Tempco Cast Materials and Cooling Methods
Cast Materials
Aluminum
Material: Standard Aluminum 319 (Optional Aluminum 356 in Learn More)
Maximum Surface Temperature: 700°F (371°C)
Density: (lb/in3): 0.101
Coefficient of Linear Thermal Expansion: (in/in/°F × 10-6): 12.7 @ 68° – 572°F
Thermal Conductivity (BTU-in/hr-ft2-°F): 754
Bronze
Material: Bronze
Maximum Surface Temperature: 1350°F (732°C)
Density: (lb/in3): 0.272
Coefficient of Linear Thermal Expansion: (in/in/°F × 10-6): 9 @ 68° – 572°F
Thermal Conductivity (BTU-in/hr-ft2-°F): 437
Brass
Material: Yellow Brass
Maximum Surface Temperature: 1200°F (649°C)
Density: (lb/in3): 0.304
Coefficient of Linear Thermal Expansion: (in/in/°F × 10-6): 12.2 @68° – 500°F
Thermal Conductivity (BTU-in/hr-ft2-°F): 582
Cooling Methods
None
This cast-in does not need a cooling feature.
Finned without Side Flanges
The standard mounting method for these designs is bolt clamping. An alternative mounting method is to use stainless steel straps. Type “T” screw terminals are the standard termination.
Finned with Side Flanges
The standard mounting method for these designs is bolt clamping. An alternative mounting method is to use stainless steel straps. Type “E” screw terminals are the standard termination.
Liquid Cooled Band – Single Set of Cooling Tubes
The single set cooling tube design features 1/4″, 3/8″ or 1/2″ diameter tubing precisely formed into a serpentine or any other suitable shape and cast into the body of the Cast-In Heater. This is the most widely used method for providing a means of cooling in liquid-cooled Cast-In Heaters. From this basic design, the user can choose to factory equip the cooling tubes with any of the cooling tube termination options.
Liquid Cooled Band – Dual Set of Cooling Tubes
The Dual cooling tube design incorporates two sets of 3/8″ or 1/2″ diameter tubing formed into a serpentine or any other suitable shape within the same Cast-In Heater. Dual cooling tubes will actually double the operating life of a Cast-In Heater with liquid-cool function since cooling tube failures usually occur before heating element failures
Liquid Cooled Band with Recessed NPT Fittings
The recessed cooling tube design incorporates 3/8″ or 1/2″ diameter tubing formed into a serpentine or any other suitable shape with specially designed stainless steel NPT fittings that are welded to the tube ends and cast below the surface of the Cast-In Heater, thus eliminating the troublesome, commonly used tube extensions as they exit the casting for connection to the coolant lines.