Duct Clamps – Without Lining (Galvanised) 33493

HVAC • Spiral-Seam Duct Support • Galvanised Steel

Duct Clamps – Without Lining (Galvanised) 33493 are high-quality two-piece galvanised steel clamps specifically engineered for the secure attachment of spiral-seam pipes in HVAC and ventilation systems. Designed to match standard air duct dimensions, these clamps combine strength, precision, and quick installation, providing long-term reliability in industrial, commercial, and residential ducting applications.

The MÜPRO design features dual locking screws that enable flexible adjustment to accommodate variations in pipe diameter. Each clamp includes combi-cross slit head screws with captive washers for easy tightening using screwdrivers, while larger diameters (≥450 mm) are secured with M10 hexagon screws for maximum strength. Manufactured for M8/M10 connecting threads, these clamps deliver stable and durable pipe support in all ventilation installations.

Applications

Attachment of spiral-seam pipes in ventilation and HVAC systems
Air duct installations in industrial and commercial buildings
Suitable for residential air distribution systems

Key Features & Advantages

Manufactured to suit air duct dimensions for precise fitting
Dual locking screws allow easy adjustment for varied pipe diameters
Combi-cross slit head screws with captive washers for convenient screwdriver installation (up to Ø 400 mm)
M10 hexagon screws used for larger pipe sizes (≥ 450 mm)
Compatible with M8/M10 connecting threads for installation flexibility
Galvanised steel construction for corrosion protection and extended service life

Technical Specifications

Nominal Size (DN)	Connecting Thread	Max. Recommended Load (N)	B (mm)	H (mm)	H₁ (mm)	b (mm)	s (mm)
80 – 200	M8 / M10	500	119 – 239	50 – 110	91 – 211	20	1.2
224 – 400	M8 / M10	500	272 – 449	131 – 220	247 – 424	25	2.0
450 – 800	M10	500	515 – 866	245 – 420	474 – 825	25	3.0

Custom duct clamp sizes and variants can be produced upon customer request.

Material & Design

Material: Galvanised Steel (Zinc-coated for corrosion resistance)
Lining: None (rigid design for spiral-seam ducts)
Connecting Threads: M8 / M10 (M10 for larger diameters)
Max. Load: 500 N

Advantages in Use

Provides secure duct support with adjustable dual-screw fastening
Ensures reliable installation using captive washers and hex or cross-head screws
Corrosion-protected design guarantees long operational lifespan
Compatible with standard MÜPRO threaded rods and mounting systems