The gas-fired steam boiler is a star product of Zhengzhou Fangkui Boiler Factory. As for why it sells very well, it is mainly related to the performance advantages of the boiler itself. However, many users still have some doubts when operating this type of boiler. Today, Zhengzhou Fangkui Boiler Company will come to answer them one by one.
What is the role of circulating water in gas steam boilers?
In a boiler such as a gas-fired steam boiler, the purpose of circulating water inside is to allow the heating surface of the boiler to be evenly heated, so that the heat energy can be effectively transferred to the heat medium, and then the boiler can generate steam.
Are there any requirements for the feed water temperature of gas steam boilers?
Regarding the feed water temperature of gas-fired steam boilers, there are currently no regulations in this regard, which are generally determined based on actual conditions and deaeration conditions.
What is the difference between two-pass and three-pass in gas steam boilers?
In the gas-fired steam boiler, the second return stroke means that the boiler is not provided with a second return stroke smoke tube, etc., and the flue gas in the furnace is from front to back. The three-pass means that the flue gas is discharged from the boiler after the heat is transferred from the furnace, the two-pass smoke pipe and the three-pass. This is the difference between them.
Is there a difference between the theoretical and practical gas consumption of a 0.3-ton gas-fired steam boiler per hour?
A 0.3 ton gas steam boiler is a 0.3 ton gas steam boiler. The theoretical value of gas consumption per hour is about 21 cubic meters, but in actual operation, it will be lower than this value. As for the specific data, it depends on the actual Situation.
We, Zhengzhou Fangkuai Boiler Co., Ltd. (Fangkuai), are excited to announce our participation in the Indonesia International Heating Technology Exhibition 2025. We will be showcasing our advanced boiler systems engineered for higher efficiency, lower emissions, and sustainable energy performance. Join us at Booth No. B1-08 from November 5–7, 2025 at the Jakarta Convention Center.
The event brings together EXPO BOILER, EXPO BIOMASS, EXPO PUMPS & VALVES, and EXPO CRANE — creating a comprehensive platform for technology exchange and business collaboration across the industrial heating and energy sectors in Southeast Asia.
At the exhibition, we will present our integrated solutions including biomass boilers, industrial steam systems, and full power plant EPC services. Our products emphasize:
Event Details
Date: November 5–7, 2025
Venue: Jakarta Convention Center, Indonesia
Booth: B1-08
We welcome industry partners, plant owners, EPC clients, and technology scouts to visit our booth and explore collaboration opportunities. Whether you are planning a biomass retrofit, a new power plant EPC project, or seeking high-efficiency boiler equipment, our engineers will be available for technical discussions and project consultations.
Visit our booth / Contact us












Wins Another Invention Patent
Brilliant Glory, Continuing to Write a Brilliant Chapter
Striving for "Innovation" and "Quality"
Focusing on Cutting-Edge Technologies
Creating New Momentum and New Advantages
Promoting the Continuous "Innovation" of New-Quality Productivity
On June 17th, our company was awarded another national invention patent. To date, the company has secured 162 national patents and 13 invention patents, and has been deeply involved in the formulation of eight national and industry standards. We continue to lead industry development with technological breakthroughs.

Overcoming challenges and achieving remarkable results
Attaching great importance to technological innovation
While pursuing superior quality, Fangkuai also attaches great importance to technological innovation.
Developing product diversity
To better meet the diverse needs of consumers, Fangkuai develops diverse product images during R&D and production.
Fangkuai family portrait

Gloriously writing a new journey
The company has always adhered to the philosophy of
"Building Character, Creating Quality Products"
Using technological R&D as the core driving force
Also promoting application
Effectively promoting technological advancement in the industry and engineering products
Future

Continued
Scientific and technological R&D and technological achievement transformation
Generate more core independent intellectual property rights
Solidly promote the company's high-quality development