Solar Thermal Information

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CALEFFI

Flexible stainless steel insulated piping

SolarFlex

NA3500

Function

SolarFlex is a system solution with pre-insulated flow and return

pipes for solar hot water heating systems used to connect the solar

collector with the storage tank in an easy, quick and professional

way. It optimizes thermal efficiency of the entire system. The pre-

insulation solution of two flexible stainless steel pipes inside two

EPDM closed cell insulation and the integrated sensor cable, saves

time and reduces cost of installation. SolarFlex is packaged in a 50-

foot continuous coil with a complete range of accessories to ensure

a smoothand secure installation.

General

• Easy to install, enabling pipes to be run without using a torch

in confined spaces or on the roof.

• Ensures a leak-free installation.

• Easy to separate, without damaging the tubes.

• External copolymer foil protects against UV radiation

and mechanical strain.

• Identification mark for flow and return.

• Meets highest requirements for modern solar heating systems.

• Pre-insulated feed and return pipes can be joined easily

without special tools.

Technical specifications

Materials:

- pipe: two corrugated stainless steel 316L

- insulation: two closed cell elastomer UV resistance EPDM

- outer cover: UV resistant polyolefin copolymer foil

Insulation thickness: 5/8 inch (16mm)

Thermal conductivity: 0.215 BTU-in/hr-ft

-°F (0.031 W/mK)

Thermal resistance: R-4.2

Max. working pressure: 150 psi (10 bar)

Max. fluid temperature: 350ºF (175ºC)

Min. surface temperature: -60ºF (-50ºC)

Length per coil: 50 feet (15m)

Fluid capacity per foot: 1/2" - 0.0219 gallons (0.08 liters)

3/4" - 0.0346 gallons (0.13 liters)

1" - 0.0509 gallons (0.19 liters)

Min. bending radius: 5 inch (130mm)

Pessure loss:

Approx. 25% more than in a comparable smooth pipe

Flammability: Class VO

Flame spread/smoke density 25/50

Agency approvals: ASTM D 635

ASTM C 177

AB C D

1" 1 - 1/4 " 4 -

7/16

1/2

Code

1/ 2" 11/16 " 4 " 2 "

NA3520 - 15

NA3560 - 15

Weight (lb/f)

3/4" 15/16 " 4 -

3/8

1/8

NA3540 -15

0.5

0.4

0.7

Product range

NA3520-15 1/2" SolarFlex pipe 50' coil including (2) double nipples, (4) union nuts, 4 segment rings and 4 washers

NA3540-15 3/4" SolarFlex pipe 50' coil including (2) double nipples, (4) union nuts, 4 segment rings and 4 washers

NA3540- B 3/4" SolarFlex pipe bulk cut to length up to 164 foot. Without connection fittings.

NA3560-15 1" SolarFlex pipe 50' coil including (2) double nipples, (4) union nuts, 4 segment rings and 4 washers

Dimensions