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Consider Material Viscosity and Flow

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7:58
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HVLP Sprayer Options | Cups vs Pressure Pot

What happens here

When dealing with very thick or heavy materials, especially modern waterborne and latex paints, a gravity feed system is generally preferred. The added assistance of gravity helps these viscous materials flow more easily to the nozzle. Siphon feed systems, particularly with lower pressure turbine systems, struggle to pull thick materials up against gravity, leading to reduced flow rates and smaller fan patterns. To overcome this with a gravity feed cup, pressure is often applied to the cup.

Tools and materials

  • Gravity Feed Spray Gun
  • Siphon Feed Spray Gun
  • Thick/Heavy Paints (e.g
  • waterborne
  • latex)

What they say

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really thick heavy materials is really necessary because we not only need gravity to help us but we need the pressure and gravity to help us the main reason is with the turbine systems we don't have the pressure that a lot of conventional compressed air systems in that have and as a result they form a siphon in the front of the gun with which actually pulls your paint into the nozzle because of the low pressure with the turbine systems we don't have that siphon anymore and that's why we have to pressurize the cup I could spray certain very thin materials with a gravity cup and no pressure but I'd end up with a very tiny small fan pattern and I would end up with a very slow uh flow rate on my material so in order to keep the flow rate and the fan pattern sizes uh equivalent to what you would get with other types of spray equipment you need to have the pressure on here to be able to realistically use it in a in an everyday environment would you say that um the gravity cup has Maybe be an advantage if you only had small amounts of really expensive material using a gravity cup a Sion cup for sure so with the gravity with the bottom cup you're always going to be left with a residue of material that's left over because even with the angled pickup tube it's not going to pick up all the material in there because once the pickup tube is no longer immersed in the bottom in the paint anymore there's nothing for it to pull pull it up with the gravity and

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