Zall,

Nobody can answer that question without more exacting details on the support, except the person who can drive its design accordingly.

I will note that you have 2 +Y supports in close proximity to each other in this design. The only way the valve could rotate in the Z axis is if the line picks up off of one versus the other. Thus, it's likely that the RZ component is superfluous, regardless if it's actually true.

I will also note that if you have two limits without gaps between the two, you're going to end up with incredibly huge loads between the two. This is fine, unless you're using CAESAR to drive the design of the support. Simply having one limit should be sufficient for the task at hand.