While other compatible types are often available at extra cost, there are spray gun kits that include several different nozzles. Some HVLP spray guns come with just a single general-purpose nozzle. Some car body primers need a 3-millimeter nozzle hole. High viscosity (thick) materials like latex paint need a larger hole, around 2 or 2.5 millimeters. Low viscosity (thin) materials like wood stain may only need a very small hole, perhaps 1 millimeter. Every stain, varnish, primer, and paint has its own viscosity, which indicates the thickness of the liquid. To get the best possible finish, it may need to be changed from one project to the next. The size of the central hole is usually measured in millimeters, and it’s extremely important as it determines the kind of material that can be sprayed. It also has two “horns” on either side that force air into the fluid stream and atomize it, turning it into a fine spray. Fluid NozzleĪt the business end of an HVLP spray gun, there is the fluid nozzle or air cap with a central hole for the fluid to spray through. However, that’s not usually an option with turbine models, so it’s an important feature to check before buying. With professional models, it is possible to purchase a longer hose. ![]() They do have more of a learning curve, but the quality of finish can be virtually flawless.īoth turbine and compressor-driven spray guns need a hose to deliver air, but a short hose can prove restrictive. They also are fast, so this may be the best choice for regularly painting large areas. The big advantages of professional HVLP spray guns are the increased adjustability and long-term durability. However, even relatively small compressors aren’t particularly portable and need regular maintenance. Because these are “low pressure” spray guns, they don’t need a large compressor and many home users may already own a suitable model. Compressor-driven models are full-on professional tools often found in automotive body shops.They can be used for rooms, but they’re a relatively slow choice for a whole house. Turbine HVLP spray guns are great for furniture work, small decks, and siding. ![]() The turbine is a relatively lightweight unit, but it can be a larger machine to move around.
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