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How to Measure Coating Dry Film Thickness
“How can I measure my coating dry film thickness?” It is important to apply coatings within the coating manufacturers recommended Dry Film Thickness (DFT). Too little DFT and the coating may fall short of providing the proper protection, whereas too much DFT may cause mud cracking in the film, or unnecessary use of costly coating materials. There are two ways to check dry film thickness. The first is by using a measurement instrument, and the second by compiling the wet film thickness and doing a simple math calculation. Dry film thickness instrument technologies range from: comparative, magnetic, or electronic. The mechanical comparative...
WHEN NOT TO USE TEFLON TAPE
Teflon tape is one of those great new products from the early 70’s. A customer’s recent stubborn coating leak confirmed why we discourage the use of Teflon tape on fluid fittings. In the wet coating industry there are two types of threads NPT (National Pipe Tapered) and NPS (National Pipe Straight). The industry standard in the wet coating business has the tapered NPT tread used on air connections and the straight NPS thread on fluid connections. The NPT thread design makes the seal between the male and female tapered threads on the air fittings. Where as the NPS design has...
“What Maintenance Do You Recommend For Our Spray Booth?”
The following spray booth maintenance schedule includes the Federal and Fire Marshall Requirements because they are intermixed with the mechanical maintenance. WEEKLY The exhaust filter manometer gauge should be checked. When the resistance across the dirty exhaust filters exceeds .5 inches of resistance from when the filters were new, change the exhaust filters. At the same time, vacuum the booth exhaust chamber. As needed clean the floor and/or replace the flame resistant floor paper, and replace any burned-out tubes. QUARTERLY In addition to the weekly maintenance, the wall-mounted water and coalescing compressed air filter elements should...
An Often Asked Question...how much paint is flushed when cleaning out a 25' paint hose?
1/4" I.D. hose - 8.2 oz./.24 Liter 3/8" I.D. hose - 18.4 oz./.54 Liter 1/2" I.D. hose - 32.6 oz./.96 Liter
“My Paint Gun Sputters and I’m Using a Pressure Pot"
We have fielded several of these “sputtering calls” recently. In most cases, the customer tells us they think they are getting air mixed with their paint impacting fluid flow. Yes air can get into a paint line even with a closed-loop system, such as a pressure pot. The most common cause of pressure feed lines sputtering is a variation in tank pressure because paint has migrated into the pressure pot regulator or plugged the passage below the regulator. Sometimes the cleaning of the passage or regulator is all that is necessary to fix the problem. Other times the regulator needs to be...
