Part # 71-688A-1-40
Enclosure Package to prevent freezing in variety of Kimray 2" NPT or Flanged Backpressure Valves and Regulators. 12 volt start. Single heater package with shutoff valve and thermocouple.
Catco enclosure packages are the most efficient form of freeze prevention on the market. By heating the valve or regulator itself instead of heating the gas, you get much better heat transfer than other methods: