Model HNP

Refractory Nozzle Insulation Kit, For Use with HTP/HTX Thermocouple

The Delta Controls HNP Nozzle Packing kit is design to prevent sulfur components from forming inside the thermocouple nozzle.   

Warning: Do not fill the nozzle with castable refractory.  Any castable will have to be drilled out and removed.


Model HNP Components
  • Prevents sulfur from building up in the thermocouple nozzle
  • Secures and mechanically isolates both ceramic thermowells
  • Resilient, allows movement between the nozzle supported thermocouple and the refractory


  • Pressed Rings (Rigid): 1200°F (650°C) continuous service; calcium silicate blend
  • Compressible Collar and Nozzle Ring: 2300°F (1250°C) continuous service; ceramic fiber blend
  • Instruction Details: Included in package


The correct type and quantity of nozzle packing materials must be used with a Delta Controls Thermocouple. The packing must tightly fill the space between the two wells and the nozzle flange/wall. It must be resilient to allow movement between the shell and the refractory lining. It must be accurately cut and the components installed in the correct sequence to prevent thermowell damage.


Additional Information


Refractory Nozzle Insulation Kit, For Use with HTP/HTX Thermocouple

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