There are quite a few different types of connections used to install valves and other process components in piping of process systems. While they all perform the same function of connecting the valve into the piping system and allowing it to perform its function, each connection type has its own pros and cons. The selection of the best valve connection type for your application is based on many factors: Factors for Selecting a Connection Type Pressure rating/system pressure Leakage prevention Ease of installation Permanence of valve Ease of removal for repair or replacement Inventory simplification Adherence to industry and/or plant standards Weight and size Cost Categories of Valve Connection Types There are 5 general categories that all connection types fall into. They are: Threaded Welded / Soldered / Glued Flanged / Lugged / Wafer Compression Union Manifold-mount
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