Thursday, February 4, 2010

SPRAY PAINTING APPLICATIONS

SPRAY PAINTING APPLICATIONS

Heavy duty spray painting applications of high build two component polyurethane coating

MEDIUM DUTY AIRLESS SPRAY PAINTING

Airless Spraying is also known as high pressure or hydrodynamic spraying, i.e the spraying material is atomised by means of high pressure without the use of compressed air. Airless spraying is highly economical and has less pollution effects. A single spraying operation produces high coating thickness and high performance characteristics. The use of solvents is cut to a minimum, because highly viscous materials can be applied directly. There is hardly any overspray or spray mist with the envionment remaining clean. Our equipment stands for superb performance quality and meets all technical requirements Their advanced design and conception correspond to all applicable safety specifications and regulations. Sophisticated engineering, functional dependability, and easy handling are only few of the outstanding features of these equipments. All Tiger range equipments are in Stainless Steel 304 suitable for water-based paints and also available in high quality steel versions (Like 316, Food Grade) on customer request including high-pressure filter, hoses, hand spray guns and airless nozzles. The airless pump, Tiger 28.20 & 28.40 are the smallest models of its kind and particularly suitable for craftsmen as additional unit, or for minor industrial painting jobs. The Tiger 30.70 model qualifies for the machine building, electrical, furniture, steel and vehicle industries. The Tiger 40.110 model is suitable for highly viscous material. The Tiger 30.150 has been designed for high performance purposes and feeds large type nozzles or several spray guns at a time.
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HEAVY DUTY AIRLESS SPRAYING EQUIPMENT

In order to ensure a long life tungsten carbide and self-adjusting packings have been used. The entire unit is mounted on a rigid cart on large wheels. The tube type construction of the cart is intended to embrace and pump and to protect it during transportation or lifting up by crane.
These units are available with options such as air-line regulator kits comprising oil and watered separator, pressure reducer, lubricator and gauge as well as safety valve, nozzle clean out device, suction hose with strainer high pressure filter, 10m high pressure hose, spray gun. Maximum working pressure input at 6 bar.
These units are wear resistant and ice free, having a reversing system with integrated rapid exhaust.Its high performance silencers ensure high degree relaibilityand adherance to applicable regulations.
The air powered airless model rhino has been designed to withstand toughest working conditions as can be found at shipyards, steel construction plants, freight car manufacturing plants, or bridge building sites.
Rhino pumps come in various versions: hydraulic pressures up to 450 bar corresponds to relative transfer volume up to 550 cc /cycle so that even with several spray guns and long material hoses considerably high spray pressures can be obtained.
Rhino pumps are in Stainless Steel 410 and also available in high quality steel versions (SS 304, SS 316, Food Grade, etc) on customer request. These pumps are also available as stationary units for wall mounting.

AIRLESS HOT SPRAYING
Ambient temperatures are sufficient for traditional airless cold spraying.
If, however, highest requirements are to be met with view to economy, working hours, film thickness, regularity and evenness of the coating, airless cold spraying will not suffice unless one implies its alternative: airless hot spraying. This method is particularly suited for materials that will not yield satisfactory results when being used cold. For example, a highly viscous synthetic resin varnish can be applied with the cold airless system at 180 bar with unsatisfactory results. After heating the material up to 80°C, it can be used at 40 bar yielding an even and regular coating.
In comparison with airless cold spraying, airless hot spraying means a cut in solvents. Even the most viscous materials spray without solvents at 40 bar pressure when sufficiently heated.
All airless hot spraying units are available with high pressure filter, material hoses, hand spray guns, and airless nozzles. All units are corrosion resistant.

INLINE PAINT HEATER
Inline paint heater is the integral part of airless hot spraying unit. It is flameproof version as per IS 2148-1981 and weather proof protection IP55.as per IS 13947-1993
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AIR ASSISTED (AIRLESS PLUS) SPRAY PAINTING

The Airless Plus system performs a two fold function: conventional compressed air spraying and airless spraying at a time. Spraying materials such as paint, lacquer, or stripping agents are applied by an airless spray gun being equipped with fine adjusting air nozzles to assist the spray jet on either side. Besides an improved spray pattern the airless plus system offers following advantages:
Superb surface quality and negligible orange peel effect.
Upto 20% material economy compared to ordinary airless systems, because optimum atomisation reached at low material pressure.
Using combined compressed air and airless spray results in an almost entire suppression of rebouncing spray mist. This system also permits positive spraying of grooves, recesses and sinkings.
No side runs when using highly viscous materials.
Our Airless Plus units are available in portable mobile and stationary version with large type high pressure filter, high pressure hose, Airless Plus gun and nozzle. All wetted components are made of stainless steel 304. For the Airless Plus system, we suggest the following types of airless pumps:
Hippo 4.90 : For low viscosities and average flow rates (stains and transparent lacquers). Airless Plus only.
Tiger 12.150 : For low and average viscosities at high flow rates (stains, transparent lacquers). This pump also qualifies for manual and automated installations using one or more spray gun: it is less suitable for pure airless spraying.
Tiger 28.40 : For low and average viscosities at low flow rates (stains, transparent lacquers, cellulose lacquers, primers, pigmented lacquers). Suitable for both airless and airless plus.
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AIR (ASSISTED) SPRAY

The air spray gun uses air at 2 to 6 bar to atomize the paint into a fine spray. This produces a smooth finish, and can be used on many surfaces. Air spraying is versatile; the operator can vary their pressure, air volume, paint pressure, and spray pattern. With a transfer efficiency of 30 to 60%, air spraying produces a lot of over spray (the paint that missed the intended target) causing preparation and clean-up to take more time.
A High Volume Low Pressure (HVLP) spray gun uses higher volume of air at only 0.6 bar. This reduces the over spray, increasing the transfer efficiency. An HVLP gun is portable and easy to clean, and has a lower risk of blowback to the worker. However, the atomization may not be good enough for fine finishes, and production rates when using HVLP may not be as high as with conventional spraying.
V R Coatings does not manufacture spray guns for these applications but provides suitable pumps and other accessories for this application.
Hippo 1.170 the diaphagram pump is suitable to feed two air spray gun without pulsation with accessories like low pressure filter, regulators etc.
Hippo and elephant range of pumps are used to feed air spray guns
Hippo 3.400, 2.900, 5.900 these pumps are suitable for localized booth side paint circulation and to multiple air spray guns with accessories. Elephant range of pumps are used to feed centralized paint circulation and to multiple (in big quantity) air spray guns with accessories.
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ELECTROSTATIC AIR SPRAY GUN

V R Coatings is the sole authorized representative of ASAHI-SUNAC Japan and sells world''s lightest weight electrostatic spray guns for Indian market on its behalf.

1 comment:

  1. The blog was absolutely fantastic! Lot of great information which can be helpful in some or the other way. Keep updating the blog, looking forward for more contents...Great job, keep it up..
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