Overview of connecting systems

 

Pull-rings for U-shaped seal

 

 

1. Quick Connect pull-ring Ø 80 to 300 mm extremely quick mounting.
2. Pull-ring with screw fitting Ø 60 to 400 mm

Versions: electro galvanized. Alternative: stainless steel (1.4301). Same profile of pull-rings for piping with a thickness of 1 mm and 2 mm.


The wall thickness is equalized by thicker U-shaped seals for 1 mm pipes and thinner ones for 2 mm pipes. The U-shaped seal is only slipped over one of the two lips.

Lip seals are available in NBR, silicone, conductive EPDM and Viton to meet the multiple chemical and thermal requirements.

Special tight connection:

The air leakage per connection measured at a differing pressure of 0,5 bar – e.g. 0,08 litres per hour on a diameter of 80 mm and 1,8 l/h on a diameter of 300 mm – are far below the admissible values of DIN EN 12237, class D.

The requirements for nuclear plants (KTA 3601) of max. 10 litres per hour and square meter pipe surface are below the limits. Provided that the U-shaped seals are resistant enough, no leakages have been found out with condensed liquids in the pipe.

Connections of 1.5 mm and 2 mm thick piping with up to Ø 300 mm and 1 mm thickness for Ø 80 mm have been certified as shock-explosion proof up to 3 bar overpressure. Surge pressure proof pipelines with a diameter of more than 300 mm have to be installed with loose flange connections.

Application:
Bulk goods conveying and plants for air technique with differential pressures up to 50.000 Pa (500 mbar, 5.000 mm WC).

 


 

Pull-rings with factory-fitted sealant
Diameter: Ø 80 to 630 mm
Version: electro galvanized


Due to a larger bending of lines with smaller diameters caused by the mastic sealant, different pull-ring profile widths are available for the different diameters of 1 mm, 2 mm and 3 mm thick piping.

An very easily assembled connecting system. The permanently elastic sealant in the pull-ring is physiologically safe. It is covered by a foil, but nevertheless it cannot be excluded that sealant comes inside the pipe.

Range of temperature: -40 °C to +90 °C.
For 3 mm thick piping with a diameter up to 300 mm the connection is certified as shock-explosion proof up to 3 bar over-pressure.

Application:
Bulk goods conveying by gravity and plants for air technique.

For higher demands with regard to sealing and resisting properties of the connection pull-rings with U-shaped seals should be preferred.

 


 

Loose flange piping

Diameter: Ø 350 to 800 mm
Versions: primed steel, hot-dip galvanized and stainless steel (1.4301)

Pipe thickness: 1 mm (1.5 mm) and 2 mm – 3 mm on request

 

The lip width for loose flange connections is not 6 mm as used for pull-ring connections but it is 10 mm. For sealing a U-shaped seal for 10 mm is necessary, which is pulled over one of the two lips.


The connection with respective piping up to a diameter of 630 mm is certified as shock-explosion proof up to 3 bar over-pressure.

Application:
Bulk goods conveying and plants for air technique with differential pressures up to 50.000 Pa (500 mbar, 5000 mm WC).

 

 


 

 

Slip-over flange-pull-rings and piping 


Diameter: Ø 80 to 300 mm
Version: electro galvanized. Stainless steel on request.

Piping 2 mm and 3 mm thick with welded-on slip-over flange with permanent elastic silicone-free seal put on by factory. Certified as shock-explosion proof up to 10 bar over-pressure.


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