Letter codes for shaft seals
Pos. 15 in NB, NBG type key example.
Code
examp
le
Description
Code explanation
B
Shaft seal type
A: O-ring seal with fixed
driver
B: Rubber bellows seal
D: O-ring seal, balanced
H: Cartridge seal,
balanced
Q
Material of
rotating seal
face
A: Carbon, metal-
impregnated with
antimony which is not
approved for potable
water
B: Carbon, resin-
impregnated
Q: Silicon carbide
Q
Material of
stationary seal
A: Carbon, metal-
impregnated with
antimony which is not
approved for potable
water
Q: Silicon carbide
E
Material of
secondary seal
and other
rubber and
composite parts,
except the wear
ring
E: EPDM
V: FKM (Viton
®
)
F: FXM (Fluoraz
®
)
K: FFKM (Kalrez
®
)
X: HNBR
U: Dynamic O-rings in
FFKM and static O-rings
in PTFE
For a thorough description of shaft seal types and
materials, see the data booklet "NB, NBG, NK, NKG,
NBE, NBGE, NKE, NKGE - Custom-built pumps
according to EN 733 and ISO 2858".
Codes for rated motor power
Pos. 16 in NB, NBG type key example.
Code
Description
[hp]
[kW]
A
0.16
0.12
B
0.25
0.18
C
0.33
0.25
D
0.5
0.37
E
0.75
0.55
F
1
0.75
G
1.5
1.1
H
2
1.5
I
3
2.2
J
4
3
K
5 (5.5
1
)
3.7 (4
1
)
L
7.5
5.5
M
10
7.5
N
15
11
O
20
15
P
25
18.5
Q
30
22
R
40
30
S
50
37
T
60
45
U
75
55
V
100
75
W
125
90
X
Bare shaft
pump
Y
> 200
2
> 150
2
1
150
110
2
175
132
3
200
150
4
215
3
160
3
5
250
3
185
3
1
Value in bracket is for the standard IEC motor size.
Value outside bracket is for the motor size according
to NEMA standards.
12
English (GB)
Summary of Contents for NB 80-200/222VAXEF1BESBQQEWX2
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