• BS EN 1983-2006 工业用阀 - 钢制球阀 Industrial valves steel ball valve.pdf
• BS EN 19-2002 工业阀门. 通用标记 Industrial valves. Marking of metallic valves.pdf
• BS EN 12569-1999 Industrial valves - Valves for chemical and petrochemical process industry - Requirements and tests.pdf
• BS EN 12266-2:2002 Industrial valves-Testing of valves-Part 2: Tests test procedures and acceptance criteria-Supplementary requirements.pdf
• BS EN 1171-2002 industrial valves-cast iron gate valves.pdf