Common issues with airless spray tips
The biggest problem with airless spray tips is that they wear out! When you combine high pressure, high flow and abrasive materials something has to give. In this instance as the orifice of the tip wears, the spray pattern changes, deteriorating in finish quality. It starts as a stripe with parallel sides and rounded ends, changes to oval, becoming shorter and wider. Finally it turns into a round shape. On average a worn tip will spray 25% more paint and require 20% more labor. Worn tips cost time and money…
- A worn tip uses more paint
- Produces uneven coverage and inconsistent mil build
- Reduces production — requires more passes
- Results in a poor quality finish
Generally, airless spray tips are problem free, provided that they are replaced before becoming too worn. Very little negative feedback is reported by contractors using them.
Important considerations when choosing the right airless spray tips
The most important consideration when choosing an airless tip is matching tip to paint specification. The paint manufacturer will make a recommendation for orifice size and usually fan size as well. Generally speaking architectural coatings can be applied with a 4050 psi (279 bar) rated tip and heavy industrial coatings applied with a 7500 psi (517 bar) tip.
Another important consideration is ensuring that 4050 psi (279 bar) rated tip isn’t used on a 7500 psi (517 bar) rated pump. Maximum pressure specification have a safety factor built in to protect the operator against an injection injury. While it may be tempting to use a 4050 psi (279 bar) rated tip on a 7500 psi (517 bar) rated pump for cost or finish reasons, there is a substantial injury risk in doing so.