ARI Armaturen STEVI 423 DN300 EN - Manual

Rev. 0040318001 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
4.4 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
5.3 Installation instructions concerning actuators .........6
6.0 Putting the valve into operation.................... 7
7.0 Care and maintenance ................................... 7
7.1 Replacement of stem sealings ................................7
7.1.1 EPDM-ring stem sealing design ....................... 7
7.1.2 Stuffing box packing design ............................... 8
7.2 Replacement of internal parts ................................ 9
7.2.1 Replacement of plug and stem ......................... 9
7.2.2 Replacement of the seat ring............................. 9
7.3 Tightening torques................................................ 10
7.3.1 Tightening torques for hexagon nuts .............. 10
7.3.2 Tightening torques for seat rings .................... 10
8.0 Troubleshooting ........................................... 10
9.0 Troubleshooting table ..................................11
10.0 Dismantling the valve or the top part ...... 12
11.0 Warranty / Guarantee ................................. 12
12.0 EC declaration of conformity .................... 13
Operating and installation instructions
3-way control valves - STEVI
®
423
DN300
Contents
Series 423