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...
Blog
Technical Articles
Engineering articles on industrial valve and expansion joint selection, applications, installation and maintenance.
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...
5 min read
Fire Valves on a Ship’s Fire Main: Seawater and JIS Dimensions
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...
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
Class 150, 300, 600: Reading the Pressure-Temperature Table
A Class is not a pressure rating. The allowable pressure is read from the standard’s table together with body material and operati...
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...
Looking for the product described in an article?
Send us your working pressure, temperature and fluid data; our technical team will advise the right product and size.