GTT Torch Pressure Chart
GTT Torch Pressure Chart
This Bradshaw Oxygen reference chart summarizes common Glass Torch Technologies pressure guidance and adds practical oxygen concentrator notes for lampworkers and glassblowers. Use this as a planning tool, not as a replacement for the official GTT instructions. Always follow the torch manufacturer manual, use proper regulators, oxygen rated hose, ventilation, eye protection, flashback protection where required, and leak checks.
Important: PSI and LPM are different. PSI is pressure. LPM is oxygen volume. A torch can have enough pressure but still be oxygen starved if the system cannot supply enough flow. A torch can also have enough flow but still underperform if the required pressure is higher than the oxygen source can maintain.
| GTT torch model | Typical fuel pressure | Typical oxygen pressure | Bradshaw Oxygen concentrator guidance |
|---|---|---|---|
| Cricket | Propane 5 PSI, natural gas about 1/4 to 1 PSI | Tank oxygen 10 PSI, concentrator at recommended flow | One quality 10 LPM concentrator is usually a strong fit. A 5 LPM unit may work for light use, but a 10 LPM unit gives more room to grow. |
| Bobcat | Propane 5 PSI | Oxygen 10 PSI | One 10 LPM concentrator is usually a strong match for typical use. The Invacare Platinum 10, AirSep NewLife Intensity 10, Drive DeVilbiss 10, and Millennium M10 are all options depending on budget and inventory. |
| Lynx | Propane 5 to 8 PSI | Oxygen 15 to 25 PSI | A 10 LPM concentrator may support many users, but pressure headroom matters. The AirSep NewLife Intensity is often worth considering when the customer wants stronger pressure capability. |
| Scorpion | Tanked fuel 5 PSI, natural gas minimum about 1/2 PSI | Tanked oxygen 5 to 10 PSI | Can be concentrator friendly depending on flame size, center fire use, oxygen purity, and whether the artist needs outer fire performance. |
| Phoenix and 13 Jet Cheetah | Propane 5 to 8 PSI | Oxygen 20 to 25 PSI | These are more sensitive to pressure and flame adjustment than small two valve torches. Ask about glass type, flame size, and whether full output is expected before recommending one concentrator. |
| Sidewinder | Tanked fuel 5 to 10 PSI, natural gas minimum about 1/2 PSI | Tanked oxygen 10 to 40 PSI | Often needs more planning than one standalone concentrator. Center fire use may be easier to support than regular outer fire use. |
| Delta, Mirage, and Phantom | Fuel gas 10 PSI | Oxygen 35 PSI | Do not assume one standard concentrator will provide full performance. These torches often need multiple concentrators, oxygen storage, boosted oxygen, or tanked oxygen depending on the work. |
| Ninja and Samurai | Fuel 15 PSI | Oxygen 50 PSI | Advanced high demand torches. These are not typical single concentrator recommendations. |
How Bradshaw Oxygen Uses This Chart
This chart is used to help the customer choose the right oxygen system. It should not be used as a simple yes or no compatibility list. Before recommending equipment, confirm:
- Exact GTT torch model
- Whether the customer uses the center fire only or the outer fire regularly
- Soft glass, borosilicate, or both
- Hobby work or production work
- Desired flame size
- Current oxygen equipment
- Future torch upgrade plans
Concentrator Warmup and Purity Notes
For concentrator use, GTT instructions commonly emphasize warming the concentrator before running the torch. Bradshaw Oxygen recommends allowing the concentrator to stabilize before judging flame performance. Some setups perform better when the concentrator is not pushed beyond the manufacturer's recommended flow because oxygen purity can fall when a concentrator is overdrawn.
When One 10 LPM Concentrator Makes Sense
One quality 10 LPM concentrator is usually most appropriate for smaller GTT torches such as the Cricket, Bobcat, and many Lynx use cases. Final performance still depends on flame size, purity, hose setup, and the condition of the concentrator.
When More Oxygen Planning Is Needed
Additional planning is needed for larger GTT torches, high pressure torches, full output work, heavy borosilicate, large marbles, hollow work, and production studios. In those cases, a customer may need multiple concentrators, oxygen storage, a booster, or tanked oxygen.
Bradshaw Oxygen Recommendation
If a customer asks, “Can one concentrator run my GTT torch?” do not answer from PSI alone. Ask for the model and work style, then recommend the complete oxygen system. When uncertain, direct the customer to Bradshaw Oxygen for a custom recommendation before purchase.