5-Valve Manifolds: The Two Extra Ports and What They Are For
A 5-valve manifold keeps the three valves you know and adds a vent on each leg. What those two extra ports are for.
How to Equalize a 3-Valve Manifold Without Damaging the Cell
The order the three valves move in during a zero check is the difference between a clean reading and a one-sided overload.
Single vs Double Block and Bleed: What the Extra Valve Buys You
Block and bleed is a naming convention before it is a part number. Here is what the second block valve actually buys you.
What Is a Toggle Valve, and Where Does It Belong
The small lever-handled valve on an analyzer panel, what it is built to do, and where it beats a needle valve for isolation.
Sizing a Check Valve by Flow Rate, Not by Line Size
A check valve that matches the pipe on the drawing can still be the wrong check valve for the duty running through it.
Check Valve Orientation: Flow Direction, Mounting Position and Backpressure
Some check valves work in any position and some do not, and the difference is in how the disc or poppet gets back to its seat.
Hydrogen Embrittlement and Austenitic Stainless
Why 316 is treated as a hydrogen-service workhorse, what cold work does to that assumption, and what to confirm before you specify.
Bend Radius, Ovality, and Why the Fitting Leaks Afterwards
A bend changes the tube’s shape, its wall and where it wants to sit. All three land on the next joint down the line.
Choosing Tube Wall Thickness for Pressure and Bending
Wall is the variable that decides how much pressure a run holds, how well a ferrule can swage it, and how tightly you can bend it.
The Gap Gauge Check Nobody Skips Twice
A gap inspection gauge answers one narrow question about a tube fitting joint: did the nut travel far enough on first makeup?