ARI Armaturen STEVI 451 EN - Manual

Rev. 0040306000 0410 englisch
1.0 General information on operating
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 Mixing plug design .............................................4
4.3.2 Diverting plug design ..........................................5
4.4 Technical data .........................................................6
4.5 Marking ...................................................................6
5.0 Installation....................................................... 7
5.1 General notes on installation...................................7
5.2 Requirements at the place of installation ................8
5.3 Installation instructions concerning actuators .........8
6.0 Putting the valve into operation.................... 9
7.0 Care and maintenance................................... 9
7.1 Replacement of stem sealings ............................... 9
7.1.1 PTFE V-ring unit design .................................... 9
7.1.2 Stuffing box packing design ............................. 10
7.1.3 Bellows seal design ..........................................11
7.1.3.1 Bellows seal and mixing plug ......................11
7.1.3.2 Bellows seal and diverting plug................... 13
7.2 Replacement of internal parts ............................ 15
7.2.1 Mixing plug design .......................................... 15
7.2.2 Diverting plug design ...................................... 17
7.3 Tightening torques................................................ 19
7.3.1 Tightening torques for hexagon nuts (bonnet) 19
7.3.2 Tightening torques for hexagon nuts (plug) .... 19
7.3.3 Tightening torques for seat rings ..................... 19
8.0 Troubleshooting ........................................... 19
9.0 Troubleshooting table ................................. 20
10.0 Dismantling the valve or the top part ...... 21
11.0 Warranty / Guarantee ................................. 21
12.0 EC declaration of conformity .................... 22
Operating and installation instructions
3-way control valves - STEVI
®
450 / 451
Contents
Series 450 Series 451