Spiro-SAFE premium silencer diameter 400 mm - length 1200 mm with core (100 mm insulation) without plug connections

Spiro-SAFE premium sound attenuator diameter 400 mm - length 1200 mm with core (100 mm insulation)

The Spiro-SAFE premium sound attenuator diameter 400 mm - length 1200 mm with core (100 mm insulation) is a round ventilation sound attenuator made of galvanized steel, specifically designed for use in ventilation and air handling ducts. This attenuator is engineered to effectively reduce noise generated by airflow and mechanical fans, ensuring that the sound levels in occupied and technical spaces remain within acceptable limits.
The connection of the sound attenuator features male ends (insertion ends) on both sides with integrated double EPDM lip seals, which guarantee an airtight and reliable connection with round ventilation ducts.

Practical information

Sound absorption is achieved by glass wool positioned between the inner and outer casing of the attenuator. Depending on the model, the wool thickness is 50 mm or 100 mm for the PREMIUM-100. The mineral wool is flexible and cut from roll material, allowing it to conform well to the shape of the attenuator and ensure uniform noise reduction along the entire length of the product. This provides consistent attenuation even at variable airflow rates and smaller duct dimensions.

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

The construction is sturdy and functional, with a tough outer shell capable of withstanding mechanical stress during installation and operation. The product code clearly indicates the type of attenuator, insulation thickness, duct diameter (Ød1), and attenuator length. This makes it easy to select the appropriate attenuator for any ventilation project, from residential to complex commercial applications.

Why is the premium variant superior to the standard variant?

The premium sound attenuator offers several advantages over the standard sound attenuator, making it better suited for certain applications:

1. Wool thickness: The premium sound attenuator uses 100 mm thick mineral wool cut from rolls. This allows the insulation to better conform to the inner shape of the attenuator, ensuring more uniform sound attenuation.
2. Central core: Starting from diameter 315, the premium attenuators are equipped with a central core. This core channels the air through a perforated inner tube, increasing the contact of sound waves with the absorption layer. This results in more effective attenuation, particularly of mid and high frequencies.
3. More uniform noise reduction: The combination of flexible insulation, high-quality sealing, and thoughtful construction enables the premium variant to deliver a more consistent noise reduction across a wide frequency range. The standard variant may exhibit less uniform attenuation, especially at lower frequencies.