Screw plug heaters are designed to heat fluids (water, oil, heavy fuel, glycol, acids, caustic soda, asphalt,etc.) or gases (air, nitrogen, CO2, etc.) by natural or forced convection up to 75 kW, 750 V 3-ph, 400 °C, 25 bar. Horizontal or vertical mounting on the vessels for statics fluids or inside vessels for fluid circulation heaters. Screw plug heaters comprise a very compact bundle of pin heating elements available in several materials compatible with the fluids to be heated (steel, stainless steel, Incoloy®, etc.). The heating elements are brazed or welded onto a threaded plug conforming to the metric ISO standard (M45x20 and M77x200) or BSPP standard (1″ up to 2″1/2). Screw plug heaters can be equipped with control and safety devices (thermostats, Pt100 sensor, thermocouples, etc.) for the measurement of the temperature in the fluid or of the heating elements.
