Refrex® Multi Tube Bellows

Refrex® Multi Tube Bellows are pre-fab, custom made, flexible protrusion seals to be installed in a roof opening with one or more process tube penetrations. Suitable up to 1350°C.

Due to the flexible high temperature fabrics the tubes can easily move in the requested directions. Refrex® Multi Tube Bellows save a lot of energy (high reduction of cold air ingress). Cold air ingress is reduced to a minimum. Refrex® Multi Tube Bellows have a rapid return on investment (ROI) - calculation is available on request.

Complicated high temperature tube passings, through roofs or walls can be flexible sealed by Insulcon’s Refrex® Mono or Multi Tube Bellows.

Experienced engineers

Since 1984 Insulcon’s Wearflex® Division started to develop high temperature flexible tube-seals for ethylene crackers, reformers, crude heaters, etc. for several multi-nationals. Refrex® Multi Tube Bellows are applied now for many years in Naphtha- and Ethylene Cracking, Reforming-, and Platforming furnaces, Visbreakers, Crude heaters and all kind of process heaters. 

Our database of success, know-how and our range of technical fabrics, allow the Wearflex® division to select the ideal combination of materials to produce an end product with guaranteed optimal service life. Based on Insulcon’s worldwide experience with high temperature woven fabrics, the Refrex® woven fabric types were selected to be the best materials for the (HT) Bellows.

Well-established engineering companies as well as several (petro-) chemical multinationals are on our reference list. These can be obtained from our Department Marketing. 

Do you need advice? Or do you have questions? Don't hesitate to contact us. Due to own production facilities Insulcon is able to deliver custom-made materials and solutions.
You can use the contact form as shown below or try the chat option. Our team is also available by e-mail: or by phone: +31 (0) 167 565750.