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VL • Circular Flange Ring

  • Circular Flange Ring
  • Suitable for straight seemed or spirally wound ducts
  • Galvanised Mild Steel

VerroLoc (VL) - Circular Flange Ring

Brand

  • Doby Verrolec

Application

VerroLoc Circular Flange Ring System is designed specifically to provide an economical method of jointing for circular ducts, suitable for straight seamed or spirally wound ductwork.
The VerroLoc system comprises two flange profiles produced to suit the required duct diameter; each flange is complete with an integral sealant providing an airtight ductwork connection when correctly fitted to the end of the duct section.
On site the duct sections are assembled using the provided VerroLoc closure ring, the accuracy of the product ensures that a minimum amount of effort is required to fit the flange on to the duct.
VerroLoc Circular Flange Ring System reduces fabrication and installation time of conventional RSA flanges and provides easy removal of ductwork sections for cleaning and maintenance purposes.
In the absence of established industry testing procedures, the VerroLoc Circular Flange Ring System was independently tested in accordance with the HVCA air leakage test procedures for Ductwork Jointing Systems DW/TM1

Material

  • Galvanised Mild Steel
  • Also available in 304L & 316L Stainless Steel.

Composition

  • Suitable for straight seemed or spirally wound ducts.
  • Reduces fabrication and installation time compared to RSA Flanges.
  • Easy removal of duct sections for cleaning or maintenance purposes .
  • Accuracy of production ensures minimum efforts to fit flange ring to duct.
  • Easier installation in confined spaces when compared to RSA Flanges.
  • Independently tested by BSRIA, proven to work within requirements of UK HVCA Specification DW144.
  • A sealant pocket is rolled into the profile allowing effective sealing of ring to duct. A permanent non-setting, non-toxic sealant can be injected into the profile if requested.
  • Quick closure and release latch with safety wedge available up to 900mm diameter for rapid removal of duct sections.
  • Manufactured from Galvanised Mild Steel for corrosion resistance, avoids need for secondary painting.

Dimensions

ModelGauge (mm)DiameterWeight (kg)PackingQty
Flange
Ring		Closure
Ring		 AllFlange
Ring		Closure
Ring		Joint(Complete
mmJoints)
VerroLoc
10		0.70.71000.268   VerroLoc
10		10
1120.291   
1250.317   
1400.347   
1500.366   
1600.386   
1800.424   
2000.465   
2240.512   
2500.563   
2800.622   
VerroLoc
15		0.80.83000.889   VerroLoc
15		10
3150.923   
3501.014   
3551.027   
VerroLoc
20		1.01.0400 0.430.151.01VerroLoc
20		5
450 0.480.161.12
500 0.900.502.30
560 1.000.502.50
600 1.100.602.80
630 1.160.632.95
710 1.200.703.10
800 1.400.803.60
900 1.600.904.10
VerroLoc
30		1.21.21000 3.602.009.20VerroLoc
30		1
1120 4.102.2010.40
1250 4.602.5011.70
1400 5.102.8013.00
1422 5.202.8013.20
1500 5.503.0014.00
1600 5.803.1014.70
2000 7.303.9018.50

Minimum Tensile Strength Values

ProfileSize Range
Closure Ring		Pressure Class (DW/TM1 **)
ABC
mmLatchStudLatchStudLatchStud
VerroLoc 10100-280√√√√X√
VerroLoc 15300-355√√√√X√
VerroLoc 20400-900√√√√X√
VerroLoc 301000-2000*√√√√X√
* Diameter over 1600 please refer to the sales office for further details
** In-house testing witnessed by BSRIA using BSRIA approved test rig.
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