KSB CTN - Page 16

4 Description of the Pump (Set)
16 of 76
CTN / CTN-H
Pump casing
▪ Volute casing (with casing wear ring, if applicable) and casing cover
Impeller type
▪ Closed radial impeller with multiply curved vanes
▪ Sealing clearance on both sides and balancing holes balance axial thrust
Shaft seal
▪ Gland packing
▪ Commercial single and double mechanical seals
▪ Commercial cartridge seals
Gland packing Table6: Seal chamber with different shaft seals (examples)
Basic design Cooled
Mechanical seal
Single Double
Bearings
Design specifications ▪ Paired angular contact ball bearings for axial fixing of the shaft assembly
▪ Product-lubricated carbon plain bearing
▪ Grease lubrication
▪ Optional: oil lubrication
Bearings used Table7: Thrust bearing design
KSB designation FAG designation SKF designation
B.G B.TVP.UA BECBP
Table8: Standard bearings: grease-lubricated thrust bearings (rolling element
bearing)
Sizes Bearing size
25/40/50 2 x 7206 B.G
80/100 2 x 7309 B.G
125/150 2 x 7309 B.G
200/250 2 x 7313 B.G
Table9: Optional: oil-lubricated thrust bearings (rolling element bearing)
Sizes Bearing size
25/40/50 1 x 6312 DIN 625
80/100 2 x 7312 BUA DIN 628
125/150 2 x 7315 BUA DIN 628
200/250 2 x 7318 BUA DIN 628