KRAL C Series - Default Chapter; Table of Contents

Table of contents
1 About this document ..................................................... 4
1.1 General information .......................................................4
1.2 Associated documents ..................................................4
1.3 Target groups ................................................................4
1.4 Symbols.........................................................................4
1.4.1 Danger levels ....................................................4
1.4.2 Danger signs.....................................................5
1.4.3 Symbols in this document .................................5
2 Safety .............................................................................. 5
2.1 Proper use .....................................................................5
2.2 Foreseeable misuse ......................................................5
2.3 Obligations of the operator-owner .................................6
2.4 Safety instructions .........................................................6
2.4.1 Fundamental safety instructions .......................6
3 Identification................................................................... 6
3.1 Type code......................................................................6
3.2 Rating plate ...................................................................8
4 Technical data ................................................................ 8
4.1 Operating limits..............................................................8
4.2 Required NPSH values..................................................9
4.3 Sound pressure level.....................................................9
4.4 Weights..........................................................................9
5 Function description.................................................... 10
5.1 Cartridge pump structure.............................................10
5.2 Pump unit structure .....................................................12
5.3 Functional principle......................................................12
5.4 Housing variants..........................................................12
5.5 Shaft seal.....................................................................13
5.5.1 Seal variants inner bearing .............................13
5.5.2 Seal variants outer bearing .............................14
5.6 Overflow valve (optional) .............................................14
5.7 Heating system (optional)............................................14
6 Transportation, storage............................................... 15
6.1 Dangers during transportation .....................................15
6.2 Dangers during storage ...............................................15
6.3 Unpacking and checking the state of delivery .............15
6.4 Transporting the pump/pump unit................................15
6.5 Storing the pump .........................................................16
7 Preservation ................................................................. 16
7.1 Preservation table........................................................16
7.2 Preserving the inner surfaces......................................17
7.3 Preserving the outer surfaces......................................17
7.4 Removing the preservation..........................................17
8 Installation, removal .................................................... 18
8.1 Dangers during installation ..........................................18
8.2 Dangers during removal ..............................................18
8.3 Installing the pump ......................................................18
8.4 Removing the pump ....................................................19
9 Connection ................................................................... 20
9.1 Dangers during connection work .................................20
9.2 Connecting the pump to the pipe system ....................20
9.3 Insulating the pump .....................................................21
9.4 Assembling the pump and motor.................................21
9.5 Connecting the pump unit to the power supply............22
10 Operation........................................................................22
10.1 Dangers during operation ............................................22
10.2 Commissioning ............................................................22
10.2.1 Cleaning the pipe system ................................22
10.2.2 Filling and venting the pump............................23
10.2.3 Checking the direction of rotation ....................24
10.2.4 Commissioning the pump ................................25
10.3 During operation ..........................................................26
10.3.1 Checking the operating pressure.....................26
10.3.2 Monitoring filters and/or strainers ....................26
10.3.3 Setting the overflow valve (optional)................26
10.3.4 Switching off the pump unit .............................26
10.4 Decommissioning.........................................................27
10.4.1 Decommissioning the pump ............................27
10.5 Recommissioning.........................................................28
10.5.1 Recommissioning the pump ............................28
11 Maintenance...................................................................28
11.1 Dangers during maintenance.......................................28
11.2 Required maintenance.................................................28
11.3 Ball bearing (inner bearing)..........................................28
11.4 Ball bearing (outer bearing) .........................................29
11.5 Maintaining the pump...................................................29
11.6 Cleaning the leakage vent hole....................................29
12 Servicing ........................................................................30
12.1 Dangers during servicing .............................................30
12.2 Wear ............................................................................30
12.2.1 Signs of wear...................................................30
12.2.2 Shaft seal.........................................................30
12.3 Replacing the coupling.................................................30
12.3.1 Removing the coupling ....................................30
12.3.2 Installing the coupling ......................................31
12.4 Replacing the mechanical seal (inner bearing)............32
12.4.1 Removing the mechanical seal........................32
12.4.2 Installing the mechanical seal..........................34
12.5 Replacing the radial shaft seal (inner bearing) ............36
12.5.1 Removing the radial shaft seal ........................36
12.5.2 Installing the radial shaft seal ..........................37
12.6 Replacing the ball bearing and screw set (inner bearing)
.....................................................................................38
12.6.1 Removing the ball bearing and screw set........38
12.6.2 Installing the ball bearing and screw set..........39
12.7 Replacing the mechanical seal and ball bearing (outer
bearing)........................................................................41
12.7.1 Removing the mechanical seal and ball bearing
.........................................................................41
12.7.2 Installing the mechanical seal and ball bearing
.........................................................................43
12.8 Replacing the screw set (outer bearing) ......................44
12.8.1 Removing the screw set ..................................44
12.8.2 Installing the screw set ....................................45
12.9 Replacing the cartridge pump ......................................47
12.9.1 Removing the cartridge pump .........................47
12.9.2 Installing the cartridge pump ...........................47
13 Disposal..........................................................................48
13.1 Dismantling and disposing of the pump ......................48
14 Troubleshooting ............................................................49
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OIC 18en-GB Edition 2020-01
Operating instructions