Recently, Zhengzhou Fangkuai Boiler Company has received many inquiries from users who want to purchase hot water boilers. For example, how does a hot water boiler achieve energy-saving operation? Why should the economizer and recirculation door be closed when the boiler is filled with water? In addition, what is the phosphate treatment of boiler feed water? Today, our technical engineers are here to answer questions for everyone.
The energy-saving operation of the hot water boiler is specifically reflected in: the heating temperature of the boiler can be very low, and the outlet temperature is in the range of 110-150 ℃. In the boiler heating process, all are sensible heat parts and no latent heat parts. In addition, the exhaust temperature of the boiler is low, so that the heat loss is small.
Why should the economizer and recirculation door be closed when the boiler is filled with water?
This is because when the boiler is started or shut down, it is sometimes for intermittent water supply, which plays a certain role in protecting the energy-saving device. At this time, the circulation door must be closed, otherwise the effect of protecting the economizer cannot be achieved. In addition, if the recirculation door is not closed during the process from the boiler to normal operation, it will affect the boiler steam quality, and there will be some other effects.
How to correctly understand the phosphate treatment in boiler feed water?
The phosphate treatment of boiler feed water is simply to add phosphate to the boiler feed water. In this way, scale will not form in the boiler, but water slag will be generated and can be discharged through the boiler blowdown, thus avoiding the boiler The problem of rust corrosion.
Recently, Zhengzhou Fangkuai Boiler Sales Co., Ltd. traveled to Dhaka, the capital of Bangladesh, to attend the Bangladesh International Textile, Knitwear & Garment Industry Exhibition (BTKG 2026). It showcased industrial thermal equipment and system solutions adapted to the whole process of textile printing and dyeing, actively expanding the South Asian market.
Bangladesh is an important global producer and exporter of textiles and garments. As a pillar local industry, the textile sector has long-term and strong demand for high-efficiency, stable and energy-saving industrial boilers and thermal equipment, with broad market potential. This exhibition participation is an important measure for Zhengzhou Fangkuai Boiler Sales Co., Ltd. to advance its internationalization strategy and further explore overseas markets.

Relying on its technological accumulation and manufacturing advantages in the field of thermal energy equipment, the company provides targeted thermal energy solutions for local textile, printing and dyeing, garment manufacturing and other industries, helping enterprises improve production efficiency and reduce operating costs. In the future, Zhengzhou Fangkuai Boiler Sales Co., Ltd. will continue to focus on overseas market demands, continuously optimize its product and service system, facilitate the high-quality development of the global textile industry with professional and reliable products, and steadily enhance the brand’s competitiveness and influence in overseas markets.

Trust stems from quality
At the beginning of the new year, Fangkuai Boiler and a leading domestic new energy company have reached another important cooperation, successfully signing an order for a total of 500 steam tons.






