SpiroFlex Mufa 250 (oc) coupling M250-OC for duct and pipe connection

SpiroFlex Mufa 250 (oc) coupling M250-OC is designed for connecting round ducts and pipes with a nominal diameter of 250 mm. The coupling provides a mechanical connection that ensures alignment and a continuous airflow path for HVAC and ventilation systems. Suitable for use in residential and commercial installations, this component supports straightforward joining of duct sections while preserving the geometry and airflow characteristics of the duct run.

Advantages

The coupling offers a simple mechanical join that reduces installation time and keeps duct sections aligned without the need for extensive sealing materials. Its construction maintains a smooth internal profile to minimise airflow resistance and helps to preserve airtightness when installed with appropriate sealing methods. The coupling’s design accommodates standard round duct ends and supports reliable mechanical fixation between adjoining sections.

Suitable for

• Connection of round ventilation ducts with 250 mm nominal diameter
• HVAC and air distribution systems in residential buildings
• Commercial ventilation and mechanical exhaust systems
• Repair or modification of existing ductwork runs

Key specifications

• Compatible nominal diameter: 250 mm
• Type: round duct coupling for mechanical connection
• Application: ventilation, HVAC, air distribution
• Function: alignment and mechanical joining of duct sections
• Suitable for use in residential and commercial installations

How to use

Prepare the duct ends by ensuring they are clean, free of burrs and correctly cut to the required length. Slide the coupling onto one duct end and align the adjoining duct section so the coupling fully overlaps both ends. Secure the connection using the recommended mechanical fasteners or clamps and apply a compatible sealing method—such as sealing tape or duct sealant—if airtightness is required. Verify alignment and airflow path before completing the installation.

Usage recommendations

Use the coupling with ducts that match the nominal 250 mm diameter and check that ends are undamaged for proper fit. For installations requiring low leakage, combine the mechanical coupling with appropriate sealing materials and follow local ventilation standards. Periodically inspect connections as part of routine HVAC maintenance to ensure continued performance.