The CBS Cable Overblowing Junction Box has been designed to install a new cable or duct-tubes into an existing occupied sub-duct (subject to space being available).

The Cable Overblowing Junction Box comprises a robust aluminium base and lid that form a pressurised air chamber into which one end of an existing occupied sub-duct can be attached. The existing cable can exit the Cable Overblowing Junction Box through an opening that has 3 cable seal slots, one of which will house the seal to suit the size of the existing cable. The third branch is then connected to a CBS Cable Blowing Machine via. a short slave length of sub-duct for the installation of the extra cable or tube(s).

A range of Overblowing junction boxes are available to suit the outside diameter of the sub-duct.

CABLE DIAMETERS
The maximum diameter of a new cable / tube(s) for installation is dependent on the diameter of the existing cable and duct bore.
It is the responsibility of the operator to ensure that the cable / tube(s) to be installed are compatible with the existing sub-duct and installed cable configuration.

Cable range limit 9-20 mm O.D.

Duct range (Note: one duct O.D. size per unit)
Minimum 25 mm O.D
Maximum 50 mm O.D

INSTALLATION PRINCIPLE
Viscous Drag

PNUEMATIC SYSTEM
Max. operating pressure 12 Bar

For Ducts with an Inner Diameter of: Minimum Flow Acceptable

0 up to 25mm   : 4m³/min 150 CFM
26 up to 30mm : 5m³/min 185 CFM
31 up to 35mm : 7m³/min 250 CFM
36 up to 40mm : 10m³/min 375 CFM
41 up to 44mm : 12m³/min 450 CFM

DIMENSIONS

LENGTH: 295 mm
HEIGHT: 74 mm
WIDTH: 170 mm
WEIGHT: 4 kg