Gas Valve Specs

When you are looking for a gas valve from scratch, you will need to have the below info before you can find a quote. 
  1. Coil voltage, AC or DC?  2. Pipe size?  3. Operating Pressure?  4. Media? Natural gas, Propane...  5. Always Open or Closed?  6. In door or out door? 2, 3 or 4 way?