If you have gaps between the nuts and attachments then the rods are not control rods. Rods with gaps are limit rods (And you do not have true universal compensator). Loose rods are used to limit damage if your anchor/s fail. This type of compensator will alway have full pressure thrust. You will have large nozzle loads.
Before you continue you need to figure out:
- do you need a compensator
- is the selected type correct compensator type
My bet is that you have incorrect type/arrangement. Check 3 hinge compensators in 3 pin system. May solve your problems if you have axial and lateral movement.
To answer your original question. Compensator designer requires a lot of info to design any compensator correctly. There are only few companies, which try to give full details. Typical list includes movements, , pipe dims, pressure, temperature, external loads, space limitations, material limitations, what is inside, what is outside, flow conditions, cycle requirements, pipe design code, bellows design code, pressure test requirements, NDT requirements, marking, packing, installation position...
_________________________
Regards,
Jouko
jouko@jat.co.za