The selection charts below provide a guideline which should help you decide which Lemmer tip size and filter is most appropriate for the product you are spraying. Viscosity was measured using a Lemmer viscosity cup. Tip wear can only be estimated because materials in paint vary to suit each application the paint is designed for. These paint materials may be highly abrasive or require higher spraying pressures which each contribute in a greater or lesser degree to tip life. This is especially noticeable with large tips and very heavy coatings.
Low pressure equals longer life, for tips and the pump.
Worn tips waste paint and overwork the pump, causing premature pump wear. The maximum tip for a pump is the largest tip that will deliver a proper pressure for spraying without overworking or overloading. When a tip is used for some period of time, it can wear beyond the maximum size recommended for the pump, which will cause low pressure and a poor spray pattern. Stains and thick latex products often cause the most rapid wear of the tip, while clear lacquers and varnishes cause the least wear. Thus tip life can vary from as little as 50 gallons to as much as 200 or more, depending on the product being sprayed and the pressure used.