Appendix A
Critical Seat and Disc Dimensions
11
Use these dimensions when lapping and/or refacing is required. Parts must be replaced if the minimum dimen-
sion is reached as indicated in the drawings.
General Notes:
1. All dimensions are in inches.
2. Minimum dimension for body applies to both metal and O-ring seat designs.
ORIFICE
SIZE
A
B
1/2 x 1
C
3/4 x 1
0.344
0.985
1 x 1
C
1/2 x 1
(High
3/4 x 1
0.344
0.985
Pressure)
1 x 1
1/2 x 1
D
3/4 x 1
0.344
0.985
1 x 1
D
1/2 x 1
(High
3/4 x 1
0.344
0.985
Pressure)
1 x 1
E
1 x 1 1/2
0.363
0.821
F 1 1/2 x 2
0.734
0.950
G 1 1/2 x 2 1/2
0.738
0.910
B
A
DISC
BODY
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Visit www.boighill.com to request a quote.
