Heating Help

Caleffi with Warmrite system

Hi,
I got an Ipex Warmrite radiant system... I know it's discontinued.
My system works really well when it's work as supposed to.
But I suspect my Caleffi actuator to give some problem.
Link : http://www.caleffi.lt/caleffi/en_NL/Site/Products/Catalogue/args/sezione/Family050_Thermoelectric_zone_valves/path/6~6561~6561_MICRO-details/include/~applications~catalog~serie.jsp/index.sdo

My idea is to replace them with new actuator.
So is the new 656314;
http://www.caleffi.lt/caleffi/en_NL/Site/Products/Catalogue/args/sezione/Family050_Thermoelectric_zone_valves/path/6~6563~6563_MICRO-details/include/~applications~catalog~serie.jsp/index.sdo

Or am I better with another company. The system work during 5 years and I always have erratic problem once in a while.
Idea welcome.
Thanks!