Inside Sales for Valves 101
Inventory - What do companies usually stock?
Valve Leakage - A Lesson in Leakage
Parts of a Typical Valve
Caring for your Valves - A guide to getting the most out of your valves
Contact - The Valve Pipeline
Multiplying 2.4 by the ANSI will give you a rough estimate of working pressure (except for 150# ANSI which is 285 working pressure). The rest of them are close enough to get you in the ballpark.