NAK: A Leader in the field of stainless steel flue liners
Our dedication to continuous growth and innovation has positioned us as the first company in the Middle East to design, develop, and manufacture our own line of CE-certified stainless steel NAK flue pipes.
This achievement ensures that we consistently deliver exceptional quality across all our projects, with our systems undergoing annual ENCE evaluations. With 50 years of expertise, we’ve crafted a pioneering range of flue systems that are not only easy to install and mechanically robust but also fully compliant with European standards.
NAK GE50
NAK BO50
NAK BO25
NAK SW
NAK SW+
NAK OW
NAK GE50
NAK GE50
Designation: EN 1856-1 – T600 – H1 – D – Vm – L50060 – G50
NAK GE50 systems are double wall modular stainless steel flue liner, designated specially to work under elevated temperatures of up to 600C, and high pressure of up to 5000 Pa.
NAK GE50 is fire rated, tested and certified according to EN 1366-1 and BS-476 part 24.
NAK GE50 are produced in sizes from 125 mm to 500 mm. Larger sizes are available upon request.
Inner Wall
The stainless steel AISI type 316L (1.4404) is used for all combustion material and in all conditions, due to its capacity to resist to acids pitting. The thickness is of 0.6mm or greater.
Outer Wall
In moderate environment conditions the stainless steel AISI (1.4301) is used. However, and in high corrosive environment stainless steel AISI type 316L (1.4304) is used.
Insulations between walls
Rockwool of 50mm thickness density of 100kg/m3 is used. However, and upon demand, a rockwool of 100mm thickness and density of 100kg/m3 can be used making the system referred to as NAK GE100.
Joint Insulation
Biosoluble ceramic fiber, with 128kg/m3, allowing a homogeneous heat transfer through the whole pipe
NAK GE50 systems are double wall modular stainless steel flue liner, designated specially to work under elevated temperatures of up to 600C, and high pressure of up to 5000 Pa.
NAK BO50
NAK BO50
Designation: EN 1856-2 – T300 – P1 – W – Vm – L20060 – O50
NAK BO50 systems are double wall modular stainless steel flue liner designated specifically to work under elevated temperatures of up to 300°C, and pressure of up to 200 Pa
NAK BO50 FLUE LINER are produced in sizes from 125mm to 500mm
Inner Wall
The stainless steel AISI type 304L (1.4301) is used with a thickness of 0.6mm or greater
Outer Wall
The stainless steel AISI 304L (1.4301) is used with a thickness of 0.5mm or greater
Insulation between walls:
A Rockwool of 50mm thickness and density of 70kg/m3 is used.
A NAK BO 100 system is also available with a Rockwool thickness of 100mm thickness
NAK BO25
NAK BO25
Designation:: EN 1856-2 – T200 – P1 – D – Vm – L20040 – O70
NAK BO25 systems are double wall modular stainless steel flue liner designated specifically to work under temperatures of up to 200°C, and pressure of up to 200 Pa
NAK BO25 FLUE LINER are produced in sizes from 125mm to 500mm
Inner Wall
Stainless steel AISI 304 (1.4301) with a thickness of 0.4 mm
Outer Wall
Stainless steel AISI 304 (1.4301) with a thickness of 0.4 mm
Insulation between walls:
Rockwool 25 mm thickness / density 70kg/m3
NAK SW
NAK SW
Designation: EN 1856-2 – T400 – N1 – W – Vm – L50060 – O70
NAK SW systems are single wall modular stainless steel flue liner
The system can withstand a temperature of up to 400°C with a natural draught of 40 Pa. they are installed without any sealing and work under natural draught negative pressure
NAK SW FLUE LINER are produced in sizes from 100mm to 350mm
wall
The stainless steel AISI type 316L(1.4404) is used with a thickness of 0.6mm or greater
Product Characteristics
The stainless steel AISI type 316L(1.4404) is used for all combustion material and in all conditions, due to its capacity to resist to acid pitting. The thickness is of 0.6mm or greater.
The ends are fixed by locking bands
Wall
NAK SW+
NAK SW+
Designation: EN 1856-2 – T200 – P1 – W – Vm – L50060 – O50
NAK SW+ systems are single wall modular stainless steel flue liner, supplemented with a seal that assures the joint tightness and is certified to EN 14241-1, the system can withstand a temperature of up to 200°C and a pressure of up to 200 Pa
NAK SW+ flue liners are produced in sizes from 100 mm to 350mm
wall
The stainless steel AISI type 316L(1.4404) is used with a thickness of 0.6mm or greater
Product Characteristics
The Stainless steel AISI type 316L(1.4404) is used for all combustion material and in all conditions, due to its capacity to resist to acids pitting. The thickness is 0.6mm or greater
A mono component neutral silicone T300-W2-K2-LE identified as per EN 14241-1 is used in the temperature range between -60°C and+300°C
NAK OW
NAK OW
Designation:: EN 1856-2 – T400 – N1 – D – Vm – L 20040 – O70
NAK OW systems are single wall modular stainless steel flue liner
The system can withstand a temperature of up to 400°C with a natural draught of 40 Pa. they are installed without any sealing and work under natural draught negative pressure
NAK OW FLUE LINER are produced in sizes from 100mm to 350mm
wall
Stainless steel AISI 304 (1.4301) with a thickness of 0.4mm
Product Characteristics
NAK OW is used for conveying flue gas from open fire places, heating stoves and similar appliances
