No Spark Discharge Filters

Filter sparking is a little known problem within high-pressure filtration systems.  Normally, the evidence relating to filter sparking is confused with micro-dieseling or dirt ingression.  The consequences of filter sparking are similar to these issues, but there often tends to be a noticeable "clicking" or "tapping" sound emanating from the filter vessels and visible burn-marks on filter parts.

The electrical discharge, or sparking, is caused by a similar process as walking across a carpet and touching a metal surface.  The high flow rate of fluid through the majority of the mechanical filters on the market causes friction, which, in turn, builds the electrical charge one the filter.  Eventually, the charge becomes so large that a spark occurs from the filter to the grounded filter housing.  The problem is all lubricants are affected by the temperatures reached beside these localized sparks.  The sparks can have temperatures upwards of 10,000 degrees Celsius.  At these temperatures, lubricants instantly breakdown and produce detrimental by-products.

EPT/Hy-Pro No-Spark Discharge (NSD) filters provide the same filtration efficiency as standard filters, but supress all possibility of filter sparking.  Many other no-spark filter elements reduce sparking by increasing the micron rating of the filter (strainer), but the NSD design allows down to a 3 micron absolute rating.  See specification sheet for more information.