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General Machine Products (KT), LLC
10.0 DUCT INTEGRITY
This is entirely the responsibility of the operator.
To be sure that the duct into which the cable is to be inserted is installed appropriately, it is recommended
that its integrity and lubrication be checked.
i.e. check that the duct is:
1.
Not blocked
2.
Not squashed
3.
Continuous (i.e. it has not been fractured somewhere along its route and the fractured ends separated)
4.
Also check that any joints are pressure tight
There is a seal plug to carry out some simple checks however as the airbox cannot be 100% sealed it
cannot be used for a fully integrity test.
GMP does offer a Innerduct Pressurization test kit that is used
to test the integrity of the duct before the cable is blown in. Order P/N 89641
CAUTION: ANY OBJECT INADVERTENTLY LEFT IN THE DUCT DURING THE DUCT LAYING MAY
BE EXPELLED FROM THE END OF THE DUCT WITH HIGH FORCE AND VELOCITY. IT IS IMPERA-
TIVE THAT NO PERSONNEL BE IN THE VICINITY OF THE END OF THE DUCT OR THAT A SUITA-
BLE DEVICE IS FITTED TO THE END OF THE DUCT TO ARREST ANY EXPELLED OBJECT.
The checks listed at 1
-
4 (inclusive) above may all be carried out at the same time using one check. The
procedure is outlined as follows.
1.
Set up the air box and duct clamp as shown above.
2.
When the air box has been set up as shown in the image the air box and duct clamp should be closed
as for usual cable installation.
3.
The air box and duct clamp are now set up to blow air through the duct. Connect the air as for normal
blowing. Make sure there are personnel at the other end of the duct run, and that they are aware that
the air is to be turned on. Make sure that a suitable device is fitted to prevent injury should any object
be expelled from the far end of the duct.
CABLE SEAL
PLUG
FIT DUCT AND SEAL IN
SAME POTION AS NORMAL
CABLE INSTALLATION
Содержание 90000
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