The design scope of this product line makes it possible to cast large or small diameter disc shaped rings with nominal thicknesses of 5/8″ to 1″. These units are an excellent choice for heating the top or bottom of a cylindrical die. As a standard, Cast-In Ring Heaters are generally manufactured in aluminum because of its superior thermal conductivity. For higher temperature or high watt density requirements, bronze or brass alloys can be used. A variety of standard terminations shown on pages 3-54 and 3-55 are available. The units can be fully machined to include through holes for mounting, thermocouple holes and surface machining.
Standard unless otherwise specified. .315″ diameter heater has 8-32 screw terminals. .430″ diameter heater has 10-32 screw terminals.
Type T: Mica Insulator
Mica insulator is the same diameter as the heating element. .260″ diameter heater has 6-32 screw terminals. .315″ diameter heater has 8-32 screw terminals. .430″ diameter heater has 10-32 screw terminals.
Mica insulator is the same diameter as the heating element. .260″ diameter heater has 6-32 screw terminals. .315″ diameter heater has 8-32 screw terminals. .430″ diameter heater has 10-32 screw terminals.
Type T7: Ceramic Insulator
Ceramic insulator is the same diameter as the heating element. .260″ diameter heater has 6-32 screw terminals. .315″ diameter heater has 8-32 screw terminals. .430″ diameter heater has 10-32 screw terminals
Ceramic insulator is the same diameter as the heating element. .260″ diameter heater has 6-32 screw terminals. .315″ diameter heater has 8-32 screw terminals. .430″ diameter heater has 10-32 screw terminals
Type C4: Heavy Duty Ceramic Insulator with Terminal Cover
Heavy duty ceramic insulator with terminal cover. .315″ diameter heater has 10-32 screw terminals. .430″ diameter heater has 10-32 screw terminals.
Mica washers with 90° blockhead screw terminal with 10-32 screw threads. Available for .315″ and .430″ diameter heaters.
Type R2: Mica Washers with Lead Wire Connection
Mica washers with blockhead and through hole for lead wire connection. Eliminates the use of ring terminals. Available for .315″ and .430″ diameter heaters. Accepts 6-14 gauge wire.
Mica washers with blockhead and through hole for lead wire connection. Eliminates the use of ring terminals. Available for .315″ and .430″ diameter heaters. Accepts 6-14 gauge wire.
Type E: Right-Angle Lug
Right-angle lug welded to pin with mica washer insulators and 10-32 binding head screw. Available for .260″, .315″ and .430″ diameter heaters.
Right-angle lug welded to pin with mica washer insulators and 10-32 binding head screw. Available for .260″, .315″ and .430″ diameter heaters.
Type L and L9: Terminal Lug and Pin
Terminal lug spot welded to pin with 10-32 binding head screw. Available for .260″, .315″ and .430″ diameter heaters. Type L represents straight; Type L9 represents 90° to pin. Specify lug orientation.
Terminal lug spot welded to pin with 10-32 binding head screw. Available for .260″, .315″ and .430″ diameter heaters. Type L represents straight; Type L9 represents 90° to pin. Specify lug orientation.
Type SF and SF9: Quick Disconnect Spade Tabs
Quick-disconnect spade tabs spot welded to pin. Available for .260″, .315″ and .430″ diameter heaters. Type SF represents straight. Type SF9 represents 90° to pin. Specify tab orientation.
Quick-disconnect spade tabs spot welded to pin. Available for .260″, .315″ and .430″ diameter heaters. Type SF represents straight. Type SF9 represents 90° to pin. Specify tab orientation.
Type F: Flexible Lead
Flexible lead: insulated stranded wire crimped to cold pin. Crimp connection is insulated with fiberglass sleeving. Available for .260″, .315″ and .430″ diameter heaters. Wire insulation rated to 250°C, 450°C optional. Specify lead length.
Flexible lead: insulated stranded wire crimped to cold pin. Crimp connection is insulated with fiberglass sleeving. Available for .260″, .315″ and .430″ diameter heaters. Wire insulation rated to 250°C, 450°C optional. Specify lead length.
Type R1: Flexible Armor Cable
Flexible Armor Cable provides excellent protection to lead wires against abrasion and contaminants. Available for .260″, .315″ and .430″ diameter heaters. Specify cable length and lead length. Style may vary from depiction depending on heater diameter and cable diameter used.
Flexible Armor Cable provides excellent protection to lead wires against abrasion and contaminants. Available for .260″, .315″ and .430″ diameter heaters. Specify cable length and lead length. Style may vary from depiction depending on heater diameter and cable diameter used.
Type R1A: Stainless Steel Wire Overbraid
Stainless Steel Wire Overbraid provides flexibility and excellent protection to lead wires against abrasion. Available for .260″, .315″ and .430″ diameter heaters. Specify stainless steel wire overbraid length and lead length. Style may vary from depiction depending on heater diameter and braid diameter used.
Stainless Steel Wire Overbraid provides flexibility and excellent protection to lead wires against abrasion. Available for .260″, .315″ and .430″ diameter heaters. Specify stainless steel wire overbraid length and lead length. Style may vary from depiction depending on heater diameter and braid diameter used.
Type MR: Strain Relief and Lead Wire – Moisture Resistant
Moisture resistant shrink strain relief and lead wire with or without stainless steel overbraid. Available for .260″, .315″ and .430″ diameter heaters. Specify lead wire and overbraid length. Maximum operating temperature is 350°F (177°C).
Type MR: Strain Relief and Lead Wire – Moisture Resistant
Moisture resistant shrink strain relief and lead wire with or without stainless steel overbraid. Available for .260″, .315″ and .430″ diameter heaters. Specify lead wire and overbraid length. Maximum operating temperature is 350°F (177°C).
Type TS: Teflon® Sleeving over Lead Wire
Contamination seal shrink-down Teflon® sleeving over the heater and lead wire splice. Provides a good moisture resistant seal. Maximum operating temperature 500°F (260°C). Available for .260″, .315″ and .430″ and diameter heaters. Specify lead length.
Contamination seal shrink-down Teflon® sleeving over the heater and lead wire splice. Provides a good moisture resistant seal. Maximum operating temperature 500°F (260°C). Available for .260″, .315″ and .430″ and diameter heaters. Specify lead length.
Type P1: Quick Disconnect Plug
Quick-disconnect plug, either mounted directly on casting or on elements ends offset a specified distance from casting. Rating: 16A-250VAC.
Quick-disconnect plug, either mounted directly on casting or on elements ends offset a specified distance from casting. Rating: 16A-250VAC.
Termination Protection
No options available for this section based on your selections
Type C2: Standard Terminal Box (on flat pad)
Type C2 is an individual terminal box for protecting the terminals on each Cast-In Band Heater half and on many other Cast-In Heater designs with one set of heater terminals. The C2 box design requires a flat pad on half-round castings or a flat surface on other casting designs for mounting. It is made from heavy gauge, rust-resistant sheet metal. The cover is removable for easy access to terminals. The box has two 7/8″ diameter knockouts opposite each other for standard 1/2″ BX connectors.
Type C2 is an individual terminal box for protecting the terminals on each Cast-In Band Heater half and on many other Cast-In Heater designs with one set of heater terminals. The C2 box design requires a flat pad on half-round castings or a flat surface on other casting designs for mounting. It is made from heavy gauge, rust-resistant sheet metal. The cover is removable for easy access to terminals. The box has two 7/8″ diameter knockouts opposite each other for standard 1/2″ BX connectors.
To simplify installation, Cast-In Heaters fitted with boxes can be factory pre-wired with high temperature lead wire that can be protected with armor cable. If one of these options is required, specify terminal box type, lead wire and cable length.
Satisfies NEMA 1 requirements.
Standard C2 box size: L = 4″ W = 2-1/2″ H = 2-1/8″
Type EP: Explosion & Moisture Resistant Box
Cast iron explosion and moisture resistant boxes should be used in areas where the surrounding air may become contaminated with combustible gases or a high humidity level may exist. Installation requires one box per Cast-In Heater half and they are brazed to the tubular heater. The standard box has one 1/2″ NPT hub.
Cast iron explosion and moisture resistant boxes should be used in areas where the surrounding air may become contaminated with combustible gases or a high humidity level may exist. Installation requires one box per Cast-In Heater half and they are brazed to the tubular heater. The standard box has one 1/2″ NPT hub.
Optional: Two hubs per box available. Cast-In Heater fitted with boxes can be factory prewired with high temperature lead wire, protected with special armor cable. If either of these options is required, please specify the following:
No options available for this section based on your selections
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125 RMS Standard
RMS Surface Finish as defined in ASME B46.1 — RMS is the root mean square of the profile height deviations from the mean line, recorded within the evaluation length. The standard surface finish for the machined surface of Tempco cast-in heaters is 125 RMS. Consult Tempco if a different surface finish is required.
RMS Surface Finish as defined in ASME B46.1 — RMS is the root mean square of the profile height deviations from the mean line, recorded within the evaluation length. The standard surface finish for the machined surface of Tempco cast-in heaters is 125 RMS. Consult Tempco if a different surface finish is required.
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Special Features
Electroless Nickel-Plated — A plating technique (without using an electric current) used to deposit a coating of nickel on a substrate to prevent corrosion, wear and also as a protective coating.
Teflon Coating — Teflon is non-reactive so it is often used in containers and pipework for reactive and corrosive chemicals.
Hard coat anodizing — Anodizing increases resistance to corrosion and wear.
Magnaplate — Strong wear and corrosion resistance non-stick coating that withstands high temperatures.
Electroless Nickel-Plated — A plating technique (without using an electric current) used to deposit a coating of nickel on a substrate to prevent corrosion, wear and also as a protective coating.
Teflon Coating — Teflon is non-reactive so it is often used in containers and pipework for reactive and corrosive chemicals.
Hard coat anodizing — Anodizing increases resistance to corrosion and wear.
Magnaplate — Strong wear and corrosion resistance non-stick coating that withstands high temperatures.
Type TS: Teflon® Sleeving over Lead Wire Contamination seal shrink-down Teflon® sleeving over the heater and lead wire splice. Provides a good moisture resistant seal. Maximum operating temperature 500°F (260°C). Available for .260″, .315″ and .430″ and diameter heaters. Specify lead length. Electrical Terminations Additional Options Aluminum (standard) Bronze Cast Materials Customer Specified Finish Explosion Resistant Lead Wire (w/ & w/out protection) Moisture Resistant NEMA Rated None Sheet Metal Special Features Standard Finish Termination Protection Type T7: Ceramic Insulator Ceramic insulator is the same diameter as the heating element. .260″ diameter heater has 6-32 screw terminals. .315″ diameter heater has 8-32 screw terminals. .430″ diameter heater has 10-32 screw terminals Screw Terminals Type T: Mica Insulator Mica insulator is the same diameter as the heating element. .260″ diameter heater has 6-32 screw terminals. .315″ diameter heater has 8-32 screw terminals. .430″ diameter heater has 10-32 screw terminals. Type SF and SF9: Quick Disconnect Spade Tabs Quick-disconnect spade tabs spot welded to pin. Available for .260″, .315″ and .430″ diameter heaters. Type SF represents straight. Type SF9 represents 90° to pin. Specify tab orientation. Lugs Pins Type S: Heavy Duty Ceramic Insulators (Standard) Standard unless otherwise specified. .315″ diameter heater has 8-32 screw terminals. .430″ diameter heater has 10-32 screw terminals. Type R2: Mica Washers with Lead Wire Connection Mica washers with blockhead and through hole for lead wire connection. Eliminates the use of ring terminals. Available for .315″ and .430″ diameter heaters. Accepts 6-14 gauge wire. Type R1A: Stainless Steel Wire Overbraid Stainless Steel Wire Overbraid provides flexibility and excellent protection to lead wires against abrasion. Available for .260″, .315″ and .430″ diameter heaters. Specify stainless steel wire overbraid length and lead length. Style may vary from depiction depending on heater diameter and braid diameter used. Type R1: Flexible Armor Cable Flexible Armor Cable provides excellent protection to lead wires against abrasion and contaminants. Available for .260″, .315″ and .430″ diameter heaters. Specify cable length and lead length. Style may vary from depiction depending on heater diameter and cable diameter used. Type R: Mica Washers Mica washers with 90° blockhead screw terminal with 10-32 screw threads. Available for .315″ and .430″ diameter heaters. Type P1: Quick Disconnect Plug Quick-disconnect plug, either mounted directly on casting or on elements ends offset a specified distance from casting. Rating: 16A-250VAC. Quick Disconnect Type P: Plain Pin Plain terminal pin. Specify Length “L.” Standard 1/2″ (12.7 mm) pin length. Type MR: Strain Relief and Lead Wire – Moisture Resistant Moisture resistant shrink strain relief and lead wire with or without stainless steel overbraid. Available for .260″, .315″ and .430″ diameter heaters. Specify lead wire and overbraid length. Maximum operating temperature is 350°F (177°C). Type L and L9: Terminal Lug and Pin Terminal lug spot welded to pin with 10-32 binding head screw. Available for .260″, .315″ and .430″ diameter heaters. Type L represents straight; Type L9 represents 90° to pin. Specify lug orientation. Type F: Flexible Lead Flexible lead: insulated stranded wire crimped to cold pin. Crimp connection is insulated with fiberglass sleeving. Available for .260″, .315″ and .430″ diameter heaters. Wire insulation rated to 250°C, 450°C optional. Specify lead length. Type EP: Explosion & Moisture Resistant Box Cast iron explosion and moisture resistant boxes should be used in areas where the surrounding air may become contaminated with combustible gases or a high humidity level may exist. Installation requires one box per Cast-In Heater half and they are brazed to the tubular heater. The standard box has one 1/2″ NPT hub. Optional: Two hubs per box available. Cast-In Heater fitted with boxes can be factory prewired with high temperature lead wire, protected with special armor cable. If either of these options is required, please specify the following: Number of hubs Cable type Lead wire length Cable length Type E: Right-Angle Lug Right-angle lug welded to pin with mica washer insulators and 10-32 binding head screw. Available for .260″, .315″ and .430″ diameter heaters. Type C4: Heavy Duty Ceramic Insulator with Terminal Cover Heavy duty ceramic insulator with terminal cover. .315″ diameter heater has 10-32 screw terminals. .430″ diameter heater has 10-32 screw terminals. Type C2: Standard Terminal Box (on flat pad) Type C2 is an individual terminal box for protecting the terminals on each Cast-In Band Heater half and on many other Cast-In Heater designs with one set of heater terminals. The C2 box design requires a flat pad on half-round castings or a flat surface on other casting designs for mounting. It is made from heavy gauge, rust-resistant sheet metal. The cover is removable for easy access to terminals. The box has two 7/8″ diameter knockouts opposite each other for standard 1/2″ BX connectors. To simplify installation, Cast-In Heaters fitted with boxes can be factory pre-wired with high temperature lead wire that can be protected with armor cable. If one of these options is required, specify terminal box type, lead wire and cable length. Satisfies NEMA 1 requirements. Standard C2 box size: L = 4″ W = 2-1/2″ H = 2-1/8″ Electroless Nickel-Plated — A plating technique (without using an electric current) used to deposit a coating of nickel on a substrate to prevent corrosion, wear and also as a protective coating. Teflon Coating — Teflon is non-reactive so it is often used in containers and pipework for reactive and corrosive chemicals. Hard coat anodizing — Anodizing increases resistance to corrosion and wear. Magnaplate — Strong wear and corrosion resistance non-stick coating that withstands high temperatures. This Cast-In will not have Terminal Protection. Please specify a finish. 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 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 Material: Optional Aluminum 356 Maximum Surface Temperature: 750°F (399°C) Density (lb/in3): 0.0968 Coefficient of Linear Thermal Expansion (in/in/°F × 10-6): 12.9 @ 68° – 572°F Thermal Conductivity (BTU-in/hr-ft2-°F): 1160 125 RMS Standard RMS Surface Finish as defined in ASME B46.1 — RMS is the root mean square of the profile height deviations from the mean line, recorded within the evaluation length. The standard surface finish for the machined surface of Tempco cast-in heaters is 125 RMS. Consult Tempco if a different surface finish is required.
