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The Y Connector (Y-Block overflow device) is a cable blowing accessory designed to enable additional cable installation into an already occupied duct. It allows technicians to deploy a second or third cable using a cable blowing machine without removing the existing cable infrastructure.
By maintaining a sealed pressurized chamber, the Y-Block prevents air leakage during overblowing operations and ensures stable cable feeding performance. This makes it an essential tool for network upgrades, capacity expansion projects, and duct optimization in telecom infrastructure.
Mechanical Structure
The Y Connector consists of a machined aluminum body with a removable cover forming a sealed pressure chamber. Cable sealing ports allow the existing cable to exit the chamber while maintaining internal pressure.
The third connection port links the cable blowing machine to the duct system through a short duct segment, allowing controlled installation of additional cables.
How to use Y Block Duct Connector
Compatibility Notes
The Y Connector must be configured according to:
- Existing cable diameter
- New cable diameter
- Duct outer diameter
- Sealing type
Using incompatible sealing components may result in pressure loss and reduced installation performance.
Application
The Y Connector is commonly used when existing ducts already contain installed fiber optic cables. With proper sealing components and duct inserts, additional cables or microducts can be installed safely using standard cable blowing machines.
Typical applications include:
- Network capacity upgrades
- Overblowing fiber optic cables
- Installing additional microducts
- Retrofit telecom infrastructure projects
Typical Overblowing Scenario
When a duct already contains one installed cable, the Y Connector enables installation of a second cable using the same duct infrastructure. In some configurations, additional microducts can also be deployed through the same system.
Because airflow must pass around the existing cable, installation speed is typically lower than the initial cable installation. However, deployment distance remains comparable when proper compressor capacity and sealing are used.
Technical Specifications
| Compatible cable diameter | 6 – 18 mm |
| Duct outer diameter | 20 – 63 mm |
| Maximum air pressure | 12 bar |
| Material | Aluminum body |
| Net weight | 14 kg |
| Gross weight | 17 kg |
| Package size | 370 × 350 × 180 mm |
Overblowing Configuration
The Y Connector creates a sealed air chamber between the existing duct system and the cable blowing machine. This pressurized chamber allows additional cable installation without removing previously installed cables.
Sealing elements are selected according to cable and duct diameters to maintain air pressure stability during installation. Correct sealing configuration is critical to prevent pressure loss and to ensure smooth cable movement inside the duct.
Operation Principle
One branch of the Y Connector is connected to the cable blowing machine, while the existing cable exits through a sealed cable outlet. The remaining branch is used for installing the additional cable or microduct. Proper sealing elements must be selected according to cable and duct diameters to maintain air pressure during installation.
Overblowing performance typically reaches approximately 50% of the original installation speed, depending on duct condition and cable configuration.
Compatibility
The Y Connector can be used with different cable blowing machines depending on cable diameter and duct configuration.
Packaging
The device is supplied in a fumigated plywood wooden case suitable for international shipment. Sealing accessories and cable-specific inserts are provided according to customer requirements.