Two Pass Hot Water Boiler Daboo Sanat

Both hot water boilers are designed and manufactured according to EN12953, BS2790 Europe and ISIR4231, Iran's national ISIR7911. All stages of production of these boilers are closely monitored by the Iranian Institute of Standards and Industrial Research as well as by the Iranian Quality and Standards Inspection Company. The steel used in the manufacture of pressure zones is DIN17155-17mn4 and non-pressure zinc EN10025-S235JR and heat transfer pipes made of DIN17175-ST35.8 which are manufactured and used by the most prestigious European suppliers. Welding of all pressure areas by the SAW (Sub Powder) method is carried out with a fully automatic canvas and column, positioner and tank handler which provides the highest quality of welding and integration. In non-pressure and root welding zones, SWAW method and manual welding with E7018, E7010 electrodes are used in accordance with WPS and PQR. All hot water boiler lines are tested by NDT tests such as RT, UT, PT and VT according to the above standards. Also, all welders are tested according to EN287 and have a welding qualification certificate from the most prestigious inspection and testing centers under the complete supervision of the factory's quality control unit.

Hydrostatic testing is designed at 1.5 times the pressure and after all the welding operations are performed for one hour with water at least 7 ° C with the supervision of resident inspector and quality control department. The doors are insulated and fireproofed by a ceramic fiber with a density of 128kg / m³ with a temperature tolerance of 1260 ° C by means of a liner method which avoids energy loss and compliance with the long term heat shock requirements of NFPA85 & 86 and is durable in the long term. No maintenance. Boiler body insulation is also carried out with ceramic fibers with densities of 128kg / m³ and 96kg / m³ with a temperature of 1260 ° C 2 and 3 inches thick (depending on pressure and operating temperature) and retaining coatings of coated galvanized aluminum sheets. And it's stainless steel. The covers are insulated in such a way that there is no gap between them and the temperature difference of the body is at a maximum ambient temperature of 15 ° C.

Advantages and Specifications:

The main furnace in this design is off-center and is located below the vertical axis of the boiler. The sub-oven is mounted at the bottom of the boiler and completely humidifies the rear. It also plays a role in creating turbulence and eliminates the need for refractory materials and Chinese bricks at the bottom of the boiler, preventing long and expensive repairs and increasing system efficiency and service life.
In manhole boilers and multiple handheld boilers, it provides access to the surface of the tubes and furnaces, making it easier for the consumer to disassemble and repair. To facilitate service, inspections and repairs, furnaces and heat transfer pipes are designed to be completely independent of each other.
By placing the main furnace at the bottom of the device and the heat transfer pipes at the top of the furnace, the natural course of combustion products flow correctly. By placing the reversible water nozzle underneath the furnace, the energy absorption rate is increased and the pipe thickness, which is the least thick in the overburden, is prevented. This causes these boilers to perform better than similar designs for back flame boilers.
The design of the boiler is performed with a pressure of 1.1 times the operating pressure. The boiler is designed with a pressure of 1.5 times the pressure and tested with hydrostatic pressure at least 7 ° C.
The power required to operate the boiler is in three phases (50Hz, 380V).
These boilers have been designed in such a way that the lowest possible pressure drop occurs in their combustion chamber, so any standard burner can be used to operate them.
The chassis is a steel box mounted on two steel studs, joined by two studs, creating a fully integrated surface.
Economizers, recuperators and turbulators are energy-saving systems that some or all of them are installed on a hot water boiler due to the capacity and pressure of the device and on the basis of economical savings.
The thermal efficiency of these boilers is guaranteed to be 88% without energy-saving systems and has A Grade A, which can be up to 92% efficient depending on the capacity of the boiler and installation of energy-reducing systems.