SS pump h SS wear ring + SS impeller
Wear ring inside
Impeller outside
Nominal
diameter
Max.
tolerance
Min.
tolerance
Nominal
diameter
Max.
tolerance
Min.
tolerance
76.5
0.074
0
76
-0.2
-0.274
76.5
0.074
0
76
-0.2
-0.274
76.5
0.074
0
76
-0.2
-0.274
63.5
0.74
0
63
-0.19
-0.264
90.55
0.087
0
90
-0.22
-0.307
90.55
0.087
0
90
-0.22
-0.307
100.55
0.087
0
100
-0.22
-0.307
100.55
0.087
0
100
-0.22
-0.307
100.55
0.087
0
100
-0.22
-0.307
112.55
0.087
0
112
-0.24
-0.327
112.55
0.087
0
112
-0.24
-0.327
112.55
0.087
0
112
-0.24
-0.327
122.6
0.1
0
122
-0.26
-0.36
130.6
0.1
0
130
-0.26
-0.36
130.6
0.1
0
130
-0.26
-0.36
154.6
0.1
0
154
-0.28
-0.38
154.6
0.1
0
154
-0.28
-0.38
185.65
0.115
0
185
-0.34
-0.455
185.65
0.115
0
185
-0.34
-0.455
185.65
0.115
0
185
-0.34
-0.455
200.65
0.115
0
200
-0.34
-0.455
144.6
0.1
0
144
-0.28
-0.38
224.65
0.115
0
224
-0.38
-0.495
174.6
0.1
0
174
-0.31
-0.41
224.65
0.115
0
224
-0.38
-0.495
210.65
0.115
0
210
-0.38
-0.495
Related information
4.2 Checking gap between impeller and pump housing/cover
(wear rings)
6.4 Related documents
You find further product information about NBS/NBSE in the
following documents. All documents are available in Grundfos
Product Center: www.grundfos.com > International website >
Grundfos Product Center.
Title
Publication number
NBS/NBSE installation and op-
erating instructions
99932034
NBS/NBSE service kit catalogue -
6.5 Service videos
You can find video instructions for the service of NBS/NBSE pumps
by exploring the following QR codes/links:
Video
QR code
How to dismantle and assemble Grundfos NBS
single-stage pump
How to replace low pressure shaft seal on Grund-
fos NBS single-stage pump
How to replace high pressure shaft seal on
Grundfos NBS single-stage pump
28
English (GB)
