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目前显示的是 九月, 2020的博文

How Does H.Stars Group Produce A High Quality Water Cooled Chiller

  Since  H.Stars Grou p  has been established for more than 28 years so far, some of you might wonder how H.Stars produces a high quality  water cooled chiller . Below is the detailed production process with strict quality control system and 100% testing before delivery. ​ 1. Chiller Frame welding: clean the bracket and select the appropriate welding method according to the specifications of the welding materials and the technical requirements. 2. Chiller Bracket assembly: compressor, electric box, filter and other brackets are assembled and welded according to the required sizes from the drawing. 3.Shell and tube evaporator and condenser assembling process: the evaporator and condenser ,self-manufactured by UAR ,the subsidiary of H.Stars Group, is in welding process according to buyer’s requirements and H.Stars  R&D team design. 4.Sheet metal: the electric control box shell on the H.Stars chiller is designed and manufactured independently, and the quality is under the control of t

Basic requirements for structural design of low temperature heat exchanger

  Carbon steel and low-alloy steel heat exchangers (design temperature lower than -20℃), austenitic stainless steel heat exchangers (design temperature lower than -196℃) are low temperature heat exchangers, and the structural design should follow the following in principle. Material selection of  low temperature heat exchanger : 1. Use temperature of plastic materials Polyvinyl chloride (PVC) -15℃~+80℃, polypropylene (PP) -30℃~+140℃, polyurethane (PU) -70℃~+80℃, polyethylene (PE)-100℃~+100 ℃. Plastics tend to be brittle in low temperature environments. 2. Operating temperature of carbon steel and low alloy steel Q345R steel plate can be used at -60℃~-40℃ under low temperature and low stress conditions, and 16MnDR steel plate for low temperature can be used at -80℃~-70℃ under low temperature and low stress conditions. Q235B steel plate cannot be used in low temperature heat exchangers. 3. Operating temperature of high alloy steel (stainless steel) 1. The lower limit of the operating tem