20
5.4 Recommended stocks of spare parts
Seal set
We recommend that you keep both seal kits and service kits for the
W+ pumps in stock. The seal kit for the W+ pump consists of the
wearing parts of the pump, as specified on page 53.
Service kit
The service kit is made up of a number of the main components of the
pump which are not wearing parts, but which you still may have to
replace: shaft, impeller, cap nut and fixing kit.
The table below shows the recommended stocks of spare parts for
normal operation and in cases where there are special needs - for
example 24-hour operation, operation with abrasive media, or proces-
ses that are sensitive to even the shortest production stoppage.
Wearing parts (seal kit, see page 53)
Service parts (shaft, impeller, cap nut page 49, fixing kit page 52)
6.1 Sound pressure and sound effect level for W+ Pumps
Measurements have been carried out in accordance with ISO 3743,
Grade 2, and ISO 3746, Grade 3. Tolerance: +3 dB.
"LpA in dB" refers to the sound pressure level at a distance of one
metre from the surface of the pump at a height of 1.6 m above floor
level (cf. EC Directive (89/392/EEC) 1.7.4.).
Operating conditions A, B and C are defined as follows:
A. Nominal flow and operating pressure
B. Nominal flow and 60% operating pressure
C. 60% flow and operating pressure
The nominal flow and max. operating pressure in the case of the
W+ 55/60, for example, are 60m³/hr at an operating pressure of
55WG, and so on.
5 Maintenance
Normal operation
Special needs
0-5 5-20 > 20
No. of pumps in service
2 3 1
3 6 2
Sets Sets Sets/ 10 pumps
Normal operation
Special needs
0-5 5-20 > 20
No. of pumps in service
0 1 1
1 2 1
Sets Sets Sets/ 10 pumps
6 Technical data
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