Dear Durga, Mariog,

Throwing our recent experience for such kind of problem.

In our case the vendor asked the same,but in different way, the actuator is in Horizontal direction, 24", length is 3000MM, weight is also very high, & location is near to equipment nozzle Hence we model the actuator in CAESAR as rigid by it's weight & length. check the sagging & surprising we had to put the Spring Support to sustain the weight of actuator & Guide also to prevent vibration.Prepared Special Pipe Support by concerning with client & Valve Vendor.

Also, just near to the valve, drain of small branch vibrate,so,we provide gusseting that drain location on both sides.

I suggest to Provide DX,DY,DZ values to vendor at the last node of valve Actuator.(STATIC ANALYSIS + MODE SHAPE-Graphics)

In your case, is it vertical or horizontal direction, if the length,weight are high, check the actual condition & requirement from vendor as mariog said in his post.

may be it can help you.

Regards
SND