Pump Wink Comparison

Tests performed using water and Nordson® A7A airless guns and proprietary Cross-Cut nozzles.

 
Pattern collapse with traditional technology

 
Pattern collapse with PermaFlo®  830 pump

The ScoreGuard® Coating Advantage

Twice has hard as conventional hard chrome plating, ScoreGuard coating has excellent corrosion resistance and is warranted for two-years to provide maximum pump life for superior durability and operating performance.

Plunger coating comparison

Test results show the ScoreGuard coated plunger polished to mirror-like finish after 24x the cycles of conventional hard-chrome-plating.

Chrome plating vs.. ScoreGuard coating

In the process to achieve high hardness values with conventional hard chrome plating, several inherent traits like microcracking, high internal stresses and surface imperfections, limit its service life. This can lead to plunger material that more easily scores and eventually results in upper packing leakage and shorter wear life.

Nordson's patented ScoreGuard hard-coating process used on plungers and housings eliminates these concerns and significantly improves wear life. The high hardness, low coefficient of friction and low residual stress levels of the coating combine to resist abrasive wear and galling. This results in superior performance and toughness over other coatings used in wear applications.