Nextel® Multi Tube Bellows (MTB) are fabricated using high-temperature resistant textiles (up to temperatures of 1370°C or 2500°F) to seal complex gaps in the fired heater or furnace systems. Each MTB is specifically engineered to absorb the multi-axial movement of the tubes whilst still retaining a near perfect seal on the interface between the firebox and the external environment. Depending on the operating temperature, the MTB can be designed and manufactured either filled with ceramic fiber blanket or loose ceramic bulk fiber for adequate heat insulation.
|Multi Tube Bellows||Conventional|
|A flexible tubing-passing sealing system to block all the air ingress||Utilizes sliding plates, an insulation padding or an insulation blanket around the tube|
Conventional methods are ineffective at sealing off the flow of air through and around the heater. In some cases, seals will block only 10% of the ingressing air.
Firstly, some details are considered such as:
The data are then used to design and fabricate MTBs in our factory and shipped to our clients.
Multi Tube Bellows installation is done as follows:
Depending on the requirements, the fixation method can be varied as follow: