Full Port is "true full", and can be a relative term based on the I.D. of your Pipe (Schedule of your pipe).
Regular Port, or Standard Port is one pipe size down.
Reduced Port is (2) pipe sizes down.
MARKFLOW
Contact www.mogas.com. Mogas purchased a patented gas control valve trim for ball valves last winter, called Flexstream. It has some very unique features. MARKFLOW
Yes they can, but you MUST specify as many of the manufacturers do not do it as standard in "both" directions.
They must change something, add something, or test differently.
MARKFLOW