The GST Et-Gun HVOF-LF Torch is an advanced high-velocity oxy-fuel (HVOF) spray torch specifically optimized for operation with ethanol-based liquid fuel systems.
Et-Gun – Advanced HVOF-LF Torch for Ethanol Fuel Applications
The GST Et-Gun HVOF-LF Torch is an advanced high-velocity oxy-fuel (HVOF) spray torch specifically optimized for operation with ethanol-based liquid fuel systems. The innovative combustion chamber design enables operation at elevated combustion pressures of approximately 13 bar, generating extremely high gas velocities and superior particle acceleration.
The optimized nozzle geometry creates a stable supersonic exhaust jet and a controlled low-pressure injection zone, allowing precise introduction, heating, melting, and acceleration of powder particles before impact on the substrate.
The combination of high combustion pressure, optimized gas dynamics, and efficient particle acceleration enables the production of dense, low-porosity coatings with exceptional bond strength, high microhardness, and superior wear and corrosion resistance. The Et-Gun is designed for demanding industrial applications requiring consistent coating quality, high deposition efficiency, and reliable long-term operation.
Advantages of Ethanol-Based HVOF Technology
Compared with conventional kerosene-fueled HVOF systems, ethanol-based HVOF technology provides significant advantages in operational efficiency, coating quality, and environmental performance.
Lower Operating Costs
The use of ethanol fuel provides a cost-effective alternative to conventional kerosene-based HVOF processes:
- Competitive fuel cost compared with kerosene
- Reduced oxygen consumption requirements
- Lower cooling system power demand
- Worldwide Fuel Availability
Ethanol is a globally available industrial fuel produced in many regions worldwide. Its widespread availability simplifies logistics, reduces supply chain limitations, and provides flexibility for international industrial applications.
Superior Process Stability
Ethanol combustion provides stable and repeatable process characteristics, ensuring consistent coating performance and high process reliability.
Key benefits include:
- Stable combustion behavior
- High coating repeatability
- Wide operating window with a broad range of process parameters
- Consistent coating structure and properties
- Reliable operation under demanding production conditions
Cleaner Coatings – No Carbon Contamination
Unlike hydrocarbon-based fuels, ethanol combustion significantly reduces the risk of carbon contamination within the deposited coating.
Advantages include:
- Cleaner coating structure
- Improved coating purity
- Reduced influence of combustion by-products
- Ability to achieve high-quality coatings even under fuel-rich operating conditions
Improved Operator Comfort and System Operation
Ethanol-based HVOF technology provides enhanced operating convenience:
- Smooth ignition and shutdown cycles
- Stable and predictable process behavior
- Elimination of kerosene odor during operation
- Improved working environment conditions
Et-Gun Technical Specifications
| Parameter | Value |
|---|---|
| Spray deposition rate | 60–170 g/min |
| Cooling water pressure (minimum / recommended) | 10 / 15 bar |
| Cooling water inlet temperature | 10–21 °C |
| Cooling water flow rate | 28–35 l/min |
| Maximum oxygen flow rate | 700 Nl/min |
| Maximum ethanol consumption | 40 l/h |
| Maximum nitrogen carrier gas flow | 20 Nl/min |
Et-Gun Integration with GST MP 30M-HV Mobile HVOF-LF System
The GST Et-Gun HVOF-LF Torch is designed for integration with the GST MP 30M-HV Mobile HVOF-LF System — a compact, fully integrated, and automation-ready coating platform developed for advanced industrial applications.
The complete system combines:
- Mobile and flexible installation concept
- Precision process control
- High-performance HVOF-LF technology
- Advanced monitoring and data acquisition
- Automation readiness for robotic coating cells
The MP 30M-HV with Et-Gun provides a complete solution for manufacturers requiring high-quality thermal spray coatings with maximum process reliability, efficiency, and operational flexibility.
GST Et-Gun — next-generation ethanol-fueled HVOF technology delivering cleaner coatings, superior performance, and sustainable industrial coating solutions.
GST Et-Gun HVOF-LF Torch
| No. | Article | Name | OEM Article No. |
|---|---|---|---|
| 1 | ST311045 | Spark plug assemЫy | 311.045 |
| 2 | ST311001 | F-Housing | 311.001 |
| 3 | ST311002 | O-Housing | 311.002 |
| 4 | ST311003 | Chamber housing | 311.003 |
| 5 | ST311004-02 | Pre-chamber НЕ s-1 | 311.004-02 |
| 6 | ST311005-01 | Combustion chamber s-2 | 311.005-01 |
| 7 | ST311006 | lnterconnector nut #1 | 311.006 |
| 8 | ST311007 | Adapter | 311.007 |
| 9 | ST311008-01 | lnterconnector s-2 | 311.008-01 |
| 10 | ST311009 | 4" Deflector | 311.009 |
| 11 | ST311010-22 | 4" Barrel s-10 | 311.010-22 |
| 12 | ST311011 | 4" Barrel housing | 311.011 |
| 13 | ST311012 | Barrel nut | 311.012 |
| 14 | ST311013 | 4" Water out tube | 311.013 |
| 15 | ST311014 | Water out fitting | 311.014 |
| 16 | ST311015 | lnterconnector nut #2 | 311.015 |
| 17 | ST311016-01 | Fuel injector assemЫy НЕ incl. 4х o-rings | 311.016-01 |
| 18 | ST311017 | Rearcover | 311.017 |
| 19 | ST311020-02 | Powder injector*10I s-20 | 311.020-02 |
| 20 | ST311029 | Fitting Powder Port*4I s-20 | 311.029 |
| 21 | ST311019 | Ferrule plastic *101s-20 | 311.019 |
| 22 | ST311018 | Nut ¼"" tube*4ts-20, incl. Ferrule plastic*4I s-20 | 311.018 |
| 23 | ST311035 | Bolts F-Housing*4 | 311.035 |
| 24 | - | DIN 912 socket head cap screw M4×50 | - |
| 25 | ST311034 | Bolts Barrel housing - Water out fitting*4 | 311.034 |
| 26 | ST311033 | Bolts O-Housing*2 | 311.033 |
| 27 | ST311032 | Bolt АМР Connector | 311.032 |
| 28 | ST311049 | АМР Washer | 311.049 |
| 29 | ST311062 | Dowel pin | 311.062 |
| 30 | ST311036 | Oxygen Check Valve s-1 | 311.036 |
| 31 | ST311040 | Fuel Check Valve s-1 | 311.040 |
| 32 | ST311041 | Nipple, 1/8" Fuel check valve to F- housing | 311.041 |
| 33 | ST311038 | Nipple, 1/8" Oxygen check valve s-1 | 311.038 |
| 34 | ST311037 | Adapter oxygen 45° ¼ NPT to O-Housing | 311.037 |
| 35 | ST311039 | Adapter, ¼" NPT | 311.039 |
| 36 | ST311042 | Adapter, 1/8" NPT | 311.042 |
| 37 | ST311043 | Adapter W45°, ¼" NPT | 311.043 |
| 38 | ST311061 | O-ring Fuel assy front*10 | 311.061 |
| 39 | ST311030 | O-ring F-Housing *10 | 311.030 |
| 40 | ST311021 | O-ring Water tube*10, Water out fitting*10 | 311.021 |
| 41 | ST311022 | O-ring lnterconnector*10 | 311.022 |
| 42 | ST311.023 | O-ring Barrel*10 | 311.023 |
| 43 | ST311060 | O-ring Fuel assy 3 *10 | 311.060 |
| 44 | ST311024 | O-ring Fuel assy 1 *10 | 311.024 |
| 45 | ST311028 | O-ring Front Barrel Nut*10 | 311.028 |
| 46 | ST311025 | O-ring Fuel assy, Comb. chamber 2*10 | 311.025 |
| 47 | ST311026 | O-ring O-Housing*10 | 311.026 |
| 48 | ST311027 | O-ring Chamber housing, Barrel housing and Deflector*10 | 311.027 |
| 49 | - | O-ring 3.9×1.78, 70 NBR | - |
| 50 | ST311048 | АМР Connector (М) | 311.048 |
| 51 | - | 6540 6 Tee fitting | - |
| 52 | - | C1/Z 4/2 M5 2351001 Straight connector with male thread and union nut, M5–4/2 mm | - |
| 53 | ST500001 | Power feed hose | 500.001 |
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