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...
HVAC articles
Technical articles on HVAC: valve and expansion joint selection, application and installation notes.
Articles
6 min read
Vibration-Absorbing Joints: Cutting the Path at Pumps, Compressors and Fans
Much of the noise a pump makes travels through pipe and concrete rather than air. A vibration-absorbing joint cuts that path — but...
6 min read
Static Balancing Valves: Measuring Flow and Locking the Setting
In an unbalanced system the branch near the pump takes too much flow and the far branch too little. A static balancing valve makes...
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.
6 min read
Pipe Expansion Joints: Expansion Accumulating in a High-Rise Riser
In a riser, expansion accumulates over the whole run rather than per floor. The first symptoms are banging inside the shaft and le...
5 min read
Three-Way Ball Valves: In Diverting and Mixing Circuits
One body doing the work of two valves. But an L port and a T port are not the same thing, and confusing them leaves the circuit op...
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
Elastomer Selection in Rubber Expansion Joints: Ambient Matters as Much as Fluid
In a rubber expansion joint the decision that sets service life is the body compound, and it depends not only on the fluid but on...
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.
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