GBC Inflatable Twin Bag Purge Systems in Various sizes
GBC Twin Bag Purging Systems consist of two inflatable bags connected by a spinal tube and a pressure valve. The system is positioned by viewing the luminous tape through the weld joint gap. E-Z ZONE TAPE is used to seal the weld gap and purge gas flow can commence at up to 20 Ltr/min. The bags inflate, a seal is created either side of the weld joint and the pressure valve releases gas into the weld chamber. By using a GBC Oxygen Monitor to constantly measure the oxygen content in the weld chamber the welder will know when to reduce the gas flow and commence welding.
The system is left in position post welding until the weld joint temperature drops to below oxidation levels, then the purge gas feed is disconnected, the bags deflate and the system can be withdrawn.
For more critical applications higher spec versions are available with non-scratch spinal tubes and a gas feed system to replace pressure release valves.
Twin Purge Bag Heat Resistant System to 350°C
Designed for use when high temperatures are encountered in the welding process, such as pre and post-heating applications. These systems are heat resistant up to 350°C for up to 24 hours and 500°C for short periods.
Mirroring the features of the standard range of inflatable purging systems, the heat-resistant range includes a luminous positioning band for rapid centering and setup. These systems can remain in place throughout the pre-heating, welding, and post-heat treatment cycles, allowing the weld to be purged continuously for up to 24 hours if necessary.
Key Features:
- Heat resistance up to 350°C (24 hours) and 500°C (short periods)
- Luminous positioning band for easy setup
- Continuous operation through complete welding cycles
- 24-hour purging capability