Ducts - Import export

Pressed bends are designed for building ventilation systems based on spiral and plain ducts. Seam welds provide air tightness class D without the need to use any other sealants. In ventilation and heat recuperation systems, the double EPDM gasket provides air tightness class D according to EN 12237. The piece is connected with a duct by inserting one into the other. The pressed form of the ventilation piece helps to reduce the flow resistance and the pressure loss.

The HomEvap adiabatic humidifier is designed for domestic mechanical ventilation systems with a maximum airflow 600 m3/h. Filtered water (Legiosafe®) naturally evaporates on a special matrix, and then the humidified air is distributed to the ventilation duct system and to the connected rooms. The humidification process is regulated by a wireless room controller and a duct sensor. Builtin PTC heater compensates for temperature losses caused by the evaporation process. The housing is made of EPP, while the matrix is made of fiber glass.

Round plastic ventilation pipes are joined by welding (or PVC gluing up to ø250). Manufactured in accordance with DIN 8062 standards for ventilation pipes. PVC pipes of larger diameter than 500mm are made of sheets. Pipes made of PP, PPs, PE and PPELs are extruded. Other wall thicknesses are available on request.

SPRZSMO SMOKE system spiral circular duct, fire resistance classE600 120 (ho) S1500 single, designed for singlecompartment smoke extraction systems and combined (dualfunction) systems. Made of galvanized steel sheet DX51D+Z275 according to PNEN103462011, thickness 0.7mm for diameters from 100710mm, 0.9mm for diameters from 8001000mm. The maximum length of a straight duct is 6000mm. Spiral ducts meet the requirements of airtightness class D in accordance with PNEN 12237. In the whole range of diameters they are made as spiral lockseamed ducts made of 137mm wide sheet metal sheet, additionally, from the diameter of 250 to 1000mm, they are corrugated;

Plug ends are pressed with a male end on the duct side to blind it at air tightness class D. The plug end rim is long enough to easily secure it with WGO screws without any risk of cutting the gasket's double lip. CPSL plug ends are equipped with a stop fold which prevents inserting the fitting too deep into the duct. Safe edges (rolled edges) allow the duct installer safer installation of the ductwork, by minimizing the possibility of cuts.

Round spiral ducts are available in diameters from 80 mm to 1600 mm. The ducts are available as made of 0.4 mm to 1.8 mm thick metal sheet; the ducts in diameters of DN 160 mm or greater are also available with corrugation for improved stiffness and vacuum strength. The corrugations are available as a standard feature for diameters of DN 250 mm to DN 1600 mm. All spiral ducts made from galvanized steel sheet, stainless steel sheet or aluminium sheet meet requirements of air tightness class D according to EN 12237.

Round spiral ducts are available in diameters from 80 mm to 1600 mm. The ducts are available as made of 0.4 mm to 1.8 mm thick metal sheet; the ducts in diameters of DN 160 mm or greater are also available with corrugation for improved stiffness and vacuum strength. The corrugations are available as a standard feature for diameters of DN 250 mm to DN 1600 mm. All spiral ducts made from galvanized steel sheet, stainless steel sheet or aluminium sheet meet requirements of air tightness class D according to EN 12237.

longitudinal welding with overlap pipe for transporting air and dust. TRANSQuick system is made of galvanised steel sheet, 0.7 and 0.9 mm in thickness. Depending on the wall thickness there are available various lengths 0.7 mm thickness L=500 / 1000 / 1480 mm. 0.9 mm thickness L=500 / 1000 mm

The standard duct length is 3000 mm; the sheet thickness for a given diameter is the same as that for the SPR spiral coiled ducts. The ducts of diameter 250 mm or greater feature outer ribbing to improve the robustness and vacuum pressure strength.

FLXHDPE and FLXHDPEA plastic ducts are used to air distribution in domestic ventilation systems. Relatively small diameters allow to hide the installation in ceilings, screeds or suspended ceilings. FLXHDPE and FLXHDPEA semirigid ducts are connected to other system components like plenum boxes or distribution boxes with a simple push fit connection. Application of seals on the FLXPLO plenum boxes’ spigots guarantees high air tightness system. FL XHDPE and FL XHDPEA semirigid ducting is made of highimpact polyethylene. This makes the entire ventilation ductwork very durable. FLXHDPEA ducts are complying with European norm EN 171922018 for rigid or semirigid nonmetallic ductwork, which defines the test methods and performance characteristics like airtightness, pressure drop, reaction to fire, resistance to external pressure , thermal resistance and microbial resistance. FLXHDPE75 semirigid ducts without an antibacterial coating are gray.

ILA maleend flexible duct connectors are used for joining two round SPIRAL or plain ducts. They are most often used for connecting air handling units, heat recuperation units, and duct fans. The flexible duct connector deadens the vibration generated by the equipment to prevent vibration and noise in the ductwork and ensure improved acoustic performance of the ventilation system. The flexible piece is made from AMT balancing tape, a standalone product available in different sizes and materials, including a heatresistant version. The standard version is male. The femaleended version is available on request for connecting two fittings.

The SLEFL flexible silencer is made of the Alnor Flex perforated duct. The sound insulating layer is 25 mm thick and clad in aluminium and polyester. The silencer is connected to the ductwork with male flanges made of metal. The product is available in two length sizes, 600 mm and 1200 mm. Other silencer versions are available on request with EPDM gaskets, female flanges, or in other length sizes. Insulation Insulation material glass wool. Insulation type trimmed from reel, flexible. Temperature range 20°C to +140°C Thermal insulation performance of mineral wool λ = 0.034 W/mK at 24°C Pressure drop See the enclosed diagram. Fire resistance The silencers are made from fireproof materials.

The IPR access door features a CR EPDM gasket and it is designed for installation on round duct walls. The design of the IPR access door and its gasket profile provide a perfect seal around the duct opening. This ensures a high air tightness class. The product provides a very simple, lowcost and extremely effective solution for closing and sealing access openings in the ductwork. The openings made in the ductwork for access doors must be sized to meet the requirements of EN 12097. Another determinant of the access opening size is how the interior is cleaned. Some cleaning processes and tools require access doors as large as 800x400 mm. The access door is installed in the opening made using the cutting template supplied with the product.

The SLC and SRC rectangular duct silencers reduce the noise level in ventilation and A/C systems. This silencer type is usually installed between a fan and an air supply or exhaust duct, and upstream of air supply vents. All silencers are made of a housing and inner baffles. The housing is made from galvanized steel sheet and its ends are framed with steel sheet angles. All baffles inside the silencer have a round breast at one end and comprise a galvanized steel frame with a soundinsulating insert which absorbs the acoustic energy from the air flow. The soundinsulating insert is a set of nonflammable mineral wool panels. The outer surface of the soundinsulating insert is lined with a special abrasionresistant textile to protect the mineral wool from wear and tear. The mineral wool panels are finished with a glass fibre lining in black; this lining is suitable for systems with a maximum air flow rate of 20 m/s.

The silencers are delivered with the SPIRAL® system seals in the standard version. The diameter sizes d1 > 315 mm require ordering the NSL male couplings which need to be installed in the silencer before connecting the silencer to the ductwork. The male fittings are available separately. They are not delivered with the silencers. Glass wool thickness inside the silencer 50 mm for SIL50 depends on the outer cladding size. 100 mm for SIL100 depends on the outer cladding size. Insulation Insulation material glass wool. Insulation type trimmed from reel, flexible. Reaction to fire A1 acc. to EN 13162

The insulated manifold box is used for mechanical ventilation systems with heat recovery (MVHR). MVHR manifolds do not need to be insulated onsite thanks to the insulating properties of EPP. Manifold boxes are designed for distribution of 75mm semi-rigid ducting around. The number of connectors varies depending on the user's specifications: 6-13 connection spigots.

EPP manifold boxes are used for heat recovery ventilation (MVHR). Due to EPP's insulating properties, MVHR manifolds do not need to be insulated. Manifold boxes are intended to distribute 75mm ducting around the house. The number of connectors varies based on the specifications of the user: 4-18 spigots.

Base Group specializes in the manufacturing different types of steel constructions for energy. We are manufacturer of high quality steel structures for the energy sector in accordance withall standards and legal regulations. We produce in accordance with ISO 3834-2, PN EN 15085, PN EN 1090 and ISO 9001:2015. Our knowlage and experiance has made us a provider of the word-leading company on the global market of electric power production and transmission.