zozen boiler
Home Service FAQs Boiler basics What is a three-pass steam boiler and what are its advantages?

What is a three-pass steam boiler and what are its advantages?

02 Apr 2021

Three-pass steam boilers are so-called because the combustion gases that are produced inside them in the burner go round a circuit that has three parts before leaving it:

  • The first pass of gases takes place when they leave the burner for the combustion chamber.
  • The second pass of gases is through the inversion chamber, which is completely cooled by water.
  • The third pass of gases sends them back in the opposite direction towards the rear gas chamber.

Boilers that have this internal structure tend to use larger volumes of water due to their design, compared to other boilers that have two gas passes.

This means they can absorb specific production peaks due to having larger volumes of water that can be evaporated and transformed into steam.

Related news View More
  • ZOZEN Boiler’s Customized Solution Empowers Bestway’s Vietnam Plant for Efficient Growth
    In the global leisure and entertainment product manufacturing sector, Bestway Group is undoubtedly a leading player. With operations spanning over 200 countries and regions, its product portfolio covers around 800 items across leisure, sports, and camping categories. As the company continues to expand its industrial footprint, the Bestway plant in Tien Giang Province, Vietnam, faced an urgent need for a reliable and efficient heat energy supply to support production. ZOZEN Provides a Tailored...
    19 Aug 2025
  • ZOZEN Gas-Fired Boilers Help Mongolia MCS Coca-Cola Reach New Heights
    In 1886, Atlanta pharmacist John Pemberton mixed the first glass of Coca-Cola. What began as a “brown tonic” selling 25 bottles a day has since become a global beverage legend, spanning more than 200 countries with 2 billion servings consumed daily. In Mongolia, its exclusively authorized producer MCS Coca-Cola is expanding into new categories such as iced tea and juices. Powering this strategy is the thermal engine behind the scenes: three 8 t/h WNS series gas-fired steam boilers fr...
    12 Aug 2025
  • ZOZEN Boiler Empowers Green and High-Quality Industrial Development in Liaoning
    In recent years, green manufacturing and high-quality development have become the main themes of China’s industrial transformation and upgrading. As a leading domestic supplier of high-efficiency and clean boilers, ZOZEN Boiler, backed by profound technical expertise and extensive industry experience, has been repeatedly selected for key projects across Liaoning Province, continuously injecting robust momentum and green energy into local industries. ZOZEN’s Boiler Solutions Serve ...
    05 Aug 2025

Find the Right Boiler For You

Name *

Email *

WhatsApp/WeChat

Products

Power/Capacity