Hi
As a starting point a Process Operators course could be useful to gain a knowledge of the application of valves in the oil and gas industry.
There are similar courses in each state in Oz.
See the attached link for some more details...
The FCx Truflo valve has a top entry and tapered seats this valve is used in Cryogenic applications and also very high temp applications.
http://www.fcx-truflo-rona.com/