Three Pass Fire Tube Boiler Manufacturers China

In China, there are many boiler manufacturers providing fire tube boilers and water tube boilers for various industries. ZBG is the leading one which supplying typical and popular three pass fire tube boilers for most middle-and-small factories or communities or institutions.

Three pass fire tube boilers for sale

The Firetube boilers are often characterized by their number of passes, referring to the number of times the combustion (or flue) gases flow the length of the pressure vessel as they transfer heat to the water. Each pass enables the hot combustion gases to pass through the boiler tubes in the different direction. Every time, for conceiving next pass, the flue gases in the boiler make a shift of 180 degrees and go back via the shell.

A typical three-pass boiler consists of three sets of boiler tubes whereas a four-pass boiler contains the four sets. The stack outlet in case of former one is normally positioned at the back end of the boiler while the latter one will have the stack outlet located at the front end. Various types of boiler tube arrangements are available for fire tube boiler systems depending upon the number of passes made by the hot flue gases emerging from the boiler furnace till the time they get cleared out of boiler system.

fire tube gas or oil fired boiler three pass structure

In case of boilers made up of plain steel, the hot combustion gases going in to the reversal chamber are required to be cooled down to a temperature of 420°C prior to their entrance whereas in case boilers having alloy steel construction, this temperature should be at least 470°

Three pass gas & oil fired boiler manufacturers China

ZBG has the most welcomed gas & oil fired boilers made in China, usually 1 ton - 20 ton to meet the steam and hot water demand in various applications. Any requirements please write down and send us, sales managers will contact as soon as possible!