TP50-160/2 Shaft Seals Manual

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Contents
Type designation
Type designation to EN 12756 3
Grundfos type designation 5
Shaft seals in general
What is a shaft seal 7
How are shaft seals used 7
Rotating shaft seals 7
Shaft seal components 8
Balanced shaft seal 8
Unbalanced shaft seal 8
Seal balancing 9
How does a shaft seal work 11
Friction, wear and leakage 12
O-ring shaft seals 13
Cartridge shaft seals 14
Shaft seals in viscous liquids
Shaft seals in viscous liquids 15
Recommended shaft seals for viscous liquids 15
Seal face materials
Seal face material combinations 16
Tungsten carbide/tungsten carbide 16
Silicon carbide/silicon carbide 16
Carbon/tungsten carbide or carbon/silicon carbide 17
Carbon/ceramic (aluminium oxide) 17
Tungsten carbide/hybrid 17
Silicon carbide 18
Materials of secondary seals
Secondary seals 22
NBR 22
EPDM 22
FKM 22
FFKM 22
FXM 23
List of pumped liquids 23
Types of shaft seals
Types of shaft seals 24
Grundfos type A 24
Grundfos type B 25
Grundfos type C 27
Grundfos type D 28
Grundfos type E 29
Grundfos type G 31
Grundfos type H 33
Grundfos type K 36
Grundfos type R 38
Seal arrangements 39
Double seal (back-to-back) 39
Double seal (tandem) 39
Cartex-DE shaft seals 40
Air-cooled top (for high temperatures) 41
Comparing seal types 43
Selection of shaft seals
Selection of the most suitable shaft seal 44
Pumped liquids
Lists of pumped liquids 45
Acids 46
Alkalis 48
Salts 49
Water 51
Coolants 52
Fuels 53
Synthetic and mineral oils 54
Vegetable oils 55
Solvents 56
Oxidants 57
Organic compounds 58
Miscellaneous 59
Failure analysis
Shaft seal failure analysis guide 60
Seal failure analysis
Key to failure analysis 61
Further product documentation
WebCAPS 62
WinCAPS 63