NEN EN 50216-8 : 2005 AMD 1 2006
Current
The latest, up-to-date edition.
POWER TRANSFORMER AND REACTOR FITTINGS - PART 8: BUTTERFLY VALVES FOR INSULATING LIQUID CIRCUITS
12-01-2013
1 Scope
2 Normative references
3 Requirements and characteristics
3.1 Description
3.2 Operating characteristics
3.3 Components characteristics
4 Assembly arrangements and dimensions
4.1 Types of assembly
4.2 Overall dimensions
5 Dimensions and types of gaskets, dimensions of gasket
seats
5.1 General
5.2 Gaskets and gasket material
5.3 Admissible operating conditions
5.4 Design criteria for gasket seats - Choice of flange
gaskets
6 Performances
6.1 Tightness of the mounted valve
6.2 Tightness of the butterfly blade
6.3 Operating torque
6.4 Maximum working overpressure with the butterfly valve
in open and closed position
7 Tests
7.1 Tightness of the mounted valve
7.2 Tightness of the butterfly blade
7.3 Operating torque
7.4 Maximum working overpressure with the butterfly valve
in open and closed position
8 Supply conditions
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