Monday, September 26, 2022

Manhole shaft rehabilitation made easy

ProKASRO technicians in Brno, Czech Republic with Brandenburger and the KASRO UV shaft rehabilitation system

At the beginning of September 2020 ProKASRO technicians were on the road together with Brandenburger and the KASRO UV shaft rehabilitation system in Brno, Czech Republic. The municipality and surrounding sewer rehabilitation companies took part in the demonstration of a new UV technology.

Three manholes, each with a diameter of DN1000 and lengths of one to three meters, were rehabilitated with brand new products from technology and liner manufacturers in Brno and Budweis.

The combination of the ‘BBS.8 UV’ Brandenburger Liner, specially designed for manhole rehabilitation, together with the new KASRO UV manhole rehabilitation system led to a smooth and fast curing with excellent results.

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ProKASRO had already responded to the increasing demand in the field of shaft renovation in 2019 with the  design of the 4 x 1,000 W UV light source core with camera and 2 temperature sensors. A separate control unit, that fits in a small flight-case with logging, temperature and pressure measurement systems, as well as a single DN500 packer with straps for the crane suspension for easy insertion into the shaft are included in the mobile UV system. With this system, manholes can be restored to an excellent condition. If there are heavily damaged manholes with fractures, cracks and other types of damage, rehabilitation using UV technology is the more cost-effective and environmentally friendly alternative to excavation and complete manhole renewal.

With a pulling speed of 250 mm per minute, the actual renovation process including lowering the core, igniting and pulling it up again with curing was completed after ten minutes. The entire process from arriving at the construction site, preparing the shaft, installing the liner, calibrating the liner, lowering the UV core in the manhole and curing was completed in just two hours.

The customers and municipalities on site were more than satisfied with the procedure and the rehabilitation results and showed great interest. Further demonstration sites are planned in Poland during 2021 under the direction of Prokasro’s sales representative, Georgi Barzanov, who is responsible for the Eastern European region. Website: www.prokasro.de

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