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)
Содержание NB 80-200/222VAXEF1BESBQQEWX2
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