MAINTENANCE MANUAL – ELECTRIC ROTARY DRYER
FERREX ENGINEERING LTD. Page 8 Ref. #2278
Needed Tools:
1) Sockets and wrenches to fit nuts and bolts of mounting
assembly.
2) Sharp knife to cut bolt hole slits into seal.
FabriSealtm Installation:
1) Remove the old seal and replace any old bolts that are damaged.
2) Run a belt sander or grinder over the shell surface around the sealing area to remove any rust,
weld spatter, beads, or product buildup. If the shell walks longitudinally during operation, sand
the area also where the seal will ride. Polish the shell as much as possible as this will greatly
extend the effective life of the seal.
3) Lace the yellow tension straps through the belt loops. The straps should be laced in from the
ends of the seal to meet in the middle. There will be one segment for shell diameters up to 4’,
two segments for 4’-8’ diameters, and three segments for shells over 8’ OD.
4) Sling the seal over the shell such that the seal hangs evenly. This will allow the seal to overlap at
the exact bottom of the shell to facilitate possible feed dump cleanout.
5) Starting at the top, position the seal such that it forms a 90-degree angle with the shell (see
sketch pg. 3). The seal contact area should be about 2 ½” to 3”. Make sure there is not severe
seal sag between the ring and the shell (This will cause the seal to wander on the shell and
possibly invert back into the hood). Use a sharp knife and cut slits in from the outside edge of the
seal making sure to only cut deep enough to fit over the bolt holes. This will “relax” the seal on
the mounting ring as well as relieve the “pucker” on the shell surface.
6) Work your way down the sides fairly evenly cutting bolt hole slits. As sufficient bolt hole slits are
made, clamp the seal in place with the clamping ring segments.
7) When the bottom is reached, make sure the overlap corresponds with the direction of rotation
(see sketch pg. 3). If installed backwards, the seal will roll up and fail.
8) Lace the strap ends into the length adjustment clips. Affix the tension springs to the clips. Do not
attach the springs to anything other than the strapping clips and vice versa. Do not hang weights
from the springs or strapping. You can adjust the strapping length as needed.
9) Check the sag at the bottom of the seal. A slight gap (1/4” to ½”) is desirable at the bottom. This
will allow for thermal expansion of the shell when heated.
The last step is important such that testing is highly recommended prior to
operation.
10) Rotate the shell while pulling operating draft (if possible) to test the seal fit prior to firing and
operation. Observe the fit around the sealing surface. Adjust the fit accordingly remembering to
allow for thermal shell expansion. The seal only needs to make light continuous contact with the
