What is the maximum operating temperature of a model 244 series actuator?
The maximum temperature for all 244 actuators, and probably 90% of all MTS actuators, is 150F due to the nylon coating in the end caps. The temp rating of the Buna-N seals will exceed this rating.
To keep temperatures safe, the recommendation is to water cool the extension rods that penetrate the heat system. This will thermally isolate the specimen/grip from the piston rod and the load cell.