R-Flex Submittal

R-flex is a multi-layered insulated piping system consisting of cross-linked
SDR-9 (1" only) or SDR-11 PEX barrier pipe, multiple PE foam insulation
layers, and an outer dual wall corrugated casing. R-flex is engineered for
exterior hydronic heating and cooling applications and is
not intended for
interior or potable applications. R-flex tubing features an integral DIN
4726 standard oxygen barrier that limits oxygen diffusion through the pipe
wall to less than 0.10 g/m3/day at 104°F water temperature and is
available in single or dual pipe configuration.
Specifications
Insulation thermal conductivity
0.0211 Btu/hr sq ft °F (0.0365 W/m
°K). Insulation water absorption after
28 days less than 1.04% volume.
System shall be installed using Watts
Radiant Single or Dual R-flex. All
connections shall be made using Watts Radiant's R-flex Compression
fittings in accordance with all corresponding installation guidelines.
Installation Parameters
R-flex must be installed in accordance with all Watts Radiant installation
procedures, including information provided in the R-flex installation manual
and guidelines.
Features
R-flex is available with either Single or Dual PEX pipes. The inner
insulation layer is constructed of flexible, water resistant, extruded PE
foam encased in a unique dual layer corrugated outer casing. This dual
layer provides enhanced flexibility while preventing water penetration.
In the event the outer layer is damaged, the inner layer still protects
the insulation from water penetration - preventing a potential increase
in heat loss.
Applications
R-flex can be used for hydronic heating, hydronic snow melting, district
heating, commercial and process piping, cooling towers and chilled water
systems, geothermal, agricultural piping, biomass heat sources, wood-fired
boilers, solar, and more.
For Residential or Commercial Radiant Heating and Snow Melt Applications
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R-flex
™
Flexible Insulated PEX Pipe for hot or chilled water
Sizes: 1" (25.4 mm)
32 mm (1.3")
40 mm (1.6")
50 mm (2.0")
63 mm (2.5")
75mm (3.0")
90mm (3.5")
110mm (4.3")
Operating Temperature & Pressure
Max. Temperature Max. Pressure
200ºF (93.3ºC) 80 psi (5.5 bar)
180ºF (82.2ºC) 100 psi (6.9 bar)
73.4ºF (22.7ºC) 160 psi (11.0 bar)
Dual Wall Outer Jacket
PE Foam Insulation
PEX Pipe
Fluid Channel
R-flex consists of a barrier PEX pipe, PE foam insulation,
and a dual wall external protective casing.
Pex Tubing Standards and Listings
1inch pex tubing is certified to ASTM F876,
SDR-9 dimensions.
All other pex tubing manufactured in accordance to DIN
standards for Testing and Materials (DIN 16892 and 16893).
DIN
Insulation Thickness
Insulation Between Pipes
PEX ID PEX OD Jacket OD
ES-WR-RFlex
N
O
T
F
O
R
P
O
T
A
B
L
E
U
S
E
Watts Radiant product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please
contact Watts Radiant Technical Service. Watts Radiant reserves the right to change or modify product design, construction, specifications, or materials without
prior notice and without incurring any obligation to make such changes and modifications on Watts Radiant products previously or subsequently sold.
Watts Radiant is an ISO 9001-2008 approved facility.
!
CAUTION
This Engineering Sheet is not intended to provide full installation
instructions and safety information. In order to avoid property
damage or injury, please refer to the complete installation manual
and product safety information provided with the product.