Solar thermal energy

100% „Made in Germany“

All-year highly efficient high-vacuum tube collectors


DF (Direct Flow) collector systems

Based on their hydraulic properties, DF collectors are able to be integrated on any building (pitched roof, facade or even free standing). The s-power collectors are used for solar drinking water, pool heating, furnace support and process heat. The s-power DF tubes carry a coaxial heat-extraction-pipe (pipe within a pipe). The to be heated heat-carrier-fluid runs from the header through the inner pipe towards the lower part of the vacuum tube and then through the outer pipe (outer heat pipe) back towards the header. On its way back to the header, the heat is transferred from the outer pipe, which is connected to the absorber, onto the heat-carrier-fluid. All vacuum tubes are axial adjustable towards the sun and can be individually exchanged. The innovative plug-in connection system of the tubes allows them to be fast and securely assembled inside the header. Their modular concept allows the collectors to be fast and easy installed onto the building.

The s-power DF (Direct Flow) collectors are „real“ all seasons systems with exceptional yearly solar earnings (kW/m²/a). They therefore set new standards in the area of diffuse irradiation. The one-of-a-kind anti-reflex-coating (nano-coating) applied onto the inner and outer side of the glass tube allows for an extraordinary high light transmission (~97%), a very low light reflection (~3%) and therefore outperforms all standards so far. The high performance-copper-absorber, which is coated with Titan-Nitrid-Oxide (TINOX), absorbs the sunlight highly effective. (~96%). The absorber is welded onto the heat-carrier-pipe using ultrasound-welding. The patented, innovative glass-metal connection grants for highest quality measures (10 years warranty by the manufacturer). The glass-metal connection seals the glass tube to preserve the high-performance-absorber-unit enduringly under a vacuum of 10-5 mbar (100% Insulation).

> Download: Technical datasheet (english version, PDF-Format, 732 KB)

Product advantages:

  • Vacuum tube collector „Made in Germany“
  • featuring the NARVA High-Performance-Vacuum tubes „Made in Germany” labeled with the OTTI-Innovation award of 2008.
  • High performance due to the anti-reflex coating on the basis of nano-particles and high selective absorber surface.
  • • Hail and impact resistance certified by TÜV - Rheinland Group based on DIN EN 12975-2.
  • • Patented glass-metal-connection (by highly experienced glass manufacturer) protects the vacuum permanently.
  • 10 years warranty for vacuum by the manufacturer.
  • Tube connection via plug-in principle of Direct Flow.
  • Tubes are able to be rotated and individually angled.
  • Consistent tube distance when mounting more then one module together.
  • Low weight
  • Low fluid volume
  • Shortest energy amortization
  • Amortization of purchase cost within 6-8 years possible.
  • Simple installation due to s-power mounting-and connection systems.

 

 

Here you can find all the components, data and article numbers of our direct flow  collector systems.
 
Underneath are detailled descriptions of our products. For further information you can contact our technicians: 0049 5931 88 0 88 98.

 

 

Art.-No.: 79 22 50

Collectorsystem DF 10

for 10 DF vacuum tubes

Consisting of:

  • Silver-gray anodized collector header system with connection of DF vacuum tubes through self-locking connector. Silver-gray anodized footer, for a safe capture and fixation of the DF vacuum tubes.
  • Collector attachments and connections

Art.-No.: 79 22 70

Collectorsystem DF 20

Collectorsystem DF 20

Consisting of:

  • Silver-gray anodized collector header system with connection of DF vacuum tubes through self-locking connector.
  • Silver-gray anodized footer, for a safe capture and fixation of the DF vacuum tubes.

Collector attachments and connections

Art.-No.: 79 22 72

Collectorsystem DF 30

Für 30 DF Vakuumröhren

Consisting of:

  • Silver-gray anodized collector header system with connection of DF vacuum tubes through self-locking connector.
  • Silver-gray anodized footer, for a safe capture and fixation of the DF vacuum tubes.
  • Collector attachments and connections

Art.-No.: 79 22 10

Collectorsystem side cover set DF

Consisting of:

  • 4 x side cover
  • 12 x screw‘s for side cover

Art.-No.: 79 22 10

Collectorsystem side cover set DF

Consisting of:

  • 4 x side cover
  • 12 x screw‘s for side cover

Art.-No.: 79 10 29

Collector stabilizer set

for DF and HP collectors for additional stabilization between header and footer. Recommended for high snow loads, horizontal tube assembly and horizontal collector assembly on flat roofs.

Consisting of:

  • 2 x aluminum square tube (19x19, 2000 mm long)
  • 1 x screw set

Art.-No.: 78 79 00

Vacuum Tubes DF Power Plus

Packaging unit: 10 pcs.

Consisting of:

  • 10 x 2000 mm Vacuum tube DF, coaxial, à 110Wp,
  • Absorber fin coated on both sides
  • with connector

Art.-No.: 78 78 90

Vacuum Tube DF Power Plus

  • 2000mm, coaxial, 110Wp
  • Absorber fin coated on both sides
  • with connector

Art.-No.: 78 80 00

Vacuum Tubes DF Power

Packaging unit: 10 pcs.

Consisting of:

  • 10 x 2000 mm Vacuum tube DF, coaxial,
  • à 80Wp, Absorber fin coated on one side
  • with connector

Art.-No.: 78 78 80

Vacuum Tubes DF Power

Packaging unit: 10 pcs.

Consisting of:

  • 10 x 2000 mm Vacuum tube DF, coaxial, à 8Vacuum Tube Power DF
    2000 mm, coaxial, 80 Wp, Absorber fin coated on one side
  • with connector 0Wp, Absorber fin coated on one side
  • with connector

Art-No.: 79 10 32

Collector mounting set

for DF and HP collectors. Serves for mounting elevation racks on pitched roofs or direct collector mounts in areas with high snow loads. (> 2.5 kN/m2)
For screwing to the rafters to DIN 1055.

Contents: 4 pcs.

(for one collector DF or HP)

Art-No.: 79 10 25

Collector mounting set

for DF and HP collectors. Serves for collector installations on pitched roofs. To attach to the roof battens or mounting onto the lower roof.
Suitable for: pans, beaver, slate and shingle.

Contents: 4 pcs.

(for one collector DF or HP)

Art.-No.:79 10 03

Elevation rack for flat roofs

Consisting of:

  • 2 x shearing mounting rails
  • 1 x cross brace
  • 4 x stainless steel U-bracket
  • 1 x mounting screws

Art-No.: 79 10 06

Elevation rack for flat roofs

Consisting of:

  • 2 x shearing mounting rails
  • 1 x cross brace
  • 4 x stainless steel U-bracket
  • 1 x mounting screws

Art.-Nr.: 79 10 34

Stehfalzklemmenset

zur direkten Kollektormontage DF und HP oder zur Montage von Aufständerungsgestellen auf Stehfalzblechdächern.

Bestehend aus:

  • 4 x Blechfalzklemme aus V4 A inkl. Schrauben
  • (für Art.Nr. 79 10 03, 79 10 06) 

Art.-No.: 79 12 65

Collector connection set DF with sensor connection

For the connection of one collector row DF with flexible corrugated hose for roof penetration.

Consisting of:

  • 2 x stainless steal corrugated hose 850 mm DN 16 with insolation and tissue sheet for damage protection
  • 1 x collector connector DF with sensor connection and shrink tubing fixation.

Art.-No.: 79 12 66

Collector connection set DF without sensor connection

For the connection of an additional collector row DF with flexible corrugated hose for roof penetration.

Consisting of:

  • 2 x stainless steal corrugated hose 850 mm DN 16 with insolation and tissue sheet for damage protection
  • 1 x collector connector DF without sensor connection

Art.-No.: 79 12 67

Collector connection set DF with sensor connection

For the connection of a collector row DF with rigid piping, 18 mm for a fixed piping.

Consisting of:

  • 2 x CU connection tube 18 mm length: 100 mm with insolation
  • 1 x collector connection DF with sensor connection and shrink tubing fixation

Art.-No.: 79 12 68

Collector connection set DF without sensor connection

For the connection of a collector row DF with rigid piping, 18 mm for a fixed piping.

Consisting of:

  • 2 x CU connection tube 18 mm length:100 mm with insolation
  • 1 x collector connection DF without sensor connection

Art.-No.: 79 43 00

Air remover set

for the fixed piping of a collector row beneath the roof.

Consisting of:

  • 1 x air remover
  • 1 x tubing set

Art.-No.: 78 78 92

Vacuum Tube DF

  • Sample tube 800 mm
  • coaxial, 44Wp,
  • Absorber fin coated on both sides

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