One, vertical double return structure

Vertical oil-fired gas steam boiler using the burner under the way, two-way structure, fuel combustion is full, stable boiler operation; flue pipe inserted with spoiler, slowing down the speed of smoke exhaust, increase the heat transfer, boiler thermal efficiency, reduce the cost of user use.

Two, horizontal three-way structure

Horizontal steam boiler for the shell-type full wet back downstream three-way smoke and fire tube structure, the flame in the large combustion chamber micro-positive pressure combustion, fully extended, combustion heat load is low, combustion thermal efficiency is high, effectively reducing the exhaust temperature, energy saving, use of economic. Corrugated furnace chamber and threaded pipe structure, that is, to improve the boiler's heat-absorbing strength, but also to meet the need for heat expansion of the heat transfer surface, scientific and reasonable, durable.