Delta Controls HTP Installation, Operation And Maintenance Manual page 19

Maximum Terminal Enclosure Temperature
T/C types: B,S,R
Materials:
Flange material:
Trim/Bolting/Seats:
Protective well:
Purge Requirements:
* type 'B' thermocouple. Max operating temperature is limited by the thermocouple melting point.
383ºF (195ºC)
SA-516-70 Carbon Steel
Stainless Steel
Blended alumina, ceramic
dry nitrogen, 0.4scfh
Model Numbering System
Page 19