7 min read
Expansion Joint Selection: First Read the Movement Correctly
An expansion joint absorbs the movement in the line. If the type of movement is read wrongly, even a correctly manufactured produc...
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Technical Articles
Engineering articles on industrial valve and expansion joint selection, applications, installation and maintenance.
6 min read
Globe, Ball or Gate Valve: Which One Goes Where?
All three valve types shut off the line, but they do not do the same job. Throttling, tight shut-off or low pressure drop — that q...
5 min read
Fire Line Fittings and Periodic Inspection
Fittings on a fire line may stand unused for years and must work first time at exactly the moment they are needed.
5 min read
Butterfly Valves: Space and Cost Advantage on Large Diameters
On large-diameter lines, a butterfly valve instead of a gate valve usually saves space, weight and cost at once.
5 min read
Check Valve Selection and Water Hammer
A check valve stops reverse flow; the real question is how quickly it stops it. A slow-closing check valve becomes the source of w...
6 min read
Fitting Selection for Marine Applications
Three things stress a fitting on board: saltwater, continuous vibration and limited maintenance access. Selection follows all thre...
5 min read
DN/PN and NPS/Class: Two Systems Not to Mix
A Class is not a pressure value. The permissible pressure is read from the standard's table together with material and temperature...
5 min read
Strainers: A Cheap Part That Prevents an Expensive Failure
A strainer is one of the cheapest fittings in a line; the equipment it protects is usually the most expensive.
6 min read
Steam Trap Selection and Common Mistakes
A steam trap is a small fitting, but it directly determines the efficiency of a steam system. A failed trap either leaks live stea...
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