Low Pressure blocking plug
Cherne Test-Balls now feature patented Rupture Disc Technology, designed to prevent over-inflation and protect the plug’s internal cording from damage.
Cording damage is often hidden but can significantly reduce plug performance—Rupture Disc Technology helps eliminate this risk.
Built tough and reliable, Cherne Test-Balls deliver durable, effective performance in all types of pipe.
Legend Hire Low Pressure blocking plug Hire Brochure
Features
- Multi-Size Design: Greater flexibility with fewer inventory requirements
- Patented Field-Repairable Rupture Disc Technology: Built-in protection with easy on-site repair
- Standard Schrader Valve: ¼” tire valve included on every plug
- Removable Valve on Large Plugs: Allows quick repairs or replacement with disconnect fittings
- Flexible Construction: All Test-Balls bend up to 90° for versatile use
Specifications
| Model No. | Diameter (mm) | Size Range (inch) | Size Range (mm) | Diameter | Length (inch) | Length (mm) | Weight (kg) | Required Inflation Pressure (PSI) | Required Inflation Pressure (bar) | Max Allowable Back Pressure Air (PSI) | Max Allowable Back Pressure Air (bar) | Max Allowable Back Pressure Air (ft) | Max Allowable Back Pressure Air (m) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3.5" - 4.5" | 90mm | 3.5"-4.5" | 90-125mm | 3.5" | 5.5" | 140mm | 0.67kg | 25 | 1.7 | 10 | 0.69 | 25 | 7.6 |
| 5.0" - 6.5" | 125mm | 5.0"-6.5" | 125-175mm | 5.0' | 6.0" | 152mm | 1.4 kg | 25 | 1.7 | 10 | 0.69 | 25 | 7.6 |
| 8.5" - 10.0" | 200mm | 8.5"-10.0" | 225-265mm | 8.0' | 10.0" | 254mm | 3.6kg | 20 | 1.4 | 10 | 0.69 | 25 | 7.6 |
| 11.0" - 12.5" | 275mm | 11.0"-12.5" | 275-325mm | 11.0" | 12.0" | 305mm | 5.6kg | 20 | 1.4 | 10 | 0.69 | 25 | 7.6 |
| 13.5" - 15.5" | 350mm | 13.5"-15.5" | 350-400 mm | 13.5" | 15.0" | 381mm | 10.9kg | 25 | 1.7 | 10 | 0.69 | 25 | 7.6 |
| 16.5" - 18.5" | 425mm | 16.5"-18.5" | 425-470mm | 16.5" | 18.0" | 457mm | 15.5kg | 25 | 1.7 | 10 | 0.69 | 25 | 7.6 |
| 18.5" - 21.5" | 475mm | 18.5"-21.5" | 475-550mm | 18.5" | 21.0" | 533mm | 19.1 kg | 20 | 1.4 | 8 | 0.55 | 20 | 6.1 |