Can run at low pressure (<0.5Mpa), get a higher working temperature (= 320), reduces the compression levels of heat equipment can improve the security of the system. Even soft, temperature control with PID self-tuning intelligent control, temperature control and high precision (= ± 1 ?), to meet the high technical standard requirements. Small size, small footprint, can be installed in the vicinity of heat equipment, do not need to set up boiler rooms, no need for special operation, can reduce equipment investment and operating costs, faster return on investment.