Goulds Pumps 3420 - IOM - Manual (Page 64)

WEAR RINGS
The clearance between the casing wear rings (127) and the impeller wear rings (142) is shown in.
When hydraulic performance is reduced substantially, the casing and/or impeller wear rings should be
replaced.
60
3420 IOM 8/09
Table 9 (inches)
Group
Impeller
Size
Material Vanes
Standard Impeller
and Casing Wearing
Rings (Fig. 51)
Flashed Impeller Wearing Rings
(Fig. 52)
Impeller
Ring (A) Casing
Ring
Diameter
Clearance
Impeller
Ring (C) Casing
Ring
Diameter
Clearance
Length
(E)
Angle (F)
SX
12x14-15
Iron & Bronze 7
11.214 11.227 .013 11.214 11.227 .013
.38 8°
11.212 11.229 .017 11.212 11.229 .017
Steel 7
11.214 11.237 .023 11.224 11.237 .023
.38 8°
11.212 11.239 .027 11.222 11.239 .027
16x18-17H
Iron & Bronze 7
13.970 13.983 .013 13.970 13.983 .013
.50 8°
13.968 13.985 .017 13.968 13.985 .017
Steel 7
13.970 13.993 .023 13.970 13.993 .023
.50 8°
13.968 13.995 .027 13.968 13.995 .027
MX 18x20-20
Iron & Bronze 5 & 6
16.529 16.542 .013 16.529 16.542 .013
.87 8°
16.527 16.544 .017 16.527 16.544 .017
Steel 5 & 6
16.529 17.373 .023 16.529 17.373 .023
.87 8°
16.527 17.376 .027 16.527 17.376 .027
M
16x18-30
Iron & Bronze 5
17.355 17.383 .018 17.355 17.383 .018
.38 8°
17.352 17.386 .024 17.352 17.386 .024
Steel 5
17.355 17 .373.028 17.355 17.373 .028
.38 8°
17.352 17.376 .034 17.352 17.376 .034
16x18-30H
Iron & Bronze 7
17.355 17.383 .018 17.355 17.383 .018
.62 8°
17.352 17.386 .024 17.352 17.386 .024
Steel 7
17.355 17.373 .028 17.355 17.373 .028
..62 8°
17.352 17.376 .034 17.352 17.376 .034
16x18-30G
Iron & Bronze 7
17.355 17.383 .018 17.355 17.383 .018
.62 8°
17.352 17.886 .024 17.352 17.886 .024
Steel 7
17.355 17.383 .028 17.355 17.383 .028
.62 8°
17.352 17.386 .034 17.352 17.386 .034
18x20-30
Iron & Bronze 5
19.528 19.548 .020 18.595 18.615 .020
.38 8°
19.525 19.551 .026 18.592 18.618 .026
Steel 5
19.528 19.558 .030 18.595 18.625 .030
.38 8°
19.525 19.561 .036 18.592 18.628 .036
20x24-24
Iron & Bronze 5 & 6
18.345 18.365 .020 18.345 18.365 .020
.38 8°
18.342 18.368 .026 18.342 18.368 .026
Steel 5 & 6
18.345 18.375 .030 18.345 18.375 .030
.38 8°
18.342 18.378 .036 18.342 18.378 .036
20x24-30
Iron & Bronze
5
HIGH
RPM
19.528 19.548 .020 18.595 18.615 .020
.38 8°
19.525 19.551 .026 18.592 18.618 .026
Steel
5
HIGH
RPM
19.528 19.548 .030 18.595 18.625 .030
.38 8°
19.525 19.551 .036 18.592 18.628 .036
20x24-30
Iron & Bronze
5
LOW
RPM
21.903 19.558 .022 20.968 20.990 .022
.38 8°
21.900 19.561 .028 20.965 20.993 .028
Steel
5
LOW
RPM
21.903 21.928 .032 20.968 21.000 .032
.38 8°
21.900 21.928 .038 20.965 21.003 .038