One-piece insulating gaskets
SCHUCK TYPE SHD INSULATING CONNECTION with spark gap
Schuck SHD insulating fittings are used to interrupt the electrical conductivity of a pipeline or a cathodic corrosion protection system. An integrated lightning conductor diverts the high voltages via a ring spark gap. This means that the insulating part is electrically indestructible and immediately becomes operational again after an overvoltage occurs.
Lightning protection is achieved using the ring spark gap developed by the Schuck Group. The construction ensures that the electrical voltage is concentrated at this defined location and that the spark that occurs does not propagate along the surface of the insulating material. If the spark were to propagate to the insulating material and burn it at this location, the insulating part would be electrically conductive due to the "carbon filament" that would have formed, and thus electrically defective.
The annular spark gap is designed in a circular manner to avoid point combustion. Thanks to this peripheral design, the spark is reliably extinguished.
The Schuck insulating part type SHD is available in many versions, pressure levels and connection types for all media such as gas, oil, flammable liquids, water, district heating, etc. It is used in all pipeline systems, such as in conventional piping, in plant construction and in compressor and control stations.
SCHUCK INSULATING CONNECTION FOR DRINKING WATER
WITH PATENTED CORROSION PREVENTION SYSTEM
Operational safety and maximum efficiency are the guiding principles of the Schuck insulation part for drinking water.
The inside of the fitting has a permanent coating of vulcanized hard rubber over its entire length. The material used meets the high requirements of KTW* and DVGW W 270** and is therefore ideally suited for use with drinking water. Synthetic rubber forms the basis of this material. After vulcanization, it shows no signs of delamination or wear, even in the presence of abrasive ingredients, and guarantees optimum operating results.
The hard rubber coating with a minimum thickness of 3 mm ensures safe and porosity-free insulation between the drinking water and the steel pipe under active protection. A transmission of the protective current to the drinking water is thus prevented. In addition to the actual separation point between the metal parts, the hard rubber coating acts as an additional barrier over the entire length of the insulation part.
The vulcanized hard rubber coating has significant advantages over conventional epoxy coatings, both in terms of resistance to electrical penetration, elasticity under bending and wear stresses, as well as for higher flow velocities or resistance to abrasive media.