Danfoss FH PEXa Pipes Data sheet
Data Sheet
FH PEXa Pipes
Application
Ordering
They can be cold bent and curved very easily and
without special tools, saving joints and installation
time.
The EVOH oxygen anti-diffusion barrier is a thin layer
of ethylene vinyl alcohol copolymer which prevents
permeability of the pipe to oxygen diffusion. This
construction eliminates problems with addition of
oxygen to the flow water and the resulting corrosion
of metal parts in the installation, extending the
working life of the whole installation.
The Danfoss PEXa pipe is a high qualit y floor heating
pipe with an EVOH oxygen barrier. All layers are
permanently bonded with each other during the
production process.
PEX-a (peroxide) pipes give greater flexibility than
PEX pipes cross-linked by other systems.
Product Size (mm) Length Code no.
FH PEXa pipes 14,0 × 2,00 240 m 088X0950
FH PEXa pipes 16,0 × 2,00 120 m 088X0951
FH PEXa pipes 16,0 × 2,00 240 m 088X0952
FH PEXa pipes 16,0 × 2,00 400 m 088X0969
FH PEXa pipes 16,0 × 2,00 600 m 088X0953
FH PEXa pipes 16,0 × 2,20 240 m 088X0954
FH PEXa pipes 18,0 × 2,00 240 m 088X0957
FH PEXa pipes 18,0 × 2,00 600 m 088X0958
FH PEXa pipes 20,0 × 2,00 120 m 088X0959
FH PEXa pipes 20,0 × 2,00 400 m 088X0961
FH PEXa pipes 25,0 × 2,30 200 m 088X0963
5-layer piping made of cross-linked polyethylene
and produced by the peroxide method, with oxygen
anti-diffusion barrier, according to the requirements
of European standard EN 1264-4. Pipe cross linking
degree >70 % according to ISO 15875.
Accessories
© Danfoss | FEC | 2021.09
Product Connection Size Code no.
16,0 × 2,0 mm 088X1030
Screw coupling
20,0 × 2,0 mm 088X1031
16,0 × 2,0 mm 088X1032
Press coupling
“TH” jaw profile.
18,0 × 2,0 mm 088X1033
20,0 × 2,0 mm 088X1034
* We recommend to use compatible “TH” jaws profile from the suppliers: Novopress, Rems and Klauke.
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Data Sheet FH PEXa Pipes
Accessories
Technical specifications
Product Connection Size Code no.
14,0 × 2,0 mm 013G4144
G ½” A,
external thread
external thread
16,0 × 2,0 mm 013G4146
14,0 × 2,0 mm 013G4154
16,0 × 2,0 mm 013G4156
G ¾”,
internal thread
internal thread
16,0 × 2,2 mm 013G4163
18,0 × 2,0 mm 013G4158
20,0 × 2,0 mm 013G4160
Materials PEXa / EVOH
Max. working pressure 6 bar
Max. flow temperature (Short term) 110 °C
Max. working temperature 95 °C
Oxygen barrier EVOH
Linear expansion coefficient 1,4 × 10-4 K
Thermal conductivity λ = 0,41 W/m K
Oxygen-tightness according to DIN 4726 < 0,1 g/m³ × d
Colour Natural
-1
Working conditions
Minimum bending radius
with bending springs
2 | © Danfoss | FEC | 2021.09
Temperature Time Safety Factor
20 °C 50 years 1,5 18 bar 19,8 bar
40 °C 50 years 1,5 14 bar 15, 6 bar
60 °C 50 years 1,5 11 bar 12,4 bar
70 °C 25 years 2,0 7 bar 8,4 bar
95 °C 25 years 2,0 5 bar 6,4 bar
Pipe dimension Manual pipe bender radius
16 mm 80 mm (5 × outside diameter)
20 mm 100 mm (5 × outside diameter)
25 mm 125 mm (5 × outside diameter)
Normal Reinforced
Pressure
AI294453823003en-000701
Data Sheet FH PEXa Pipes
10000
23
100 1000
Pressure loss
Mass flow, kg/h
8000
6000
4000
2000
1000
800
600
400
200
100
80
60
40
Flow velocity (m/s)]
0.1
0.2
Ø 32 /26 mm
0.3
Ø 25/ 20 mm
Ø 26/ 20 mm
Ø 20/16 mm
Ø 20/15 mm
0.4
Ø 18 /14 mm
Ø 17/13 mm
Ø 16 /12 mm
0.5
Ø 14 /10 mm
1.0
0.9
0.8
0.7
0.6
20
10
1 2 3 4 5 6 7 8 9 10
Water temperature: 40 °C.
1
2 3 4 5 6 7 8 9 10
Pressure loss, kPa/m
2 3 4 5 6 7 8 9 10
© Danfoss | FEC | 2021.09
AI294453823003en-000701 | 3
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