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KRAL
Water Pump
DL3 Series
KRAL DL3 Series User Manual
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Operating instructions
KRAL pump stations.
Series DL3 / DL4 / DS1 / DS3 / DS4
Mechanical seal/Radial shaft seal
OID 06en-GB
Edition 2019-11
Original instructions
www.kral.at
2
Table of Contents
Table of Contents
2
About this Document
4
General Information
4
Associated Documents
4
Target Groups
4
Symbols
4
Danger Levels
4
Danger Signs
4
Symbols in this Document
5
Symbols for Personal Protective Equipment
5
Safety
6
Proper Use
6
Foreseeable Misuse
6
Obligations of the Operator-Owner
6
Safety Instructions
6
Fundamental Safety Instructions
6
Identification
7
Type Code
7
Rating Plate
7
Technical Data
8
Operating Limits
8
Filling Volume
8
Inlet Pressure for Heavy Fuel Oil
8
Sound Pressure Level
8
Mesh Width Strainer/Filter
9
Weights
9
Function Description
10
Structure
10
Functional Principle
10
Assignment Pump Station - Pump
11
Reversing Valve
11
Overflow Valve
11
Pressure Measurement
12
Strainer
12
Transportation, Storage
12
Dangers During Transportation
12
Dangers During Storage
13
Unpacking and Checking the State of Delivery
13
Transporting the Pump Station
13
Storing the Pump Station
14
Preservation
14
Preservation Table
14
Preserving the Inner Surfaces
14
Preserving the Outer Surfaces
15
Removing the Preservation
15
Installation, Removal
16
Dangers During Installation
16
Dangers During Removal
16
Mounting the Pump Station
16
Removing the Pump Station
17
Connection
18
Dangers During Connection Work
18
Connecting the Pump Station to the Pipe System
18
Connecting the Pump Station to the Power Supply
19
Operation
20
Dangers During Operation
20
Commissioning
20
Cleaning the Pipe System
20
Filling and Venting the Pump Station
20
Checking the Direction of Rotation
21
Commissioning the Pump Station
22
During Operation
22
Checking the Operating Pressure
22
Activating the Reversing Valve
23
Adjusting the Overflow Valve
23
Switching off the Pump Station
24
Decommissioning
24
Taking the Pump Station out of Operation
24
Recommissioning
25
Recommissioning the Pump Station
25
Maintenance
25
Dangers During Maintenance
25
Required Maintenance
26
Ball Bearing (Outer Bearing)
26
Ball Bearing (Inner Bearing)
26
Maintaining the Pump Station
26
Maintaining the Strainers
26
Servicing
27
Dangers During Servicing
27
Wear
27
Signs of Wear
27
Mechanical Seal
27
Radial Shaft Seal
27
Cleaning the Strainer
28
Replacing the Coupling
29
Removing the Coupling (Inner Bearing)
29
Installing the Coupling (Inner Bearing)
30
Removing the Coupling (Outer Bearing)
31
Installing the Coupling (Outer Bearing)
32
Replacing the Pump
33
Replacing the Mechanical Seal
34
Removing the Mechanical Seal (DL2 from 320/DS1)
34
Installing the Mechanical Seal (DL2 from 320/DS1)
34
Removing the Mechanical Seal (DL3/DL4/DS3/DS4)
35
Installing the Mechanical Seal (DL3/DL4/DS3/DS4)
35
Replacing the Radial Shaft Seal
36
Removing the Radial Shaft Seal (DL2 as of 320/DS1)
36
Installing the Radial Shaft Seal (DL2 as of 320/DS1)
36
Removing the Radial Shaft Seal (DL3/DL4/DS3/DS4)
37
Installing the Radial Shaft Seal (DL3/DL4/DS3/DS4)
37
Replacing the Mechanical Seal and Ball Bearing (Outer Bearing)
38
Replacing Seals
39
Replacing Seals (DL3/DL4/DS3/DS4)
39
Replacing Seals (DS1)
39
Disposal
43
Dismantling and Disposing of the Pump Station
43
Troubleshooting
43
Possible Faults
43
Troubleshooting
44
Accessories
46
Pump Station Accessories
46
Heating
46
Possible Types of Heating
46
Electrical Heating System/Fluid Heating System
47
Operating Data
47
Heating-Up Period
47
Storing Heating Elements
48
Commissioning the Electrical Heating System
48
Commissioning the Fluid Heating System
48
Spare Parts
49
Overview
49
Maintenance Kits
50
Maintenance Kit Sealing Kit Pump Station (DL3/DL4/DS3/DS4)
50
Maintenance Kit Sealing Kit Pump Station (DS1)
51
Maintenance Kit Sealing Kit Mechanical Seal (DL3/DL4/DS3/DS4)
52
Maintenance Kit Sealing Kit Mechanical Seal (DL2 as of 320/DS1)
52
Maintenance Kit Sealing Kit Radial Shaft Seal (DL3/DL4/DS3/DS4)
53
Maintenance Kit Sealing Kit Radial Shaft Seal (DL2 as of 320/DS1)
53
Repair Kits
54
Repair Kit, Overflow Valve
54
Repair Kit Non-Return Valve
55
Other Spare Parts
56
Outer Bearing Overview (DS3/DS4)
56
Appendix
57
Tightening Torques for Screws with Metric Screw Threads with and Without Wedge Lock Washers
57
Tightening Torques for Screw Plugs with Thread Measured in Inches and Elastomer Seal
57
Contents of the Declaration of Conformity
58
4
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KRAL DL3 Series Specifications
General
Type
Centrifugal Pump
Series
DL3
Max Head
Up to 100 m
Connection Type
Flanged
Seal Type
Mechanical Seal
Material
Cast iron, stainless steel
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