Flanges PF

 
PF Circular Flanges

Cost effective circular flange for small duct diameters  (80 up to 180 mm)
Pressed flange which can be swaged into the duct. That way the duct inner surface remains free of any projections (for dust removal, wood chips transport and other similar applications requiring a smooth inner duct surface).
Alternative fastening methods: spot welding, self-tapping screws or blind rivets
Assembly through SS Joining Clips.

  1. Duct wall
  2. PF flange
  3. The ends are tapered to facilitate the insertion of the flange
  4. SS joining clip

Suitable Ducts

For inner-duct diameters from 80 up to 180 mm.
In-between diameters are not available.

Suitable duct types: spirally wound ducts, longitudinal seam ducts. Not always suitable for fittings (please refer to the instructions for more information)

Not suitable for ducts and fittings with turned-out edges and ducts with stiffening ribs.

Fixation Methods

Fastening in the duct through blind-rivets and swaging.

Screws are less recommended, as they protrude inside the duct, hindering the air-flow and the cleaning operations, and could be the cause of leakages.

Spot welding only possible when the flange and duct are an exact fit (low tolerances).

Characteristics

The application of a sealant between the flange and the duct is necessary in order to make the connection air-tight.

The flanges stiffen the ducts and help maintaining their round shape. They also improve the resistance of the ducts under negative pressures. Ducts should nevertheless be strong enough by themselves and resist the required pressures (+ or -) without taking the flanges into account.

No gap, as the flange is a pressed continuous ring.

Available in galvanized steel and stainless steel V2A (1.4301 ASTM 304) upon request. Cracks can appear on the stainless steel versions. They are unavoidable and consequently no reason for a claim. Please also refer to ZI-101

Caution

A sealant must be applied.

In-between diameters are not possible


Cracks can appear on the stainless steel versions. They are unavoidable and consequently no reason for a claim.

Prices

Installation Instructions

Screws or Rivets?

Texts for Tenders

 

Dimensions

 

CAD Drawings

Made by METU in Germany