Flowserve 1888 Double-Disc Gate Valve - Manual (Page 18)

18
Flowserve gate valves are supplied with a crowned sealing surface on the seat in order to provide precise seat width and tight sealing.
Lapping of the seat will cause the sealing band width to be significantly increased. After all seat refinishing operation, the seat width must
be checked against the dimensions supplied below and reduced if necessary. Failure to do so could create leakage problems, particularly
at lower pressures.
SEAT RING
F
VALVE SIZE
F
1888#
1/2" .062
3/4" .062
1" .062
1-1/4" .062
1-1/2" .062
1-3/4" .062
2" .062
1888-lb. Double-Disc Gate Valve FCD ADENIM0001-00