A comprehensive introduction to valves. Everything you need to know from valve types and standards to materials and uses.
Definition and Details of Flanges, PDF, Screw
List of relevant standards in the valve industry - FCValves
Valves 101: Valve Types, Sizes, Standards & More - Unified Alloys
Valve Types and Applications
Federal Register :: Hazardous Materials: Harmonization With International Standards (RRR)
Types of Valves Guide 101 - Premium Residential Valves and Fittings Factory
ISO 10423:2009(en), Petroleum and natural gas industries — Drilling and production equipment — Wellhead and christmas tree equipment
LK Valves Product Catalogue Rev. 6, PDF, Valve
Valves 101: Valve Types, Sizes, Standards & More - Unified Alloys