SY0643 Water Resistance Spray Tester for Grease Spray‑Resistance Test ASTM D4049 This SY0643 grease water‑spray resistance test equipment operates on the following working principle: apply lubricating grease evenly onto a stainless‑steel test panel, then subject the sample to water spraying under predefined temperature and pressure settings. Once the 5‑minute testing cycle finishes, calculate the percentage weight loss of the grease sample caused by water spraying; this
