Part # 71-175A-1-20
Enclosure Package to prevent freezing in 2" Flanged 150RF-600RF Fisher Big Joe 627 regulator. 12 volt start. Single heater package without 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: