Currently I am working on a draft of a transmission system of LNG. In selecting the type of check valves to install me a question arises, you can use a check valve full port through which it will not be a tool for cleaning and inspection online? In practice what is the pressure difference between a "small step" and a "full step"? From the process point of view which would be the advantages and disadvantages in using these types of check valves? Is there anyone who could give me a cost difference in percentages at least?


In advance thank you all for your responses

Greetings