Download this 4-page tutorial by Mike Adkins, Senior Manager, Product Line Management at Swagelok; you'll also get a helpful bulletin and worksheet
When selecting a valve for an instrumentation system, your choices may seem overwhelming. There are ball valves, diaphragm and bellows valves, as well as check valves, excess flow valves, fine metering, gate, multi-port, needle, plug, relief, rising plug, and safety valves. Each comes in many sizes, configurations, materials of construction, and actuation modes. Get three resources designed to help you choose the right valve for each job.
1 - Matching Valve Type to Function: A Tutorial in Valve Selection (4 page PDF) by Mike Adkins, covers:
- On-off valves
- Directional flow valves
- Flow-control valves
- Overpressure protection valves
- Excess flow valves
- Selection guideline summary
2 - The Valve Sizing Technical Bulletin (11 page PDF) issued by Swagelok shows how flow can be estimated well enough to select a valve size—easily, and without complicated calculations. It includes:
- Principles of flow calculations
- Basic formulas
- Effects of specific gravity and temperature
- Six simple graphs for estimating the flow of water or air through valves and other components
- Examples of how to use valves
The Valve Selection Worksheet (2 page PDF) covers valve function, system conditions, flow, and many other factors such as actuation method, lock-out / tag-out, position indicator, materials of construction, and more.
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