... 3,BMC composite material 4,quality guarantee Explosion proof thermostat used to control the temperature of heating medium, ... ,high mechanical strength,high insulating strength.resist high temperature 300°C and high pressure.Technical parameter:Rated ... 4°CSeal ring inner diameter:Φ14mm.Protection level:IP54Certificate of conformity:NO.CJE×07.123 Heat tracing cable's explosion proof temperature controller ...