Spiro-SAFE silencer diameter 500 mm - length 900 mm (100 mm insulation)

Spiro-SAFE Sound Attenuator Diameter 500 mm - Length 900 mm (100 mm Insulation)

The Spiro-SAFE sound attenuator with a diameter of 500 mm and length of 900 mm (100 mm insulation) is a circular ventilation sound attenuator made from galvanized steel, specifically designed for use in ventilation and air handling ducts. This attenuator is engineered to effectively reduce noise generated by air flow and mechanical fans, ensuring that sound levels in occupied spaces and technical rooms remain within acceptable limits.
The attenuator connections on both ends feature a male connection (spigot end) with an integrated double EPDM lip seal, providing an airtight and reliable connection with circular ventilation ducts.

Practical Information

Sound absorption is achieved by glass wool positioned between the inner and outer casing of the attenuator. Depending on the version, the wool thickness is 50 mm or 100 mm for the PREMIUM-100 model. The mineral wool is flexible and cut from roll material, allowing it to conform closely to the attenuator’s shape and guaranteeing uniform noise reduction along the entire length of the product. This ensures consistent attenuation even with variable air flows and smaller duct dimensions.

The outer casing is made of high-quality galvanized steel to ensure durability and reliability, providing a robust and corrosion-resistant finish.

The construction is sturdy and functional, with a solid outer shell that withstands mechanical stresses during installation and operation. The product code clearly indicates the attenuator type, insulation thickness, duct diameter (Ød1), and attenuator length, simplifying the selection of the appropriate attenuator for any ventilation project — from residential buildings to complex commercial developments.

Why Is the Premium Variant Better Than the Standard Version?

The premium sound attenuator offers several advantages over the standard version that make it better suited for certain applications:

1. Wool Thickness: The premium sound attenuator uses 100 mm thick mineral wool cut from roll material. This allows the insulation to conform more precisely to the internal shape of the attenuator, resulting in more uniform sound attenuation.
2. Central Core: From diameter 315 mm upwards, premium attenuators feature a central core. This core directs the airflow through a perforated inner tube, increasing the contact of sound waves with the absorption layer. This design effectively dampens mid and high-frequency noise.
3. More Uniform Noise Reduction: The combination of flexible insulation, excellent sealing, and thoughtful construction means the premium variant provides more consistent noise reduction across a wide frequency range. The standard version may show slightly less uniform attenuation, particularly at lower frequencies.