Many Steam Methane Reformers have long catalyst tubes that expand 8″ or more when the heater goes on-line. This large axial expansion has presented problems for creating long lasting seals that effectively seal the air ingress. Flextech has solved this problem with the Reformer Tube Seal, which is widely recognized by its wire-ribbed exterior, which allows the bellows to compress with ease while retaining their shape.
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The Flextech Gang Seal is designed for applications when two or more tubes exit the heater through a shared opening or if the tube spacing is too limited to install a single tube seal.
This particular tube seal is used on an Auxiliary Boiler Economizer manifold. The outer cover is silicone coated fiberglass, which is weatherproof. This picture shows two halves of the tube seal already joined together during installation. Typically, the seal is made as two separate halves, and joined together in the field with staples or thread.