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...
Installation & maintenance articles
Technical articles on Installation & maintenance: valve and expansion joint selection, application and installation notes.
Articles
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...
6 min read
Hose Connection in a Fire Cabinet and Threaded Fire Valves
A valve in a fire cabinet goes unopened for years, then has to open once, immediately. A few centimetres inside the cabinet either...
6 min read
Hygienic Butterfly Valves: Dead Volume in Food and Pharma Processes
On food and pharmaceutical lines, a valve’s most dangerous property is not leakage but a volume inside it that cannot be cleaned....
6 min read
Lug Type Butterfly Valves: Maintenance Without Draining One Side
A wafer valve is clamped between two flanges; remove one side and it has nothing left to hold it. A lug body bolts to each flange...
6 min read
Knife Gate Valves: Why an Ordinary Gate Valve Jams on Solids-Bearing Lines
On a line carrying solids, an ordinary gate valve failing to close is not a defect but a consequence of its construction. The knif...
6 min read
Gate Valves with Position Indicators: Knowing a Valve Is Actually Shut
A gate valve does not tell you its position. A handwheel that will not turn is not proof of closure, and during commissioning or l...
6 min read
Deck Drains: When the Water Seal Dries, the Protection Is Gone
A floor drain’s grating holds coarse solids; its water seal keeps gas from the discharge line out of the space. The second functio...
6 min read
Expansion Joint End Types: Grooved, Flanged and Weld Neck
The end type decides how fast the line goes up, whether the joint can be removed later, and how many leak points it adds. On a tie...
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