SPIRAL SEAM PIPES AND FITTINGS (GALVANISED)
Spiral seam pipes are also called spiral lock pipes. We manufacture the pipes and fittings from galvanised steel sheet or stainless steel (V2A). All fittings are equipped with a rubber lip seal. Both the pipes and the fittings meet tightness class D (the highest class for air ducts). The production of the spiral seam pipes is carried out according to DIN EN 1506 and DIN EN 12237.
To connect two spiral seam pipes, a “spiral seam pipe nipple” is required. This is inserted into the pipes. Fittings (bends, tees, Y-pieces, etc.) are inserted directly into the spiral seam pipe. No additional connector is necessary for this. Two fittings are connected to each other with a “spiral seam pipe coupling”.
Spiral duct for the installation of ventilation systemsSpiral duct ØD = inner diameter [mm]Length 1000 mmMaterial: Galvanised sheet steelDesign in accordance with DIN EN 12237Tightness class D according to DIN EN 1507 (highest class of the standard)Intelmann spiral duct Application areas: The Intelmann spiral duct or spiral seam duct is used for air routing of extract air, outside air, exhaust air and supply air in centralised domestic ventilation or controlled domestic ventilation with heat recovery. The ventilation duct is made of galvanised sheet steel. The diameter refers to the internal diameter of the duct. Connecting the Intelmann spiral ducts in the ventilation system: Nipples or pipe connectors are used to connect the spiral ducts in a ventilation system. Fittings such as bends, branch pieces or T-pieces can be connected directly to the spiral duct. Sockets are used to connect fittings (bends / branch pieces / T-pieces) to each other. A spiral duct is compatible with all other fittings with the same diameter. Two spiral ducts are connected with a nipple.
Elbow for spiral duct Insertion length l = 40mm Galvanised steel 275 g /m² with EPDM double lip seal Tightness class D according to DIN EN 12237, highest tightness class for air ducts The bend is inserted directly into the spiral duct From a diameter of 224 mm, the bend is manufactured as a segmented bend
Product Information „Intelmann® Spiral Duct T-Piece 45° with Seal, Galvanised, DN 80–315“The Intelmann® Spiral Duct T-Piece 45° with Seal enables the professional branching of ventilation ducts in supply and exhaust air systems. The 45° outlet reduces flow losses and supports an even airflow.The integrated EPDM lip seal ensures a permanently airtight connection. The T-piece is directly inserted into the spiral duct and meets the requirements of tightness class D according to DIN EN 1507, the highest tightness class of this standard.Made from galvanised steel sheet, the fitting impresses with high stability, corrosion resistance, and a long service life. It is suitable for use in residential ventilation, air conditioning systems, as well as commercial and industrial ventilation systems.Advantages at a glance✅ 45° outlet for flow-optimised air guidance✅ With EPDM lip seal✅ Tightness class D according to DIN EN 1507✅ Design according to DIN EN 12237✅ Directly insertable into spiral ducts✅ Galvanised steel construction✅ Available in DN 80–315Technical Details✔ Manufacturer: Intelmann®✔ Product type: Spiral duct T-piece✔ Outlet angle: 45°✔ Material: Steel, galvanised✔ Seal: EPDM lip sealStandards✔ Design according to DIN EN 12237✔ Tightness class D according to DIN EN 1507Dimensions✔ Insertion depth: 40 mm per connectionFeatures✔ Airtight connection✔ High dimensional accuracy✔ Robust design✔ Corrosion-protected surface✔ Quick assembly thanks to plug-in systemCompatibility✔ Spiral ducts DN 80–315✔ Ventilation ducts DN 80–315Applications– Controlled residential ventilation (CRV)– Ventilation systems– Air conditioning systems– Commercial ventilation technology– Industrial plants– Supply and exhaust air systemsThe Intelmann® Spiral Duct T-Piece 45° with Seal enables professional branching of ventilation ducts while ensuring high airtightness. The galvanised design, integrated EPDM seal, and tightness class D guarantee a durable and reliable installation.
Product Information „Intelmann® Spiral Duct T-Piece 90° with Seal, Galvanised, DN 80–315“The Intelmann® Spiral Duct T-Piece 90° with Seal enables the professional branching of ventilation ducts in supply and exhaust air systems. The 90° outlet is ideal for right-angled branches within ventilation and air conditioning systems.The integrated EPDM lip seal ensures a permanently airtight connection. The T-piece is directly inserted into the spiral duct and meets the requirements of tightness class D according to DIN EN 1507, the highest tightness class of this standard.Manufactured from galvanised steel sheet, the fitting impresses with high stability, corrosion resistance, and a long service life. It is suitable for use in residential ventilation, air conditioning systems, as well as commercial and industrial ventilation systems.Advantages at a Glance✅ 90° outlet for right-angled pipe connections✅ With EPDM lip seal✅ Tightness class D according to DIN EN 1507✅ Manufactured according to DIN EN 12237✅ Directly insertable into spiral ducts✅ Galvanised steel construction✅ Available in DN 80–315Technical Details✔ Manufacturer: Intelmann®✔ Product type: Spiral duct T-piece✔ Outlet angle: 90°✔ Material: Steel, galvanised✔ Seal: EPDM lip sealStandards✔ Manufactured according to DIN EN 12237✔ Tightness class D according to DIN EN 1507Dimensions✔ Insertion depth: 40 mm per connectionFeatures✔ Airtight connection✔ High dimensional accuracy✔ Robust design✔ Corrosion-protected surface✔ Quick assembly thanks to plug-in systemCompatibility✔ Spiral ducts DN 80–315✔ Ventilation ducts DN 80–315Applications– Controlled residential ventilation (CRV)– Ventilation systems– Air conditioning systems– Commercial ventilation technology– Industrial plants– Supply and exhaust air systemsThe Intelmann® Spiral Duct T-Piece 90° with Seal enables professional branching of ventilation ducts while ensuring high airtightness. The galvanised design, integrated EPDM seal, and tightness class D guarantee a durable and reliable installation.
Nipple for connecting spiral ducts Insertion depth = 40 mm Design in accordance with DIN EN 12237 Tightness class D according to DIN EN 1507 (highest class of the standard) Material galvanised steel
Product Information „Intelmann® Spiral Duct Sleeve (Fitting Connector), Galvanised, DN 80–315“The Intelmann® Spiral Duct Sleeve is used to connect fittings within ventilation and air conditioning systems. It enables the secure connection of components such as bends, T-pieces, branches or reducers and ensures a stable and airtight installation.The sleeve is inserted between two fittings and meets the requirements of Leakage Class D according to DIN EN 1507, the highest leakage class of this standard. The design complies with DIN EN 12237.Manufactured from electro-galvanised steel, the sleeve offers high stability, corrosion resistance and a long service life.Important note:The sleeve is exclusively intended for connecting fittings. It is not suitable for connecting two spiral ducts together.Advantages at a glance✅ Specially developed for connecting fittings✅ Suitable for bends, T-pieces, branches and reducers✅ Leakage Class D according to DIN EN 1507✅ Design according to DIN EN 12237✅ Electro-galvanised steel✅ High dimensional accuracy✅ Easy plug-in assemblyTechnical Details✔ Manufacturer: Intelmann®✔ Product type: Fitting connector / Sleeve✔ Material: Steel, electro-galvanisedStandards✔ Design according to DIN EN 12237✔ Leakage Class D according to DIN EN 1507Dimensions✔ Available nominal sizes: DN 80 to DN 315✔ Insertion depth: 40 mm per sideFeatures✔ Airtight connection of fittings✔ Corrosion-protected surface✔ Robust design✔ High dimensional accuracy✔ Quick and easy assemblyCompatibility✔ Spiral duct bends✔ T-pieces✔ Branch pieces✔ Reducers✔ Other fittings of the corresponding nominal sizeApplication Examples✔ Connecting a spiral duct bend with a T-piece✔ Connecting two ventilation fittings✔ Construction of complex ventilation ductsAreas of Use– Controlled residential ventilation (CRV)– Ventilation systems– Air conditioning systems– Commercial ventilation technology– Industrial plants– Supply and exhaust air systemsThe Intelmann® Spiral Duct Sleeve enables the professional connection of ventilation fittings and ensures a stable, precise and airtight installation. Due to the galvanised design and Leakage Class D, it is suitable for demanding ventilation and air conditioning applications.
Reduction for connecting moulded part with spiral duct Insertion depth = 40 mm Design in accordance with DIN EN 12237 Tightness class D according to DIN EN 1507 (highest class of the standard)
Product information „Intelmann® Sliding Nipple for Length Compensation with Seal, DN 100–250“The Intelmann® Sliding Nipple with Seal is used for flexible length compensation in ventilation ducts and facilitates the installation of spiral ducting and ventilation components. Its adjustable design allows for compensation of dimensional tolerances and precise installation of ductwork.The sliding nipple has no stop bead on one side, enabling the necessary sliding movement for length compensation. The integrated seal ensures a permanently airtight connection and meets the requirements of tightness class D according to DIN EN 1507, the highest tightness class of this standard.Made from galvanized steel sheet, the sliding nipple is suitable for professional use in ventilation and air conditioning systems.Advantages at a glance✅ Ideal for length compensation of ventilation ducts✅ With integrated seal✅ One side without stop bead for flexible sliding✅ Tightness class D according to DIN EN 1507✅ Manufactured according to DIN EN 12237✅ Galvanized steel construction✅ Available in short and long versionsTechnical details✔ Manufacturer: Intelmann®✔ Product type: Sliding nipple for length compensation✔ Material: Steel, galvanized✔ Design: With seal✔ Special feature: One side without stop beadStandards✔ Manufactured according to DIN EN 12237✔ Tightness class D according to DIN EN 1507Dimensions✔ Available nominal sizes: DN 100 to DN 250✔ Length short version: 130 mm✔ Length long version: 300 mmFeatures✔ Airtight connection✔ Compensation of dimensional tolerances✔ Flexible installation of ventilation ducts✔ Corrosion-protected surface✔ Robust designCompatibility✔ Spiral ducting DN 100–250✔ Ventilation ducts DN 100–250Applications✔ Length compensation in ventilation ducts✔ Compensation of installation tolerances✔ Subsequent adjustment of duct sections✔ Connection of ventilation componentsAreas of use– Controlled residential ventilation (CRV)– Ventilation systems– Air conditioning systems– Commercial ventilation technology– Industrial plants– Supply and exhaust air systemsThe Intelmann® Sliding Nipple with Seal enables simple and professional length compensation in ventilation ducts. The airtight design according to DIN standards and the robust galvanized construction ensure a reliable and durable installation.
Reduction for connecting spiral ducts to ducts with smaller diameters Insertion depth = 40 mm Design in accordance with DIN EN 12237 Tightness class D according to DIN EN 1507 (highest class of the standard)
Slide-in backflow flap / internal non-return flap Nominal width 100 mm to 200 mm Opens smoothly, low pressure loss Closes securely, without noise, without rattling The damper is inserted into the ventilation duct For vertical and horizontal installation Housing: Galvanised steel Damper blade: Aluminium Shaft and spring: Stainless steel The non-return damper is used in round ventilation ducts to prevent air backflow. The casing is made of galvanised sheet steel. The damper blades are made of aluminium and the shaft and spring are made of stainless steel. The internal rubber seal reduces noise. The outer foam strip provides a good seal and secures the non-return flap in the pipe. The non-return damper is designed for operation at ambient temperatures up to 60°C, for the transport of clean air, free of coarse dust, grease, chemical vapours and other impurities.
End cap for spiral duct with EPDM lip seal Insertion depth = 40 mm Design in accordance with DIN EN 12237 Tightness class D according to DIN EN 1507 (highest class of the standard)
Collar for spiral duct For connection to a ventilation duct or for connection to a ceiling or wall With EPDM lip seal Insertion depth = 40 mm Design in accordance with DIN EN 12237 Tightness class D according to DIN EN 1507 (highest class of the standard)
Product Information „Intelmann® Spiral Duct Y-Piece (Breeches Piece) 90° with Seal, Galvanised, DN 80–315“The Intelmann® Y-Piece (Breeches Piece) 90° with Seal is used for the flow-optimised merging or splitting of air streams within ventilation and air conditioning systems. Its Y-shaped design reduces air losses and flow noise compared to right-angled branches.The integrated EPDM lip seal ensures a permanently airtight connection and meets the requirements of tightness class D according to DIN EN 1507, the highest tightness class of this standard. The Y-piece is directly inserted into spiral ducts, allowing for quick and easy installation.The design complies with DIN EN 12237 and guarantees high dimensional accuracy as well as compatibility with common spiral duct systems.Advantages at a Glance✅ Flow-optimised air distribution thanks to Y-shape✅ 90° total angle✅ With EPDM lip seal✅ Tightness class D according to DIN EN 1507✅ Design according to DIN EN 12237✅ High dimensional accuracy✅ Quick plug-in installationTechnical Details✔ Manufacturer: Intelmann®✔ Product type: Y-piece / Breeches piece✔ Total angle: 90°✔ Material: Steel, galvanised✔ Seal: EPDM lip sealStandards✔ Design according to DIN EN 12237✔ Tightness class D according to DIN EN 1507Dimensions✔ Available nominal sizes: DN 80 to DN 315✔ Insertion depth: 40 mm per connectionFeatures✔ Airtight connection✔ Flow-optimised design✔ High dimensional accuracy✔ Corrosion-protected surface✔ Robust construction✔ Easy installation via plug-in systemCompatibility✔ Spiral ducts DN 80–315✔ Ventilation ducts DN 80–315Applications✔ Merging of air streams✔ Splitting of air streams✔ Construction of ventilation distributors✔ Extension of existing ventilation systemsAreas of Use– Controlled residential ventilation (CRV)– Ventilation systems– Air conditioning systems– Commercial ventilation technology– Industrial plants– Supply and exhaust air systemsThe Intelmann® Spiral Duct Y-Piece (Breeches Piece) 90° with Seal enables a professional and airtight branching of ventilation ducts. The flow-optimised design, integrated EPDM lip seal and tightness class D ensure an efficient and durable installation in modern ventilation and air conditioning systems.