The GST F4VB-VPS Plasma Gun is a robust machine-mounted plasma spray gun designed for controlled-atmosphere coating processes, including Vacuum Plasma Spray (VPS) and Low Pressure Plasma Spray (LPPS). It is intended for installation inside a vacuum or controlled-atmosphere chamber where the process environment can be adjusted to reduce interaction between the molten spray material and ambient air.
The GST F4VB-VPS Plasma Gun is a robust machine-mounted plasma spray gun designed for controlled-atmosphere coating processes, including Vacuum Plasma Spray (VPS) and Low Pressure Plasma Spray (LPPS). It is intended for installation inside a vacuum or controlled-atmosphere chamber where the process environment can be adjusted to reduce interaction between the molten spray material and ambient air.
With a maximum power rating of 55 kW, the F4VB-VPS is suitable for industrial coating processes that require repeatable plasma conditions and controlled oxidation of the feedstock. The gun can operate with argon, helium, hydrogen and nitrogen process gases and offers multiple hardware configurations for adapting the plasma jet and spray pattern to different coating materials.
Powder is introduced by radial internal injection, which provides a compact and repeatable feed arrangement within the gun. GST offers F4VB-VPS powder injectors in 1.5, 2.0, 2.5 and 3.0 mm sizes, together with 6, 7 and 8 mm nozzle options. The selected injector and nozzle combination should be matched to the powder particle size, feed rate, plasma gas composition and required coating properties.
The controlled-atmosphere process makes the F4VB-VPS particularly suitable for oxidation-sensitive and high-performance materials such as titanium and MCrAlY alloys. Typical applications include turbine bond coats, high-temperature oxidation and corrosion protection, biomedical titanium coatings and other dense functional metallic coatings. The gun is suitable for integration with robotic manipulators and automated motion systems inside VPS/LPPS coating chambers.
Key benefits
- Up to 55 kW power capability for controlled-atmosphere plasma spray processes.
- Designed for Vacuum Plasma Spray (VPS) and Low Pressure Plasma Spray (LPPS) applications.
- Radial internal powder injection provides a compact and repeatable powder-feed arrangement.
- Compatible with argon, helium, hydrogen and nitrogen process gases.
- Multiple nozzle and powder injector configurations allow adaptation to different powders and spray patterns.
- Controlled processing atmosphere helps reduce oxidation and contamination of reactive coating materials compared with spraying in ambient air.
- Machine-mounted design suitable for robotic manipulators and automated motion systems inside coating chambers.
- F4-family service components and GST replacement parts simplify maintenance and lifecycle support.
Optional Accessories and Consumables
The GST F4VB-VPS Plasma Gun can be configured with interchangeable process hardware and maintenance components according to the feedstock, chamber conditions and required coating properties.
- 1.5 / 2.0 / 2.5 / 3.0 mm powder injectors
- 6 / 7 / 8 mm plasma nozzles
- Replaceable electrodes
- Gas ring and internal gas-distribution components
- Cooling tube and water-cooling components
- Front and rear gun-body components
- Front and rear locking rings
- O-rings, X-rings and replacement seals
- Blind plugs, fasteners and other service hardware
GST supplies replacement F4VB-VPS components and selected common F4-family service parts, allowing the gun to be maintained and reconfigured for different coating processes.
| No. | Article | Name | OEM Article No. | OEM Article No. |
|---|---|---|---|---|
| 1 | ST1069418 | Rear Gun Body Assembly | 1069418 | - |
| 2 | ST1069416 | Center Gun Body | 1069416 | - |
| 3 | ST1003421 | Front Gun Body | 1003421 | - |
| 4 | ST1003425 | Rear Locking Ring | 1003425 | - |
| 5 | ST1003419 | Front Locking Ring | 1003419 | 300.035 |
| 6 | GST-00106666 | Insulator Assembly | - | - |
| 7 | ST1003499 | Gas Ring | 1003499 | 300.018 |
| 8 | - | Cooling tube | 1003423 | 300.006 |
| 9 | ST1003512 | Insulating screw | 1003512 | 300.010 |
| 10 | GST-100025 | Insulator threaded bushing | - | - |
| 11 | GST-00106667 | Cover | - | - |
| 12 | GST-00106668 | Cover | - | - |
| 13 | 9120580A2 | Screw, DIN 912 M5x80 | - | - |
| 14 | ST1003514 | Screw, M4 x 25 | 1003514 | 300.003-01 |
| 15 | ST1003513 | Screw, M4 x 10 | 1003513 | 300.013 |
| 16 | GST-100089 | Screw | - | - |
| 17 | GST-100003 | Screw | - | - |
| 18 | - | Injector holder screw | - | - |
| 19 | GST-100059 | Washer (2 pcs.) | - | - |
| 20 | GST-100037 | O-Ring | - | - |
| 21 | ST1038940 | O-Ring, NBR | 1038940 | 300.061 |
| 22 | GST-100039 | O-Ring | - | - |
| 23 | GST-100040 | O-Ring | - | - |
| 24 | ST1000359 | O-Ring, Black Viton | 1000359 | 300.007 |
| 25 | ST1001434 | O-Ring, Buna | 1001434 | 300.005 |
| 26 | GST-00104533 | X-Ring | - | - |
| 27 | ST1072006 | Electrode | 1072006 | 300.008 |
| 27 | ST1072006 | Electrode | - | - |
| 28 | GST-00104400 | Nozzle, 2 x 180° / 10° 4mm / Ø6 mm | - | - |
| 28 | GST-00104397 | Nozzle, 2 x 180° / 10° 4mm / Ø7 mm | - | - |
| 28 | GST-00104401 | Nozzle, 2 x 180° / 10° 4mm / Ø8 mm | - | - |
| 29 | GST-00097986 | Powder Injector, 1.5 mm | - | - |
| 29 | GST-00097988 | Powder Injector, 2.0 mm | - | - |
| 29 | GST-00097989 | Powder Injector, 2.5 mm | - | - |
| 29 | GST-00097990 | Powder Injector, 3.0 mm | - | - |
| 31 | GST-100057 | Blind plug | - | - |
Applications
The GST F4VB-VPS Plasma Gun is intended for controlled-atmosphere plasma spray applications where oxidation control, coating purity and repeatability are important, including:
- MCrAlY bond coats for gas-turbine and high-temperature components.
- High-temperature oxidation- and corrosion-resistant metallic coatings.
- Titanium coatings for biomedical and other applications requiring controlled processing of reactive materials.
- Bond coats for thermal barrier coating systems.
- Dense metallic and alloy coatings produced under reduced-pressure or inert conditions.
- Functional coatings for aerospace, energy and chemical-processing components.
- Multilayer coating systems requiring controlled-atmosphere deposition.
FAQ
What is the GST F4VB-VPS Plasma Gun used for?
The GST F4VB-VPS is designed for controlled-atmosphere plasma spraying, including VPS and LPPS processes. It is used when coating quality benefits from reduced exposure of the molten feedstock to ambient oxygen and other reactive gases.
What is the maximum power of the F4VB-VPS Plasma Gun?
The F4-VB platform is rated for a maximum power of 55 kW.
Which plasma gases can be used with the F4VB-VPS?
The gun can operate with argon, helium, hydrogen and nitrogen process gases. The final gas composition depends on the feedstock, gun hardware and required coating properties.
How is powder injected into the F4VB-VPS plasma jet?
The F4-VB uses radial internal powder injection. This arrangement introduces the powder within the gun/nozzle region for repeatable interaction with the plasma jet.
What powder injector sizes are available from GST?
GST lists F4VB-VPS powder injectors in 1.5, 2.0, 2.5 and 3.0 mm sizes. Injector selection should be matched to powder particle size, feed rate and process conditions.
What nozzle sizes are available for the GST F4VB-VPS?
GST lists 6, 7 and 8 mm nozzle configurations for the F4VB-VPS platform.
Why use the F4VB-VPS instead of an atmospheric plasma spray gun?
A controlled-atmosphere or reduced-pressure process can reduce oxidation and contamination of reactive feedstocks and is therefore used for materials and coating systems that require tighter atmosphere control than conventional APS.
Is the F4VB-VPS suitable for robotic spraying?
Yes. The gun is machine-mounted and is intended for integration with robotic manipulators and automated motion systems inside controlled-atmosphere coating chambers.
What materials are typically processed with the F4VB-VPS?
Typical applications include MCrAlY alloys, titanium and other metallic or reactive feedstocks used for turbine, biomedical, high-temperature and functional coating systems. Final process parameters should be selected for the specific material and application.
|
Spray configuration
|
Straight / axial spray |
|
Gun type
|
Machine-mounted conventional DC plasma spray gun |
|
Maximum power
|
55 kW |
|
Powder feed
|
Radial internal powder injection |
|
Nozzle diameter
|
6 / 7 / 8 mm (GST configurations) |
|
Cooling medium
|
Water |
|
Powder injector diameter
|
1.5 / 2.0 / 2.5 / 3.0 mm (GST configurations) |
|
Coating materials
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Metals, metallic alloys, MCrAlY, titanium and other process-compatible powders |
|
Gun weight
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Approx. 2.0 kg |
|
Powder injection arrangement
|
Internal radial injection |
|
Installation
|
Vacuum chamber / robotic manipulator / automated motion system |
|
Controller compatibility
|
ChamPro controlled-atmosphere system |
|
Operating environment
|
Reduced-pressure / inert controlled atmosphere |
|
Feedstock form
|
Thermal spray powder |
|
Electrode
|
Replaceable tungsten electrode; GST replacement variants available |
|
Service parts
|
Gun bodies, locking rings, gas ring, cooling tube, seals, electrode, nozzles and injectors |
|
Nozzle options
|
Interchangeable process nozzles for different plasma conditions |
|
Typical process objective
|
Dense coatings with reduced oxidation of reactive materials |
|
Automation
|
Suitable for programmable robotic and manipulator-based coating cycles |
|
Process
|
Controlled Atmosphere Plasma Spray; VPS / LPPS |
|
Plasma gases
|
Argon (Ar), Helium (He), Hydrogen (H2), Nitrogen (N2) |
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