Class Seat Leakage
NEWS & RESOURCES FEBRUARY 10, 2021 Class Seat Leakage HYDRO TESTING – CLASS I to IVCLASS SEAT LEAKAGEThe term “Class” seat leakage comes from ANSI / FCI 70-2. This is a control valve seat leakage specification and does not apply to gates and globes used for on/off service. In ANSI / FCI 70-2, the forward states, “During …