ARI Armaturen STEVI 471 EN User Manual
Operating and installation instructions, Straight through control valves - stevi
Rev. 0040305000 0410 englisch
1.0 General information on operating
instructions ..................................................... 2
2.0 Notes on possible dangers............................ 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 ........................................................5
5.0 Installation....................................................... 6
5.1 General notes on installation...................................6
5.2 Requirements at the place of installation ................7
5.3 Installation instructions concerning actuators .........7
6.0 Putting the valve into operation.................... 8
7.0 Care and maintenance................................... 8
7.1 Replacement of stem sealings ............................... 8
7.1.1 PTFE V-ring unit design .................................... 8
7.1.2 Stuffing box packing design ............................... 9
7.1.3 Bellows seal design ........................................ 10
7.2 Replacement of internal parts .............................. 12
7.2.1 Replacement of plug and stem ...................... 12
7.2.2 Replacement of seals of
pressure balanced plugs ............................... 12
7.2.3 Replacement of the seat ring........................... 13
7.3 Tightening torques................................................ 13
8.0 Troubleshooting ........................................... 13
9.0 Troubleshooting table ................................ 14
10.0 Dismantling the valve or the top part ...... 15
11.0 Warranty / Guarantee ................................. 15
12.0 EC declaration of conformity .................... 16
Contents
Operating and installation instructions
Straight through control valves - STEVI
®
470 / 471
Series 470
Series 471
Document Outline
- Contents
- 1.0 General information on operating instructions
- 2.0 Notes on possible dangers
- 3.0 Storage and transport
- 4.0 Description
- 5.0 Installation
- 6.0 Putting the valve into operation
- 7.0 Care and maintenance
- 8.0 Troubleshooting
- 9.0 Troubleshooting table
- 10.0 Dismantling the valve or the top part
- 11.0 Warranty / Guarantee
- 12.0 EC declaration of conformity