• Valves are technically valvesfittings, but are usually discussed as a separate category.
• In an open valve, fluid flows in a direction from higher pressure to lower pressure. The word is derived from the Latin valva, the moving part of a door, in turn from volvere, to turn, roll.
• Valves are technically valvesfittings, but are usually discussed as a separate category.
• In an open valve, fluid flows in a direction from higher pressure to lower pressure. The word is derived from the Latin valva, the moving part of a door, in turn from volvere, to turn, roll.