A-Flame Corporation
Velocity Master HVAF Spraying System
HVAF is the acronym for High Velocity Air Fuel. The system operates at Mach 2 particle velocity, and efficiently sprays cermets, metals and metal alloys, including self-fluxing alloys.
It is 100% air-cooled, no need for a chilled water supply.
There is nearly zero oxidation of sprayed material
Low consumption of spare parts
The system is Forgiving of operator error
Light-weight at 4.2 lb (1.9 kg)
Low operating cost
The gun's combustion chamber is optimized for operation with natural gas, which allows for a dramatic operating cost reduction, while providing good deposition efficiency. The gun is not susceptible to nozzle clogging; and, it can operate for hours without interruption.
The non-clogging nozzles come in several choices, the longest nozzle is used for spraying cermets; two shorter ones are used for spraying metallic powders. Optional, smaller diameter, lower-thrust nozzles are available for manual spraying of cermets and metals.
· Supported Fuels: Propane, Propylene, ( comes optimized for) Natural Gas, and MAPP-Gas.
· Air: 200 SCFM @ 125 PSI
· Particle Velocity: 2000-2150 ft/sec (600-650 m/sec)
· Deposit Efficiency: Carbides 50-75%, Metals 60-85%
· Max Hourly Spray Rate: Carbides 50 lb (22.7 kg), Metals 45 lb (20.4 kg)
The streamlined design of the gun simplifies its use with robotic systems. The powder stream is very narrow (resembling a laser beam), but can be adjusted by changing the powder injector to correspond to the desired spray area.
· Precise control of operating parameters
· Touch screen operator interface
· Large recipe storage
· Real time monitoring of process variables
· Timers for tracking system operation Modular hardware design
· Highly mobile (can be used on site)
· Robust and reliable Compliant with ATEX safety directives
· Optional data acquisition module with software
The Control Console monitors the process, and automatically sequences all of the functions required to start/stop the gun, and accurately maintains the preset operating parameters.
The program shuts down the system if it becomes unable to maintain preset parameters, or if abnormal situations occur. A modular hardware design simplifies system maintenance. The system features an advanced touch screen user interface and user-friendly window-based screens for ease of operation and system monitoring. The Control Console features separate gas and electrical compartments, with air purging in the gas distribution cabinet.
Website: http://www.aflame.com/
8175 Kroger Farm Road, Cincinnati, OH 45243-1639 USA Tel 1(513)831-4284 Fax 1(513)831-5237 E-Mail
Velocity Master Powder Feeder
· Pulse-free Powder Feeder
· No wearing Seals
· Closed Loop Feed Rate Control
· Digital Read out
Large canister capacity:
610 cubic inches (10 L) optional
300 cubic inches (5 L) standard
Closed loop precise feed rate control Feed rates 0 – 100 lb/hr (45 kg/hr)
Canister pressure up to 500 psi (34 Bar)
Local control and remote control interface
Precise digital read out
Heat blanket with on/off control
This is a heavy duty, high-capacity powder feeder that was designed specifically to accommodate the high spray rates of the HVAF spray guns; however it is fully compatible with all other thermal spray processes, such as plasma spraying, HVOF, cold spray, and other industrial applications.
The feeder’s main feature is its very high reliability, as it does not have wearing seals. It provides pulse-free feeding of all thermal spray powders.
All systems may be leased (within the US only). This system may be leased with a $1.00 buyback, at the close of the lease. Your lease may include installation, setup, training, transportation, and your first order of consumables.
Website: http://www.aflame.com/
8175 Kroger Farm Road, Cincinnati, OH 45243-1639 USA Tel 1(513)831-4284 Fax 1(513)831-5237 E-Mail
The question has been asked, “What is the difference between HVAF and HVOF?”
First - What is the HVAF Process
High Velocity Air Fuel (HVAF) is a deposition process, for forming high-quality coatings of metals, alloys, carbides and borides, on various substrates.
The powder is fed into a spray gun. The process within the gun, combusts compressed air and fuel gas (propane, propylene, natural gas, etc.) generating a high-velocity jet. The powder is heated and accelerated so that when it impacts with a workpiece (substrate), it forms a coating that bonds tightly with the metal.
The combustion temperature of the air-fuel mixture is relatively low; so, it is possible to gradually heat the powder to the desired temperature, preferably a few degrees below its melting point, spraying the coating in a "softened particle" mode. The HVAF gun accelerates the powder to a very high velocity, even heavy powder particles as tungsten carbide. This is essential for producing dense and well-bonded coatings.
HVAF vs. HVOF
1. HVAF uses compressed air, instead of oxygen. (Lower cost of operation)
2. The gun is Air-cooled; no water chiller is required. (Lower cost of operation)
3. Cooler spraying conditions, which is an advantage in some cases, where the process leans more to
kinetic than thermal bond - better for tungsten carbide based coatings, and for coatings with much less
oxidation.
4. The system is set up to use natural gas, which is less costly than propane, hydrogen or other fuels.
5. It requires very little maintenance, and has a low consumption of spare parts - (lower cost of
operation)
6. Premium coating quality - Near zero oxidation of sprayed material.
7. Good deposition efficiency – about 70% for NiCr. (lower cost of operation)
8. High spray rate – about 45 lbs. per hour for NiCr. (lower cost of operation)
9. The cost of production HVOF and HVAF systems is about the same.
10. 100% Duty Cycle for HVAF means less downtime, and more throughput of product.
Website: http://www.aflame.com/
8175 Kroger Farm Road, Cincinnati, OH 45243-1639 USA Tel 1(513)831-4284 Fax 1(513)831-5237 E-Mail