BSI - BS EN 593
Industrial valves. Metallic butterfly valves
|Publication Date:||15 June 1998|
|ICS Code (Gate valves):||23.060.30|
Specifies requirements for butterfly valves nominal pressures to PN 40 and Class 300, sizes DN 40 to DN 2000. Recommendations for Class 125 cast iron valves are provided in the National Annex NA.