Circular attenuators MCA - MCPA MCA and MCPA circular attenuators are products with top level acoustic performances, great manufacturing features and low pressure drops. They are suitable for installation on circular ducts in conditioning and ventilation systems or directly on axial fans. There are two different models for these attenuators: • MCA without central core, length equal to one or two diameters (respect. MCA-1D or MCA 2D) • MCPA with central core, length equal to one or two diameters (respect. MCPA-1D or MCPA 2D) Attenuator models with core have a higher noise attenuation capacity compared to the models without core. Standard production is in galvanized steel sheet; the acoustic insulation material is made of special mineral fiber protected by perforated sheet. There are threaded inserts on the heads for installation on the flanges of the ducts. On request we can make special models in aluminum or stainless steel, fitted with a protective polyester membrane. Applications MCA - MCPA circular attenuators can be applied on the circular ducts of civil and industrial conditioning and ventilation systems; another specific application foresees installation on swirl fans of “roof-top” condensation sets. New MCTA series for evaporative towers with core and Melinex. They are an almost necessary feature for ducted axial fans. Installation They are installed by using the threaded inserts on the two heads, in line with the duct flange. Installation operations are fast and easy. Technical draft Nominal diameter (mm) Special models HOSP with protective polyester membrane CAVILEN - MELINEX and perforated sheet, 5% price increase MCTA series flat head CORE, 3% increase Aluminum, stainless steel: prices upon request

Circular attenuators MCA - MCPA Acoustic performances N.B The pressure drop value is considered only for MCPA models, because MCA models present minimal resistance.

In line circular sound attenuators MCA / IN LINETechnical features Product MCA / IN LINE Construction material external housing Galvanized steel Construction material internal housing Galvanized microstretched steel Fonoabsorbent material Glass fiber Antidust protection Veloglass Connections Direct clutch collars in galvanized steel 30 mm length Fire class Class 1 Circular sound attenuator in galvanized steel and glass fiber fonoabsorbent material, perforated sheet protection, fire reaction class 1. A semirigid circular sound attenuator PAS series is also available (ref....

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