MANDÍK SMRF Duct Silencer

Categories Fire Dampers, Fire Dampers-MANDIK

MANDÍK SMRF Duct Silencer

A fire-resistant, round duct silencer designed for ventilation systems to effectively reduce noise transmission while maintaining critical fire integrity. It combines acoustic performance with an EI30 fire rating, installed between noise sources and protected spaces for a safer, quieter environment.

Product Description

Key Features & Benefits

Noise Reduction + Fire Safety
Dual-function: absorbs ductborne noise while providing EI30 fire resistance.
Fire-Resistant Acoustic Material
Insulation and construction maintain integrity during fire for 30 minutes.
Spiro Design with Blade Seal
Ensures airtight connection and optimal acoustic performance in round ducts.
Space-Efficient Design
Compact 50mm insulation thickness fits standard duct layouts without major modifications.
Wide Diameter Range
Available for round ducts from 80mm to 500mm connection diameter.
Tested & Classified
Fire tested (EN 1366-1), duct leakage tested (EN 12237), acoustic performance verified.

Technical Specifications

Connection Sizes

Round duct diameters: ø 80 mm to ø 500 mm.

Fire Rating

Fire resistance: EI 30 (30 minutes integrity & insulation, no protective distance).

Construction

Design: Spiro with blade sealing. Insulation Thickness: 50 mm.

Performance Limits

Max Air Speed: 12 m/s. Max Pressure Difference: 1500 Pa.

Testing Standards

Fire: EN 1366-1. Duct Leakage: EN 12237. Acoustics: EN ISO 11691.

Variant

SMR: Non-fire resistant version. SMRF: Fire-resistant (EI30) version.

Installation & Application

In-Line Duct Installation

Installed directly in round duct runs, typically downstream of fans or noise sources.

Fire Compartment Placement

Positioned within duct penetrations of fire-rated walls/floors where noise control is needed.

Blade Seal Connection

Ensures quick, airtight spigot connection to standard round ducts without extra sealing.

No Protective Distance Required

EI30 classification is valid without needing clearance from the fire barrier.

Maintenance-Free Operation

Once installed, requires no regular maintenance under normal operating conditions.