Allweiler NT Series - Fig. 19 U3

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Appendix

Sizes at bearing bracket 2/360

Fig. 19 U3…D – Unbalanced mechanical seal

A Version 2/360-250

161-295/E BA-2021.04 en-US NT series 35

Main Page

Table of Contents2
About this Document5
Target Groups5
Other Applicable Documents5
Target Groups and Their Duties5
Other Applicable Documents and Their Purpose5
Warnings and Symbols6
Technical Terms6
Warnings and Consequences of Disregarding Them6
Symbols and Their Meaning6
Technical Terms and Their Meaning6
Safety7
Intended Use7
General Safety Instructions7
Product Safety7
Operator's Obligations8
Obligations of Personnel8
Specific Hazards8
Explosion-Hazard Area8
Electric Shock9
Hazardous and Spraying (Pumped) Liquids9
Moving Parts9
Hot Surfaces9
Layout and Function10
Labels10
Type Plate10
Digital Nameplate10
Fig. 1 Type Plate (Example)10
(Example)10
Transmitter (Example)10
Pump Type Code11
Fig. 4 Pump Type Code (Example)11
Layout12
Shaft Seals12
Mechanical Seals12
Stuffing Box12
Fig. 5 NT Layout12
Auxiliary Systems13
Sealing Systems13
(Sketch)13
Tics13
Transport, Storage and Disposal14
Transport14
Unpacking and Inspection on Delivery14
Lifting14
Fig. 7 Fastening Lifting Gear to Pump Unit14
Fig. 8 Fastening the Lifting Gear to the Pump14
Fig. 9 Setting down the Pump Without an Installed Support Foot14
Fig. 14 Checking the Alignment of the Tab14
Treatment for Storage15
Storage15
Removing Preservative15
Disposal15
Setup and Connection16
Preparing the Setup16
Checking the Ambient Conditions16
Preparing the Installation Site16
Preparing the Foundation and Surface16
Removing Preservative16
Installing the Heat Insulation (Optional)16
Installation on a Foundation17
Placing the Pump Unit on the Foundation17
Fastening the Pump Unit17
Fig. 10 Installation with Foundation17
Fig. 11 Checking for Distortion17
Installation Without a Foundation18
Installing the Motor18
Planning the Pipes18
Specifying Supports and Flange Connections18
Specifying Nominal Diameters18
Fig. 12 Installation Without a Foundation18
Specifying Pipe Lengths19
Optimizing Changes in Cross-Section and Direction19
Discharging Leaks19
Providing Safety and Control Devices (Recommended)19
Connecting the Pipes19
Keeping the Piping Clean19
Installing Auxiliary Pipes (if Available)19
Installing the Suction Pipe19
Fig. 13 Straight Pipe Lengths Upstream19
Installing the Pressure Pipe20
Inspection for Stress-Free Pipe Connections20
Checking the Support Foot for Distortion (if Available)20
Electrical Connection20
Connecting the Motor20
Checking the Sense of Rotation20
Aligning the Coupling Precisely21
Coupling21
Fig. 15 Checking for Lateral and Vertical21
Fig. 16 Checking for Angular Displacement21
Aligning the Motor22
Aligning the Motor with Sets of Shims22
Aligning the Motor with Adjusting Screws22
5.10 Installing the Coupling Guard22
Screws22
Operation23
Preparations for the Initial Start-Up23
Identifying the Pump Type23
Removing Preservative23
Lubricating the Bearings23
Preparing Auxiliary Systems (if Available)23
Filling and Bleeding23
Start-Up24
Switching on24
Switching off24
Shutting down the Pump24
Measures to be Taken if the Pump Is Shut down24
Measures Depending on the Behavior of the Pumped Liquid24
Start-Up Following a Shutdown Period25
Operating the Stand-By Pump25
Measures to be Taken after Prolonged Shutdown Periods25
Maintenance26
Inspections26
Antifriction Bearings Lubricated with26
Grease26
Mechanical Seals26
Stuffing Box26
Cleaning the Pump26
Dismounting27
Returning the Pump to the Manufacturer27
Preparations for Dismounting27
Measures for Return27
Installing28
Ordering Spare Parts28
Troubleshooting29
Malfunction/Number Assignment29
Troubleshooting List31
Appendix32
Sectional Drawing32
Auxiliary Connections32
Part Numbers and Designations32
Tab32
Connection Designation Abbreviations32
Designation of Components According to Part Numbers33
Sectional Drawings34
Fig. 18 U34
Fig. 19 U335
Fig. 20 U336
Fig. 21 U337
Fig. 22 U338
Fig. 23 U339
Fig. 24 U340
Versions and Details at Bearing Bracket40
Seals41
Coupling Guard41
Flushing41
Fig. 26 U341
Seal41
Fig. 28 U1B - Stuffing Box with Self-Locking41
Fig. 29 Coupling Guard on Base Plate Versions41
Technical Specifications42
Ambient Conditions42
Parameters for Auxiliary Systems42
Sound Pressure Level42
Tab. 1942
Open Flow System42
Tightening Torques43
Cleaning Agents43
Lubricants43
Tab43
Grease Types43
Minimum Amounts for Grease Lubrication43
Bearing Bracket Size44
Height Offset for Motor Alignment with45
Adjusting Screw45
Tab45
Height Setting at the Adjusting Screw45
Flange Loads According to ISO 519946
Fig. 30 Empirical Formulas for Forces and46
Fig. 31 Flange Loads at the Pump46
Temperature47
Flange Loads47
Spare Parts for Two Years of Continuous Operation According to DIN 2429648
Tab48
Spare Parts for Two Years of Continuous Operation48
Declaration of Harmlessness49
Declaration of Conformity According to EC Machine Directive50

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Allweiler NT Series - Fig. 19 U3

Table of Contents

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