SpiroFlex stainless steel 90° branch fitting SpiroFlex 130 (model SX-WN130T)

The SpiroFlex stainless steel 90° branch fitting SpiroFlex 130 (model SX-WN130T) is a round duct accessory designed to form a perpendicular branch from a main circular ventilation or air-conditioning run with a nominal diameter of 130 mm. Constructed from stainless steel, the fitting provides a corrosion-resistant junction suitable for indoor HVAC systems where a compact, right-angle split is required. The shape and dimensions match standard round ducting to ensure straightforward integration into existing duct networks.

Advantages

This stainless steel 90° branch fitting offers durable corrosion resistance and mechanical stability for long-term indoor use. Its round-to-branch design simplifies installation and reduces the need for additional fabrication, while the smooth internal surface supports efficient airflow and minimizes pressure loss at the junction. The fitting’s standardized diameter compatibility ensures reliable mating with common 130 mm round ducts.

Suitable for

• Creating a perpendicular branch connection from a 130 mm main round duct
• Indoor ventilation and air-conditioning ductwork in residential and commercial buildings
• HVAC installations requiring corrosion-resistant fittings in moist or temperate environments

Key specifications

• Material: stainless steel for corrosion resistance and mechanical strength
• Type: 90° branch (right-angle) fitting for round ducts
• Nominal diameter: 130 mm for the branch connection
• Application environment: indoor HVAC systems including ventilation and air conditioning

How to use

Position the branch fitting at the chosen location on the main 130 mm duct run and ensure surfaces are clean and free from debris. Align the branch outlet at a 90° angle relative to the main duct axis, then secure the fitting using appropriate fasteners or clamps compatible with stainless steel assemblies. Seal joints with suitable duct sealant, gasket, or tape to maintain airtightness and prevent leakage. Verify alignment and secure mounting before connecting additional duct sections to the branch outlet.

Usage recommendations

For optimal airflow and reduced pressure loss, avoid placing the branch fitting immediately next to bends or other fittings that disturb flow. Use compatible stainless steel fasteners and an approved HVAC sealant to preserve corrosion resistance and maintain airtight connections. Inspect joints after installation and perform routine checks as part of HVAC maintenance schedules.