Delta Flanges System

Fast Assembly • Airtight Sealing • DW144 / SMACNA Compliant

The Delta Flanges System provides a fast, secure, and efficient solution for joining the transverse ends of rectangular ductwork in HVAC systems. Engineered for medium to high-pressure air distribution installations, this slide-on duct flange system is available in 20mm, 30mm, and 40mm variants, complete with matching corners, cleats, and clamps to ensure a fully compatible connection system.

Manufactured using high-quality galvanized steel through precision roll forming, Delta Flanges deliver long-term durability, consistent joint alignment, and airtight sealing performance. Each flange is injected with a permanently flexible, non-toxic, non-drying sealant, ensuring maximum air leakage prevention without requiring additional grease or lubricant during installation.

Key Features

• Quick and easy assembly for rectangular duct joints
• Factory-injected, non-setting sealant ensures long-lasting airtight sealing
• Available in 20mm, 30mm, and 40mm flange heights
• Complete accessory range: corners, cleats, and clamps
• Roll-formed for precision and consistent fit
• Manufactured using Z-275 / G-90 galvanized steel
• Complies with DW144 and SMACNA duct construction standards
• Suitable for J6 joint rating and pressure classes A, B, and C

Design Specifications

• ✔ Manufactured from galvanized steel sheet with a minimum zinc coating of 275 g/m²
• ✔ Integrated non-setting liquid sealant for airtight performance
• ✔ Sealant sourced from reputable US or European manufacturers
• ✔ Grease-free and lubricant-free joint system

Available Thickness by Flange Size

• • 20mm: ≥ 0.70mm
• • 30mm: ≥ 0.80mm
• • 40mm: ≥ 1.00mm

Applications

• ✔ HVAC ductwork in commercial, residential, and industrial buildings
• ✔ Medium to high-pressure air distribution systems
• ✔ Air handling units (AHU) and central duct networks
• ✔ Projects requiring fast duct fabrication and strong sealing reliability

Available Models & Specifications