DN and NPS are the two main valve sizing systems used worldwide, but they are not direct conversions. This guide explains how metric and imperial valve sizes relate, when differences matter, and how to use DN vs NPS size charts correctly.

Pipe size and valve size are often assumed to be the same, but internal bore, pressure class, and valve design can change flow behaviour dramatically. This guide explains why pipe size and valve size don’t always match and how to avoid common mistakes.

Full bore and reduced bore valves may share the same nominal size, but their internal bore dramatically affects flow, pressure drop, and efficiency. This guide explains the differences and when each type should be used.

Valve nameplates contain essential information about size, pressure rating, material, and operating limits. This guide explains how to read valve size markings and nameplates correctly to avoid installation and compliance issues.