Absorb 4.5 million farmers into factory practitioners, annual output accounting for one third of total output, which in the low-pressure pipe production account for 80% of total production.

Sensitive materials under low stress will suffer breakage which brings about large risk explosion of pressure bearing pipe and equipment is easily to be triggered causing major accident.

Then this low-pressure liquid Freon goes out of the capillary pipe through Control valve 13 and enters Heat-exchange unit 16 to consume heat from low grade heat source.