Gardner Bender BV208DA Blo-Vac User Manual
Page 7
BV23 and BV24 Seal-Off
The larger internal diameter of BV23 and BV24 seal-offs
allows more efficient flow of air when used with high volume
blowers and Blo-Vac™ systems. The BV23 and BV24
seal-offs are used in 1
1
⁄
4
" through 2
1
⁄
2
" and 2
1
⁄
2
" through 6"
conduit respectively.
7.8 Line Carriers
The line carrier is the movable “piston” that supplies the force
necessary to pull the line through the conduit when propelled
by the blower or Blo-Vac™ system. They are constructed of
durable material and is reusable.
Foam Line Carriers
GB/JetLine
®
foam line carriers are manufactured in 12 sizes
for use in conduit
1
⁄
2
" through 6". The foam line carrier, as it
travels through the conduit, will clean out water and loose
debris providing the head of water is not greater than the
maximum water lift of the blower or Blo-Vac™ power unit.
Sizes for 1
1
⁄
4
" through 6" conduit are provided with a pulling
eye on one end and a hook on the other end. The hook
provides a convenient means of attaching the Tag-Along™
line package. If pull line is used, it should be attached to the
pulling eye.
The Inflatables
®
Line Carrier
The Inflatables
®
line carrier has less friction in the conduit and
is faster running than the foam line carrier. The flexible nature
of the line carrier allows it to inflate to the conduit diameter
and pass over local obstructions that would stop a foam
line carrier.
In large conduit 4", 5" and 6", the Inflatables
®
may lie against
the conduit wall. It may be necessary to point the seal-off
nozzle toward the inflatable sleeve to achieve initial inflation.
This is accomplished by tilting the seal-off nozzle in the
conduit entrance.
When vacuuming an inflatable in the conduit it may be
necessary to fluff it out and shake it to achieve inflation.
Plastic Line Carriers
The GB/JetLine
®
slotted double skirted plastic line carriers
were developed for the Blo-Vac™ conduit fishing systems for
use in long, single bore underground ducts. The low friction
properties of the plastic makes it a fast running line carrier. If
the line carrier encounters a blockage where it cannot get
through, the slotted skirt allows the line carrier to be pulled
out past joints or steps in the duct. A hard tug on the pull
line will cause the petals to turn inside out allowing for
easy withdrawal.
Figure 15. BV23 Short Seal-Off
Figure 16. BV24 Seal-Off
Plastic Line Carriers
Part #
Conduit Size
Part #
Conduit Size
M2000
2"
M4000
4"
M2500
2
1
⁄
2
"
M5000
5"
M3000
3"
M6000
6"
M3500
3
1
⁄
2
"
Figure 17. Foam Line Carriers
Foam Line Carriers
Part #
Conduit Size
Part #
Conduit Size
FC1
1
⁄
2
"
FC7
2
1
⁄
2
"
FC2
3
⁄
4
"
FC8
3"
FC3
1"
FC9
3
1
⁄
2
"
FC4
1
1
⁄
4
"
FC10
4"
FC5
1
1
⁄
2
"
FC11
5"
FC6
2"
FC12
6"
Figure 18. The Inflatables
®
Line Carrier
The Inflatables
®
Line Carriers
Part #
Conduit Size
F125
3
⁄
4
", 1" and 1
1
⁄
4
"
F250
1
1
⁄
2
", 2" and 2
1
⁄
2
"
F400
3", 3
1
⁄
2
" and 4"
F600
5" and 6"
Figure 19. Missile Line Carrier
7