FLEXIBLE DUCTS
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FLEXIBLE DUCTS OVERVIEW MANUFACTURING CHARACTERISTICS OVERVIEW : The new range of flexible ducts in aluminium polyester part of the TT series, form a wide range of accessories for the distribution and connection of the principal aeraulic network with the end terminals in HVAC systems. The use of these flexible ducts allow an easy, rapid and economic installation in the different types of civil and industrial systems, satisfying the latest and most recent Italian fire prevention normatives, both in public and private dwellings. The TT series range has been devised to satisfy different usage requirements and more precisely: - TT4/TT6 Used in the extraction or conditioning of air, satisfies the requirements of robustness to tractioning and against and tearing. The insulation against vapour and condensation in all those cases where the Fire Class 1 is requested. - TT3 Used in the extraction or conditioning of air, satisfies the requirements of robustness to tractioning and against tearing in all those cases in which the Fire Class 1-1 is requested. Available antibacterial type for hospitals. IMPORTANT: For flexible ducts have not yet issued a European standard that will allow the euro-class fire classification classification. Consequently: they are certified according to Italian standards and lows; they cannot be marked CE. Before performing installations outside of Italy, it is urged to deepen the legal and regulatory aspects with local engineers to avoid job-related disputes. - TT7 Used in the extraction or conditioning of air, satisfies the requirements of robustness to tractioning and against and tearing. The insulation against vapour and condensation in all those cases where the Fire Class 1 is requested. - TT8 Used in the extraction or conditioning of air, its main characteristic is the insulation in polyester and satisfies the - TT0 Used in the extraction or conditioning of air, satisfies the requirements of robustness to tractioning and against and requirements of robustness to tractioning and against tearing. tearing. The insulation against vapour and condensation in all The insulation against vapour and condensation in all those those cases where the Fire Class 1 is requested. cases where Fire Class 0 is required. Available antibacterial type for hospitals. - TT10 Used in the extraction of air, is characterized by the - TT1 Used in the extraction or conditioning of air, satisfies the structutre in polyester mesh covered both sides with film in requirements of robustness to tractioning and against tearing. PVC. Satisfies the requirements of robustness to tractioning and against and tearing, suitable in all those cases in which the The insulation against vapour and condensation in all those Fire Class 1 is requested. cases where Fire Class 1-1 is required. Available antibacterial type for hospitals. - TT11 Used in the extraction or conditioning of air, is - TT2/TT02 Used in the extraction or condition of air, satisfies characterized by the structutre in in polyester mesh covered the requirements of mechanical resistance, insulation against both sides with film in PVC insulated by a polyester mat and vapour and condensations with a specific and aimed reduction by an external jacket in polyetylene. Satisfies the requirements in noise produced by a micro puncture in the main internal of robustness to tractioning and against and tearing, suitable duct in all those cases where the Fire Class 1-1 or Class 1 is in all those cases in which the Fire Class 1 is requested. required. (*) (*) Class 1-1 and Class 1 are equivalent. he attribution of one or the other depends on the date of certification GREENGUARD The flexible ducts with internal in alluminium TT0 - TT1 - TT2 - TT3 have obtained classification of products with low release GREENGUARD Indoor Air Quality Certification e GREENGUARD Children and School Certification Those ducts so brovide te maximum salubrity of the air inside the rooms. GREENGUARD GREENGUARD Indoor Air Quality Certification Children and School Certification Total Volatile Organic Compound ≤0,5 mg/m³ ≤0,22 mg/m³ ≤0,01 threshold limit value Individual Volatile Organic Compound ≤0,1 threshold limit value ≤0,5 chronic reference exposure level Formaldeide ≤0,05 ppm ≤0,0135 ppm Total Aldeydes ≤0,1 ppm ≤0,043 ppm Total Phthalates --≤0,01 mg/m³ Total particles ≤0, 5 mg/m³ ≤0,02 mg/m³

FLEXIBLE DUCTS OVERVIEW MANUFACTURING CHARACTERISTICS BUILD CHARACTERISTICS: Insulated flexible duct TT 0 Made with an internal duct consisting of an harmonic steel spiral wrapped by two multilayer laminates aluminum/polyester 74µm. Insulating mat made of glass-fiber density 18 kg/m³ and thickness 25 mm. External cover in aluminum/polyester 49µm. Available in antibacterial for hospital use. Reaction to fire class 0 Certified CSI 0274/04/RF Approval PD2229NNNNN000005 Insulated flexible duct TT 1 Made with an internal duct consisting of an harmonic steel spiral wrapped by two multilayer...

FLEXIBLE DUCTS OVERVIEW MANUFACTURING CHARACTERISTICS EXTERNAL JACKET Alluminium polyester Alluminium polyester Alluminium polyester Alluminium polyester Alluminium polyester Alluminium polyester Alluminium polyester Alluminium polyester USAGE TEMPERA TURES MAXIMAL PRESSURE FLEXIBLE DUCT TT 2 -TT02 - ACOUSTIC CHARACTERISTICS : Acoustic reduction (dB) [Lw1 - Lw3] Frequency [Hz] By acoustic reduction is meant the difference between the values at the top and at the bottom of the duct. Acoustic absorption (dB) [Lw1 - Lw2] Frequency [Hz] 102 By acoustic absorbtion is meant 127 the difference...

FLEXIBLE DUCTS TECHINCAL CHARACTERISTICS The pressure drops in the bends are calculated using the "equivalent length" method, i.e. the length of a linear duct with pressure drops equal to the bend (refer to the table alongside). The equivalent length can be taken from the table alongside:. Example : Given a flexible pipe measuring 4 m, with a rated diameter of 203 mm, with a 90° bend and R/D=1, establish the overall pressure drop for an airflow of 580 m3/h. From the table: equivalent length = 2.03 m total length = 4 + 2.03 = 6.03 m from the diagram: air speed: 5 m/s pressure drop per 1 m: 3...