- What is the ultimate function of the valve? On/off, control, backflow prevention, etc.?
- What is the media? Water, Oil, Gas?
Materials of Construction
- Are there chemical compatibility issues with the media and the valve’s composition? Is the media corrosive or destructive to the body, seat or liner?
- Are there environmental considerations, such as de-zincification from hard water?
- What are the expectations for maintenance over the lifespan of the valve? Will the valve be accessible?
Valve Sizing and Performance
- What is the required flowrate?
- What is the operating pressure, including upstream and downstream requirements?
- What are the minimum and maximum operating temperatures?
- Any other design requirements for the piping system?
Actuation, Connections and Certifications
- How is the valve going to be operated? Manually? Automatically?
- How is the valve to be installed? Threaded pipe? Soldered or brazed? Flanged? Pressed?
- What are the applicable industry standards and codes that must be met?