ZHEJIANG LIJU BOILER CO., LTD
Provide the most efficient and safe heating system

R&D Center

LIJU invested more than 10 million in R&D Center ,which is an R&D platform of large boilers .it was equipped with the most advanced testing instruments to complete full function test of maximum 10-ton boiler.

LIJU R&D

LIJU always believes in Science and technology is the primary productive force .It invests 5% of sales as R&D fees every year.In the short 16 years , lIJU leads to popularizing vacuum boilers in china from the first to the fifth generation at present. The new steam boilers never explode and change the industry's traditional concept ,which is an ordinary product of LIJU. Depending on continue R&D investment and R&D talents training, LIJU was the first at more industries and benefits to thousands of users .

Core Technology One

Whole condensing heat recovery technology (Recommended energy-saving special equipment )

Zhejiang LIJU developed the avand condensation technology made the unit efficiency up to 103%( Low heat values),the comprehensive efficiency impoved 10%, the energy-saving benifits is apparent. The whole condensing heat recovery technology integrated the residual heat device of fuel gas with the boiler body,which improve effect of condensation heat transfer and compact conformation and installation conveniently.

Core Technology Two

Fully premixed combustion technology (Supported by the National Innovation Fund)

LIJU introduced the most advanced premixed combustion technology from Germany and developed fully premixed combustion device .LIJU solved effectively the flameout and backfire phenomena by adopting Fully Pre-mixed Surface CombustionTechnology ,Gas Flow Rrequency Conversion Regulating Technology and Flame Stabilization Technology. Compared with conventional combustion ,The fully pre-mixed combusiton has many advantages.(1)suited for low pressure natural gas and gas pressure fluctuation strong (low to 2KPa,household gas pressure);(2)Very low combustion noise and low to noteless.(3)All variable frequency regulation can improve operation efficiency greatly.

Core Technology Three

Vacuum boiler full automatic production lines

  • Steel plate cutting——Adopting CNC plasma cutting system from HYPERTHERM in American to cut parts precisely.

    Adopting CNC plasma cutting system from HYPERTHERM in American to cut parts precisely.Adopting CNC plasma cutting system from HYPERTHERM in American to cut parts precisely.Adopting CNC plasma cutting system from HYPERTHERM in American to cut parts precisely.
  • Shell molding ——Adopting PLC digital control automatic lapping mashine from HOLLYSYS to control shell roundness error within 1mm.

    Adopting PLC digital control automatic lapping mashine from HOLLYSYS to control shell roundness error within 1mm.Adopting PLC digital control automatic lapping mashine from HOLLYSYS to control shell roundness error within 1mm.Adopting PLC digital control automatic lapping mashine from HOLLYSYS to control shell roundness error within 1mm.
  • Tubesheet manufacturing——Adopting CNC machining center with FANUC series technology from HISION to keep vacuum degree ,high accuracy and high efficiency .

    Adopting CNC machining center with FANUC series technology from HISION to keep vacuum degree ,high accuracy and high efficiency .Adopting CNC machining center with FANUC series technology from HISION to keep vacuum degree ,high accuracy and high efficiency .Adopting CNC machining center with FANUC series technology from HISION to keep vacuum degree ,high accuracy and high efficiency .
  • Shell welding——Adopting the world-leading automatic weld machine from Lincoln to guarantee welding quality of unit.

    Adopting the world-leading automatic weld machine from Lincoln to guarantee welding quality of unit.Adopting the world-leading automatic weld machine from Lincoln to guarantee welding quality of unit.Adopting the world-leading automatic weld machine from Lincoln to guarantee welding quality of unit.
  • Flue tube welding——Adopting automatic tubesheet weld machine from EWM in Germany , stable welding quality and high efficiency.

  • Sand blasting——Adopting sand blasting equipment to process surface stains of parts and improve the welding quality and presentation quality.

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  • CNC package——Adopting CNC package equipment to guarantee assembling of units accurately

  • Products testing——Adopting the vacuum helium leak detector from ULVAC in Japan. The sensitivity is up to 2×10-12Pa/m3.s ,it means that the air leak in unit in 10 years is not 0.1L.


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