Marine articles

Technical articles on Marine: valve and expansion joint selection, application and installation notes.

A ship’s fire main is fed with seawater and waits unused for years. The circuit itself decides the material; the yard’s standard d...

A floor drain’s grating holds coarse solids; its water seal keeps gas from the discharge line out of the space. The second functio...

Sea water is both corrosive and biologically alive. A strainer body and its basket must withstand both — and must not form a galva...

All three hold solids back, but the size of what they catch, how much they can hold and how they are cleaned are not comparable. T...

A valve at the bottom of a tank or down in the bilge can be turned from the deck. The difficulty is not turning it, but the backla...

In a self-closing valve the closing force comes either from a spring or from a weight. The two differ in installation freedom and,...

Three things stress a fitting on board: saltwater, continuous vibration and limited maintenance access. Selection follows all thre...

Air has to leave a tank as it fills and enter as it empties. Block that path and the tank either swells or collapses inward — at s...

The value of a quick-closing valve is not that it shuts fast but that nobody has to enter the hazardous space to shut it. The loca...

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