Do czego stosuje się przejścia szczelne?

Można je stosować na obiektach wodnych, cieplnych, na basenach, w kanałach, konstrukcjach przeciwwodnych, gazociągach, oczyszczalniach ścieków oraz przy uszczelnieniach zbiorników wodnych. Chronią przed naporem wód gruntowych oraz wody bezciśnieniowej, są gazoszczelne i posiadają zabezpieczenia przeciwpożarowe oraz antywybuchowe.

Jak działa przejście szczelne?

Rozwiązanie opiera się na gumowych uszczelkach umieszczonych między stalowymi pierścieniami. Zaciśnięcie obejmy powoduje ucisk uszczelki, która szczelnie wypełnia przestrzeń między rurą lub kablem a ścianą budynku. System Podwójnego Profilowania (DPS) dodatkowo rozprowadza nacisk łagodnie w stronę ściany i mocno w stronę rury lub kabla.

Czym jest system DPS (Podwójnego Profilowania)?

Zmniejsza krzywizny powierzchni uszczelki, zwiększając powierzchnię uszczelnianą o prawie 100%. Zwiększa to bezpieczeństwo np. w przypadku ściany z otworem o nierównej powierzchni.

Jaki jest dopuszczalny kąt odchylenia rury od osi w przejściach szczelnych?

Dopuszczalne odchylenie rury od osi wynosi 8 stopni.

Czym różnią się uszczelki EPDM i NBR?

EPDM to elastomer antypoślizgowy, odporny na niemal wszystkie kwasy, zasady i solanki, nadający się do wody pitnej, pracujący w zakresie od -40°C do +140°C, ale nienadający się do olejów, tłuszczów i rozpuszczalników. NBR jest odporny na oleje, tłuszcze i paliwa dostępne na rynku, ale nie nadaje się do rozpuszczalników, środków chemicznych ani paliw lotniczych, i pracuje w zakresie od -40°C do +80°C.

Jaki materiał uszczelki najlepiej sprawdzi się w wysokich temperaturach?

Silikon (Silicon Rubber) ma najwyższą odporność termiczną spośród opisanych materiałów – pracuje w zakresie od -90°C do +250°C.

Czy w jednym otworze można poprowadzić więcej niż jedną rurę lub kabel?

Tak, przejścia szczelne są dostępne w wersjach wieloprzepustowych, przeznaczonych do takich potrzeb instalacyjnych.

How can you ensure that the transitions are airtight?

The point where pipes or cables pass through walls is an extremely vulnerable spot in a building’s insulation map.

Every insulation contractor—or installation crew, since they’re the ones who usually face this problem—has their own way of securing these types of penetrations.

Recently, special sealing clamps designed to be fitted over cables or pipes have been growing in popularity. One of the manufacturers of such components is the German company DOYMA.

The range of applications for these types of materials is extremely broad. They can be used in water and heating systems, swimming pools, canals, flood protection structures, gas pipelines, wastewater treatment plants, and for sealing water reservoirs. This is because they meet a number of technical requirements: they protect against groundwater pressure and so-called non-pressurized water, serve as a protective barrier, and tightly fill the space between the pipe and the borehole diameter; they are available in multi-pass versions (for installation purposes); the permissible pipe deviation from the axis in these cases is 8 degrees; they are gas-tight; and they also feature fire- and explosion-proof safeguards.

How It Works How the DOYMA sealed passage works:

The solution is based on the use of rubber gaskets between steel rings through which any pipe or cable passes. Tightening the clamp compresses the gasket located between the steel rings, which thereby tightly fills the space between the pipe/cable and the building (building wall). Additionally, the DPS( Double Profiling System) ensures intelligent pressure distribution: gently toward the building (wall) and firmly toward the pipe or cable.

The standard insert consists of an asymmetrically profiled steel ring with a minimum thickness of 5 millimeters and featuring the DPS system. In addition, it includes one or two 27-millimeter-thick elastomer rings—which meet the sealing requirements for both pressurized and non-pressurized water—as well as inserts with two 3-millimeter thick, which ensure uniform pressure distribution.

DPS System:

It reduces the curvature of the gasket’s surface, thereby increasing the sealing area by nearly 100% (Fig. A). This enhances safety, for example, in the case of a wall with an opening that has an uneven surface.

Traditional sealing:

The sealing material has less contact with the surface being sealed(Fig. B) due to the bulging of the gasket (caused by high pressure).

Seals: Types of Polymers

EPDM (Ethylene Propylene Dimer)

Non-slip, flexible elastomer resistant to friction-reducing substances.
Excellent chemical resistance to nearly all types of acids, bases, and brines
Suitable for drinking water
High thermal and mechanical resistance
Not suitable for oils, greases, and solvents
Temperature range: -40°C to +140°C.

NBR (Nitrile Butadiene Rubber)
Resistant to oils, greases, and commercially available fuels.
Not suitable for solvents, chemicals, aviation fuels, or fuels with a high methanol content.
Temperature range: -40° C to +80° C.

FPM (Fluororubber)
Chemical resistance, including resistance to solvents, fuels, natural gas, oils, greases, and aviation fuels
Temperature range: -30° C to +200° C.

Silicone (Silicone Rubber)
High thermal resistance: from -90° to 250° C.
Good ozone resistance
Limited chemical resistance – not suitable for fuel, oil, and solvents

Prepared by: IZOSERVICE Editorial Team
Source: DOYMA

Frequently Asked Questions

What are sealed penetrations used for?

They can be used in water and thermal facilities, swimming pools, canals, flood control structures, gas pipelines, wastewater treatment plants, and for sealing water reservoirs. They protect against groundwater pressure and non-pressurized water, are gas-tight, and feature fire- and explosion-proof safeguards.

How does a watertight passage work?

The solution is based on rubber gaskets placed between steel rings. Tightening the clamp compresses the gasket, which tightly fills the space between the pipe or cable and the building wall. The Double Profiling System (DPS) additionally distributes the pressure gently toward the wall and firmly toward the pipe or cable.

What is the DPS (Double Profiling) system?

It reduces the curvature of the gasket’s surface, increasing the sealing area by nearly 100%. This improves safety, for example, in the case of a wall with an opening that has an uneven surface.

What is the permissible angle of pipe deviation from the axis in sealed penetrations?

The permissible deviation of the pipe from the axis is 8 degrees.

What is the difference between EPDM and NBR seals?

EPDM is a non-slip elastomer that is resistant to nearly all acids, bases, and brines; it is suitable for drinking water and operates in a temperature range from -40°C to +140°C, but is not suitable for oils, greases, or solvents. NBR is resistant to commercially available oils, greases, and fuels, but is not suitable for solvents, chemicals, or aviation fuels, and operates within a temperature range of -40°C to +80°C.

What gasket material works best at high temperatures?

Silicone rubber has the highest temperature resistance of all the materials described—it operates in a range from -90°C to +250°C.

Can more than one pipe or cable be run through a single hole?

Yes, watertight penetrations are available in multi-pass versions designed for such installation needs.