vacuum tube


Three-target vacuum tube