The GST MP 30M-HV Mobile HVOF-LF Spray System is a compact, fully integrated liquid fuel high velocity oxy-fuel (HVOF-LF) coating solution designed for the application of advanced protective coatings in both industrial workshop environments and field service operations.
The GST MP 30M-HV Mobile HVOF-LF Spray System is a compact, fully integrated liquid fuel high velocity oxy-fuel (HVOF-LF) coating solution designed for the application of advanced protective coatings in both industrial workshop environments and field service operations.
The system supports operation with ethanol or kerosene-based fuel configurations, providing a flexible and efficient platform for high-performance thermal spray applications requiring superior coating density, hardness, wear resistance, and corrosion protection.
The key advantage of the MP 30M-HV is the integration of all essential system components into a single industrial-grade mobile platform, including the process control cabinet, gas management system, fuel supply system, cooling-water circuit, powder feeding system, and power distribution module. This monoblock design significantly simplifies installation, reduces commissioning time, and provides exceptional mobility while maintaining industrial-level performance, process stability, and operational reliability.
The system features an open and flexible control architecture, enabling seamless integration into automated robotic coating cells. Depending on customer requirements, the system can be expanded with additional peripheral equipment, including:
- Industrial robots
- Workpiece positioning systems
- Soundproof spray booths
- Ventilation and filtration systems
- Advanced process monitoring equipment
The modular concept allows the MP 30M-HV to be configured as a mobile manual coating workstation or upgraded into a fully automated HVOF production cell capable of meeting demanding industrial coating requirements.
Main System Features
- Closed-loop mass flow control system for precise regulation of all process gases
- Integrated liquid fuel supply and control system for HVOF-LF operation
- High-pressure cooling water circulation system with continuous monitoring
- Remote access module for diagnostics, maintenance, and technical support
- Advanced PLC-based control platform for precise process management
- Intuitive touchscreen HMI for parameter adjustment and real-time monitoring
- Comprehensive process data acquisition, visualization, and reporting
- Multi-level password-protected user access management
- Complete process data recording for full coating traceability and analysis
- Advanced Software Platform
The advanced software platform of the GST MP 30M-HV provides intuitive operation, complete process transparency, and reliable long-term performance. All critical process parameters are continuously monitored and displayed in real time, ensuring accurate control of the HVOF-LF process and maintaining consistent coating quality.
The software architecture has been developed with future expansion capability, allowing integration of additional HVOF torches and auxiliary systems beyond the standard configuration.
Each supported torch configuration has predefined operating limits and approved parameter ranges stored within the control system. This intelligent protection system prevents operation outside validated conditions, improving:
- Process reliability
- Equipment safety
- Coating repeatability
- Overall system efficiency
Process Cabinet
The process cabinet integrates all major functional modules of the HVOF-LF system, including:
- Gas supply and regulation module
- Process control and distribution module
- High-pressure cooling-water circulation system
- Liquid fuel supply module
- Electrical control module
The cabinet is mounted on a mobile platform, providing convenient transportation and flexible deployment in both production facilities and field environments. The compact design ensures maximum installation flexibility while maintaining industrial-grade protection, reliability, and ease of maintenance.
Gas Supply Module
The gas supply module is a critical subsystem responsible for the precise delivery, regulation, and monitoring of process gases required for HVOF operation.
Stable gas control directly influences:
- Combustion stability
- Flame velocity
- Particle acceleration
- Coating density and quality
- Process repeatability
Control and Distribution Module
The control and distribution module provides the interface between the main process cabinet and the HVOF torch. The module manages all essential process connections, including:
- High-pressure oxygen supply lines for HVOF operation
- High-voltage ignition circuit
- Liquid fuel supply lines for HVOF operation
- Cooling-water circulation circuits
The optimized design ensures reliable operation, simplified maintenance, and stable HVOF-LF process performance.
Electrical Control Module
The electrical module contains the PLC-based hardware and software responsible for controlling and coordinating all system functions.
All critical operating parameters are managed through closed-loop control algorithms, ensuring:
- Maximum process stability
- High repeatability
- Consistent coating performance
- Safe system operation
Powder Feeding System
The powder feeder is based on a precision rotating disk dosing mechanism designed for accurate and stable powder delivery. Powder feed rate is controlled by the rotational speed of the dosing disk and can be continuously adjusted throughout the operating range.
The system design prevents powder overfilling in the dosing channel, while the suction-based powder extraction mechanism ensures efficient transfer of powder into the carrier gas stream and reliable delivery to the HVOF torch.
Carrier gas flow is precisely regulated using a high-accuracy mass flow controller. The powder hopper filling level is continuously monitored using a strain-gauge load sensor integrated into the hopper support base, with real-time indication provided on the operator interface.
Et-Gun HVOF Torch
The GST Et-Gun HVOF Torch features an advanced combustion chamber design providing extremely high gas velocities through operation at elevated combustion pressures of approximately 13 bar. The optimized nozzle geometry creates a supersonic exhaust jet and a low-pressure zone where powder particles are injected and accelerated.
The high combustion pressure enables the production of dense, low-porosity coatings with excellent bond strength and high microhardness.
Advantages of Ethanol-Based HVOF Technology
Compared with conventional kerosene-based HVOF systems, ethanol fuel technology provides several significant advantages:
Lower Operating Costs
- Ethanol has a competitive market price compared with kerosene
- Reduced oxygen consumption
- Lower cooling system power requirements
Global Availability
- Ethanol is produced worldwide and is readily available in most industrial regions
Process Stability
- Ethanol provides stable and repeatable combustion characteristics, ensuring consistent coating properties
- Cleaner Coatings, no carbon contamination from combustion products
- High-quality coatings can be produced even under fuel-rich operating conditions
Improved Operating Comfort
- Smoother ignition and shutdown cycles
- More stable operation
- No kerosene odor during operation
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 |
GST MP 30M-HV Mobile HVOF-LF System
A compact, fully integrated, and automation-ready HVOF-LF coating platform designed for advanced industrial applications — combining mobility, precision process control, high coating performance, and reliable operation in a single solution.
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