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QVF® Boresist®

- Smooth -
- Transparent -
- Non-flammable -
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The problem solution for the waste water technology and waste water industry


QVF®Boresist® glass tubes have proven themselves for decades in the discharge of chemical or organic waste water.

Borosilicate glass 3.3 is a universally corrosion-resistant material that surpasses most metals and plastics in this property.
For your safety QVF® Boresist® glass tubes:
-less adhesion in the pipelines due to smooth surface
-optical status control through transparency
-non-combustible tested material
-hermetically sealed


The piping system

By using borosilicate glass 3.3, a material developed for chemical plant construction and approved according to the European Pressure Equipment Directive, Boresist® pipes are particularly suitable for chemically or organically contaminated waste water.
The QVF-flange system Boresist® is approved according to DIN 1986, part 4 as waste water and ventilation pipe and is marked accordingly with the test seal (approval number: Z-42.1-234).
Designed as a modular system and available in five nominal widths from DN 40 to DN 150 with a length of up to 2000 mm, BORESIST® combines all the properties that a pipe system should have.
Boresist pipes and fittings are connected with couplings which compress the glass ends and whose insert also serves as a seal. Additional gaskets are not required.
In the case of the coupling the insert is made of EPDM and is suitable for kitchen waste water and organically loaded waste water (do not use for laboratory drainage).
For laboratory waste water and chemically loaded waste water the coupling is equipped with a PTFE seal in addition to the EPDM insert. Thus the resistance of the seal against aggressive waste water corresponds to that of the glass.
The classic areas of application are in the wastewater sector of chemical plants, airports, hospitals and canteen kitchens.
BORESIST-Coupling with PTFE gasket
Boresist with coupling
BORESIST piping system


Universal corrosion resistance

Borosilicate glass 3.3 is resistant to acids, salt solutions and organic substances and in these properties it surpasses most metals and other materials. Borosilicate glass 3.3 is chemically neutral.

High temperature resistance

Taking into account the materials used in the couplings, the maximum operating temperature is 120°C.
The permissible temperature difference for rapid temperature changes is max. 120 K.
The linear expansion coefficient is only 3.25 . 10-6/K between 20°C and 300°C, i.e. thermal expansions are so low that they can be absorbed by the couplings.

Pressure and vacuum resistance

All nominal diameters of the BORESIST® - pipe system are vacuum resistant.
The permissible internal pressure is -1 to +1 bar.



Fire behaviour

Borosilicate glass 3.3 is a non-flammable substance of class A1, according to DIN 4102.

Environmental friendliness

Borosilicate glass 3.3 does not release any substances hazardous to air or groundwater - even in the event of fire. It is completely recyclable and therefore a material with a guaranteed future.

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