Table of Contents
Advertisement
ADJUSTABLE LENGTH (LA) - Thermal Expansion and Odd
lengths
The LA has two functions. It is used to compensate for thermal expansion
and make up odd lengths of duct.
NOTE: The LA cannot be used in positive pressure system. A Bellow Length (LB) must
be used instead. In a case there is also an odd distance to fit in a positive pressure
systeme, a Variable Length (LV) can be combined with a LB.
It is shipped with graphite band assembly preassembled on the sliding inner
pipe. See Figure 13.
Half Outer
Retaining
Band
Cuttable Half
Outer Casing
Movable Gasket
Assembly
Cuttable Sliding
Inner Wall
Figure 13 - Adjustable Length
Figure 14 - Detail of Adjustable Length
11
Gas Flow
Single
Flanged
Band
Double
Flanged
Band
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
The whole LA assembly includes:
See Figure 14 for details
• A sliding inner wall that fits closely inside a standard pipe section and it is flanged on
one side.
• An adjustable gasket assembly, composed of;
•
two containing rings;
◦
one compression band (metal Tie Wraps)
◦
a graphite packing gasket
◦
one double flanged band
◦
one other single flanged band
• Insulation band (DIS PRO only)
• two half outer casing (DIS PRO and DAS PRO ONLY)
NOTE: Sealant must be ordered separately. See SEALANT USAGE in SECTION C.
There is also a supplied tool with this assembly. This tool works as a spacer
when tighten the bolts of the containing rings on the graphite gasket. See
Figure 18.
NOTE: Do not remove this adjustable gasket assembly from the inner pipe.
See Figure 14.
Advertisement
Table of Contents
