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Operating and installation instructions
Straight through control valves - STEVI
instructions ..................................................... 2
2.0 Notes on possible dangers............................ 2
2.1 Significance of symbols ..........................................2
2.2 Explanatory notes on safety information .................2
3.0 Storage and transport ................................... 2
4.0 Description...................................................... 3
4.1 Scope of applications ..............................................3
4.2 Operating principles ................................................3
4.3 Diagram ..................................................................4
4.3.1 Plug design ........................................................4
4.4 Technical data .........................................................5
4.5 Marking ...................................................................5
5.0 Installation....................................................... 5
5.1 General notes on installation...................................5
5.2 Requirements at the place of installation ................6
6.0 Putting the valve into operation.................... 7
Series 422
Contents
Rev. 0040307000 0410 englisch
Series 462
7.0 Care and maintenance................................... 8
7.1 Replacement of stem sealings ............................... 8
7.1.1 Stuffing box packing design ............................... 8
7.1.2 Bellows seal design ........................................... 9
7.2 Replacement of internal parts ............................. 10
7.2.1 Replacement of plug and stem ....................... 10
pressure balanced plugs ................................ 10
7.2.3 Replacement of the seat ring............................11
7.3 Tightening torques.................................................11
7.3.1 Tightening torques for nuts ..............................11
7.3.2 Tightening torques for seat rings .....................11
8.0 Troubleshooting ............................................11
9.0 Troubleshooting table ................................ 12
11.0 Warranty / Guarantee ................................. 13
12.0 EC declaration of conformity .................... 14
®
422 / 462
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Table of Contents
Troubleshooting
Related Manuals for ARI Stevi 462 Series
Summarization of Contents
2.0 Notes on possible dangers
2.1 Significance of symbols
Explains the meaning of warning symbols used in the document.
2.2 Explanatory notes on safety information
Details the importance of safety information and symbols for injury prevention.
4.0 Description
4.1 Scope of applications
Outlines the intended uses and industries for the control valves.
4.2 Operating principles
Explains how the control valves function and the available plug types.
4.3 Diagram
4.3.1 Plug design
Illustrates the design of different plug types for control valves.
5.0 Installation
5.1 General notes on installation
Provides essential precautions and guidelines for proper valve installation.
7.0 Care and maintenance
7.1.1 Stuffing box packing design
Explains the stuffing box packing design and its maintenance.
7.2 Replacement of internal parts
7.2.1 Replacement of plug and stem
Instructions for replacing the plug and stem assembly.
7.2.2 Replacement of seals of pressure balanced plugs
Procedures for replacing seals on pressure-balanced plugs.
7.3 Tightening torques
7.3.1 Tightening torques for nuts
Lists torque specifications for various nut sizes.
7.3.2 Tightening torques for seat rings
Specifies torque values for seat rings based on nominal diameter.
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