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After setting the last packing ring, secure the
packing with the gland and tighten the nut by
hand.
After tightening, the shaft should turn by hand as
easily as before the setting of the packing.
Pump
Stuffing box size
NPG 150-200
NPG 150-500
NPG 200-250
NPG 200-315
NPG 200-355
NPG 200-400
NPG 200-500
NPG 250-250
NPG 250-315
NPG 250-355
NPG 250-400
NPG 250-500
NPG 300-300
NPG 300-400
NPG 300-450
NPG 300-500
NPG 350-350
NPG 400-500
NPG 400-650
NPG 500-500
6.3 Spare parts
6.3.1 Ordering of spares
When ordering spares the following information
should be quoted:
1 Pump serial number.
2 Pump size.
3 Part name
4 Part number
5 Number of parts required.
The pump size and serial number are shown on the
pump nameplate.
To ensure continued satisfactory operation,
replacement parts to the original design specifica-
Installation and maintenance instructions Wilo-Horizontal pumps
Dimensions in millimeters
D1
D2
44/64
38
44
55/90
55
65
44/64
38
44
56/76
50
56
56/76
50
56
49/85
49
60
55/90
55
65
56/76
50
56
56/76
50
56
49/85
49
60
55/90
55
55/90
55
65
56/76
40
56
55/90
55
55/90
55
65
74/120
74
90
55/90
55
65
74/120
74
90
74/120
74
90
80/132
80
100
D3
D4
D5
64
86
M12
90
120
M16
64
86
M12
76
86
M12
76
86
M12
85
110
M14
90
120
M16
76
86
M12
76
86
M12
85
110
M14
65
90
120
90
120
M16
76
86
M12
65
90
120
90
120
M16
120
150
M16
90
120
M16
120
150
M16
120
150
M16
132
180
M16
tion should be of our supply. Any change to the
original design specification (modification or use
of a non-standard part) will invalidate the pump's
safety certification.
6.3.2 Storage of spares
Spares should be stored in a clean dry area away
from vibration. Inspection and re-treatment of
metallic surfaces (if necessary) with preservative
is recommended at 6 monthly intervals.
6.4 Recommended spares and consumable items
[1500], [2250], [3011], [3012], [4130], [4610]
NPG
Gland packing
L1
Qty
45
4
65
5
45
4
45
4
45
4
65
5
65
5
45
4
45
4
65
5
M16
65
5
65
5
45
4
M16
65
5
65
5
64
4
65
5
64
4
64
4
72
4
English
■
mm
10
12
10
10
10
12
12
10
10
12
12
12
10
12
12
14
12
14
14
16
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