Metso Jamesbury 4000 Series, Руководство по безопасности

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2 Jamesbury 3-Piece Ball Valves, Series 4000, Threaded End, Socket Weld, Butt Weld, Rev 2.0, Safety Manual
Table of Contents
1 Introduction .............................................................................................................................................3
2 Structure of the 3-piece ball valves ........................................................................................................3
2.1 Components and description of use .......................................................................................................................... 3
2.2 Permitted valve types ..................................................................................................................................................... 3
2.3 Supplementary valve documentation ...................................................................................................................... 3
3 Using the 3-piece ball valve in safety systems ......................................................................................3
3.1 Safety function ................................................................................................................................................................... 3
3.2 Environmental and application restrictions ............................................................................................................ 4
3.3 Useful lifetime .................................................................................................................................................................... 4
3.4 Connecting the 3-piece ball valve to a safety system .......................................................................................... 4
3.5 Random hardware integrity ........................................................................................................................................ 5
3.6 Systematic integrity .......................................................................................................................................................... 5
3.7 Additional information .................................................................................................................................................... 5
4 Installation ...............................................................................................................................................6
5 Operation .................................................................................................................................................6
5.1 Recommended proof test .............................................................................................................................................. 6
5.2 Recommended partial stroke test .............................................................................................................................. 6
5.3 Maintenance ....................................................................................................................................................................... 7
6 References ................................................................................................................................................7
Appendix 1. Examples of reliability (PFD) calculations for complete final elements ..................................................... 7
Appendix 2. Equations to calculate PFD for 1oo1 and 1oo1D final elements.................................................................. 8