Valves are used all along the industrial gas and cryogenic gas supply chains – from production and transportation to trans-fill operations into storage containers. Three categories of valves used are: 1) valves that isolate product flow; 2) valves that control the flow of a gas or liquid, and 3) valves that regulate pressure or flow, or relieve excess pressure. These include globe, gate, ball, butterfly, pressure relief, diverter, needle, check, and diaphragm valves, and regulators.
Part 1 of this primer (gasworld US, February issue) discussed two types of flow control and isolation valves: globe and gate valves, and discussed their basic components, how they function, and their general applications.
Part 2 below will cover the same topics for ball valves, as well as over-all valve design considerations, materials of construction, components and features, installation considerations, and general maintenance.
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