The Silver Star can only be awarded for actions under enemy fire. There is no need to distinguish combat awards from non-combat awards because there is no such thing as a non-combat Silver Star. The 'gallantry' contained in the basic award itself surpasses 'valor' in military awards terminology.
The "V" device is used on medals that could be awarded for either combat or non-combat actions, such as the Bronze Star. The "V" device is used to indicate that it was awarded for actions performed in combat.
I should have been more clear about my post. I was being sarcastic. Redundant if you will. I realize that you can display heroism or you can be heroic. It is a bit redundant to be heroic heroism. I have become synical enough over the years that most of what I say will have at least a touch of sarcasm in it. Sorry if this is something that offends some of you.