Dry Back Three Pass Steam Boiler

1- For its efficiency and reliability these types of boilers are widely used in industry. The exhaust gases pass three times inside these boilers. The exit temperature of the exhaust gases are less than two pass types boilers. The heating surface area is big enough to reach efficient and safe operation.
2-Net heat transfer area information of the boilers are given to the customers.
3- Dry back design is used for economical production and safe operation.
4- Our company has ISO9001 quality management system certificate.
5- Certificated  tubes and steels are used. (EN12953 norms apply) - P235GH, P265GH, P295GH and P355GH steel plates, EN10217 & DIN17175 tubes are used.
6- Boilers are insulated with min. 100 mm thick rockwool.
7- Tubes are roller expanded and then welded to the min. 15 mm thick mirror plates to prevent crackings. 
8- For high pressure types combustion chambers are manufactured as corrugated type to provide higher strength and to overcome thermal expansion problems.
9- Upon request our boilers are supplied fully assembled with armatures and necessary equipments including deaorator, economisor and recuparator.
10- High quality and well known marks are used for armatures. All packaged boilers have furnace overheat alarm system.
11- Special refractories can be applied for oil and solid fired boilers.
12- Welding are  controlled according to EN 12953 & PED97/23 requests by ultrasonic testing method. Tests are carried by EN473 & ASNT certificated personal.
13- It is easy to reach and clean thefire tubes of the boilers.
14- Welding are done according to approved WPS's  and WPQR's. Submerged arc welding, SMAW , MIG-MAG welding systems are used.
15- Our welder are certificated according to EN 287. The welders are controlled by EN 719 certificated welding supervisor.

Dry Back Three Pass Firetube Steam Boiler