Pressure-Assist means that a 1.0 mm nozzle sprays as fast or faster than a conventional HVLP gun with even a 1.5 mm nozzle. LEX-AIRE takes a small amount of air from inside the air cap to pressurize the cup to about 3 or 4 psi. This pressure is held in the cup by a cleanable metal check-valve. A pressurized cup means that the paint flow is consistent from start to finish. This does not happen with the LEX-AIRE pressurized cup.
Many people have problems with their conventional nylon cups leaking.
LEX-AIRE solves this problem in two ways. First, there is a floating aluminum gasket plate inside the lid. This way the cup seals on the gasket, not on the threads. Secondly, a stainless steel clamp on the lid maintains the dimensional integrity of the lid through wide pressure ranges.