Model HRW


Refractory Protective Well

The Delta Controls Model HRW Well is designed to protect the thermocouple element well from physical damage along with protecting the reactor nozzle and shell from the hot gas convection inside the reactor. The HRW is placed in a hole through the refractory lining in the base of the thermocouple nozzle on the Claus thermal reactor.

The HRW also prevents thermal shock damage to the element well by partially insulating it from sudden severe changes in gas temperature, such as during steam quenching. Several material formulations are offered. Each one enhances various physical characteristics: the various blends are formulated for characteristics of mechanical strength, resistance to thermal shock, and the ability to withstand extremely high temperatures.


  • Protects thermocouple element well from thermal shock, flame impingement and steam quench
  • Formulated material blends provide enhanced resistance to corrosion, temperature, and thermal shock


  Model HRW1: Model HRW2: Model HRWZ:
Material: Mullite ceramic Alumina blend, re- crystallized Zirconia blend, yttria stabilized
Maximum Temperature: +2800 ºF
(+1538 ºC)
+3200 ºF
(+1760 ºC)
+4000 ºF
(+2204 ºC)
Maximum Insertion B: 35 in (889 mm) 35 in (889 mm) 35 in (889 mm)
Well Outside Diameter: 2.0 in (50.8mm) 2.0 in (50.8mm) 2.0 in (50.8mm)

Required Ordering Information

  • Detailed model number
  • Documentation & testing packages (if required, refer to Additional Resources in the product catalog)

Additional Information


Refractory Protective Well

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