MPC Varnish Potential Testing
Membrane patch colorimetry (MPC) varnish potential testing (ASTM D7843) is an essential analytical test to determine the propensity for a lubricant to form varnish deposits.
Resistivity, Fact or Fiction?
Resistivity is a critical performance indicator for phosphate ester (PE) fluid quality. Low resistivity values are associated with electro kinetic wear, a common failure mechanism of servo valves.