This document is a product description of the FVUM and FVUG series filters of the Coval brand. The series filters have transparent oil tanks, which are convenient for observing the degree of contamination of the filter. The series filters have two specifications, M and G. The size of the M specification is 76.2*61.5*48*49.8mm, and the size of the G specification is 90.9*136.7*73.6*119.4mm. The series filters have G1/4 and G3/8 interfaces, and the working pressure is 1 to 10 Bar.