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Commercial Water
Goulds Water Technology
NPO PRODUCT LINE NUMBERING SYSTEM
The various versions of the NPO are identified by a product code number on the pump label. This number is also
the catalog number for the pump. The meaning of each digit in the product code number is shown below.
EXAMPLE PRODUCT CODE
1 SN 2 C 1 A 4 F
Seal Vent/Flush Option
Mechanical Seal and O-ring
4 = Pre-engineered standard
For optional mechanical seal modify catalog order no. with seal code
listed below.
Impeller Option . . . No Adder Required
For optional impeller diameters modify catalog order no. with impel-
ler code listed. Select optional impeller diameter from pump perfor-
mance curve.
Driver
1 = 1 PH, ODP
4 = 1 PH, TEFC
7 = 3 PH, XP
2 = 3 PH, ODP
5 = 3 PH, TEFC
8 = 575 V, XP
3 = 575 V, ODP 6 = 575 V, TEFC 0 = 1 PH, XP
HP Rating
C = ½ HP
E = 1 HP
G = 2 HP
J = 5 HP
D = ¾ HP
F = 1½ HP H = 3 HP
K = 7½ HP
Driver: Hertz/Pole/RPM
1 = 60 Hz, 2 pole, 3500 RPM
2 = 60 Hz, 4 pole, 1750 RPM
4 = 50 Hz, 2 pole, 2900 RPM
5 = 50 Hz, 4 pole, 1450 RPM
Material
SN = Stainless steel
Pump Size
1 = 1 x 1¼ – 6
2 = 1¼ x 1½ – 6
3 = 1½ x 2 – 6
Impeller
Pump Size
Code
1 x 1¼ – 6
1¼ x 1½ – 6
1½ x 2 – 6
Diameter Diameter Diameter
A
4
5
⁄
16
5
5
⁄
16
5
7
⁄
16
B
4
5
1
⁄
16
5¼
C
3¾
4
5
⁄
8
4
15
⁄
16
D
3½
4
5
⁄
16
4
5
⁄
8
E
3¼
4
1
⁄
16
4
7
⁄
16
F
3
3¾
4
3
⁄
16
G
5
3
⁄
8
3
7
⁄
16
3¾
H
5
—
—
For frame
mounted
version,
substitute the
letters “FRM” in
these positions.
John Crane Type 21 Mechanical Seal (
5
⁄
8
” seal)
Seal Rotary Stationary Elastomers Metal Part Casing
Code
Parts No. O-Ring
2
Carbon
EPR
10K18 EPR
4
Sil-
Viton
316 SS
10K55 Viton
5
Sil-
Carbide
EPR
10K81 EPR
6 Carbide
Viton
10K62 Viton
