รายละเอียด Watlow manufactures high-temperature tubular heaters to bridge the gap between standard tubular heaters and Watlow MULTICELL™ heaters. This high temperature heater is well suited for process air heating applications in excess of 1300˚F (704˚C), resulting in a maximum sheath temperature of 1800˚F (983˚C). Controlled lab testing between the new design and current tubular designs shows an increase in life of approximately 50 percent.
The high-temperature heaters consist of an engineered tubing with an outer sheath of Alloy 600 and a special internal construction. The outer sheath offers high temperature capabilities, reduced oxidation as well as corrosion resistance.
The tubular heater offering is available in 0.430 and 0.375 inch diameters that are configurable either as formed tubulars or process heaters. The tubular heaters can also be welded to flanges and plates for mounting purposes. Maximum sheath length available is 275 inches for the 0.430 inch and 0.375 inch diameters. The factory should be contacted for longer sheath lengths.
Features & Benefits Three-phase capability results in one element versus three, lower amperage, reduced installation time and lower overall cost
Multiple coil operations reduces inventory by allowing dual voltage capability
Internal thermocouple construction eliminates contamination buildup around the external sensing tip, reducing the possibility of false readings
Versatile forming capabilities forms into many configurations

Material Maximum Operating Temperatures Maximum Watt Densities
W/in2 W/cm2
304 Stainless Steel 1200 650 45 6.9
316 Stainless Steel 1200 650 45 6.9
Alloy 800 1400 760 45 6.9