Selecting an Immersion Heater
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Tube Plugs for Heat Exchangers
Plug leaky internal tubes in heat exchangers with these two-piece ring and pin sets. Insert the ring into the tube and hammer the pin into the ring for a secure seal. If you do not know the tube OD or wall thickness, measure the tube ID and select the closest ring OD.
For technical drawings and 3-D models, click on a part number.
| Ring OD | For Tube Wall Thick. | Temp. Range | Includes | Each | |
For 1/2" Tube OD | |||||
|---|---|---|---|---|---|
| 0.37" | 0.065" | -30°F to 1200° F | One Pin, One Ring | 00000000 | 000000 |
| 0.39" | 0.058" | -30°F to 1200° F | One Pin, One Ring | 00000000 | 00000 |
| 0.4" | 0.049" | -30°F to 1200° F | One Pin, One Ring | 00000000 | 00000 |
| 0.41" | 0.042" | -30°F to 1200° F | One Pin, One Ring | 00000000 | 00000 |
| 0.43" | 0.035" | -30°F to 1200° F | One Pin, One Ring | 00000000 | 00000 |
For 5/8" Tube OD | |||||
| 0.46" | 0.083" | -40°F to 500° F | One Pin, One Ring | 00000000 | 00000 |
| 0.49" | 0.072" | -40°F to 500° F | One Pin, One Ring | 00000000 | 00000 |
| 0.5" | 0.065" | -40°F to 500° F | One Pin, One Ring | 00000000 | 00000 |
| 0.51" | 0.058" | -40°F to 500° F | One Pin, One Ring | 00000000 | 00000 |
| 0.53" | 0.049" | -40°F to 500° F | One Pin, One Ring | 00000000 | 00000 |
| 0.55" | 0.042" | -40°F to 500° F | One Pin, One Ring | 00000000 | 00000 |
| 0.57" | 0.035" | -40°F to 500° F | One Pin, One Ring | 00000000 | 00000 |
For 3/4" Tube OD | |||||
| 0.59" | 0.083" | -40°F to 500° F | One Pin, One Ring | 00000000 | 00000 |
| 0.61" | 0.072" | -40°F to 500° F | One Pin, One Ring | 00000000 | 00000 |
| 0.63" | 0.065" | -40°F to 500° F | One Pin, One Ring | 00000000 | 00000 |
| 0.64" | 0.058" | -40°F to 500° F | One Pin, One Ring | 00000000 | 00000 |
| 0.66" | 0.049" | -40°F to 500° F | One Pin, One Ring | 00000000 | 00000 |
Compact Screw-Plug Immersion Heaters for Oil and Coolant
Heat oil or coolant inside small containers to reduce the viscosity of the liquid and improve flow. These heaters fit in compact openings that are 1 NPT or smaller. With a low-watt density, these heaters operate efficiently and won’t burn out when used with a wide range of oils and coolants. The heating element is made of stainless steel, so it resists corroding when exposed to chemicals.
Both ends of these heaters are threaded, so one side fits into your tank and the other can be threaded into a conduit to protect the wiring. For the most evenly distributed heating, choose the largest length of heater that will fit in your container. To control the settings of the heater, they must be connected to a temperature switch or controller (required but not included).
Note: Fully submerge the heating element in liquid to prevent heater failure.
For technical drawings and 3-D models, click on a part number.
Heating Element | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Wattage, W | Watt Density, W/sq. in. | Current, A  | Lg. | Wd. | Pipe Size | Thread Type | Gender | Wire Lead Lg. | For Use With | Each | |
316 Stainless Steel Heating Element with 316 Stainless Steel Body | |||||||||||
120V AC, Single Phase | |||||||||||
| 25 | 20 | 3.5 | 1 5/8" | 1/4" | 1/8 | NPT | Male | 6" | Ethylene Glycol, Hydraulic Oil, Propylene Glycol, Water | 0000000 | 0000000 |
| 35 | 20 | 6 | 1 9/16" | 3/8" | 1/4 | NPT | Male | 6" | Ethylene Glycol, Hydraulic Oil, Propylene Glycol, Water | 0000000 | 000000 |
| 70 | 20 | 3.5 | 4 5/8" | 1/4" | 1/8 | NPT | Male | 6" | Ethylene Glycol, Hydraulic Oil, Propylene Glycol, Water | 0000000 | 000000 |
| 100 | 20 | 6 | 4 9/16" | 3/8" | 1/4 | NPT | Male | 6" | Ethylene Glycol, Hydraulic Oil, Propylene Glycol, Water | 0000000 | 000000 |
| 100 | 20 | 10 | 2 7/16" | 5/8" | 1/2 | NPT | Male | 6" | Ethylene Glycol, Hydraulic Oil, Propylene Glycol, Water | 0000000 | 000000 |
| 165 | 20 | 15 | 3 3/8" | 3/4" | 3/4 | NPT | Male | 6" | Ethylene Glycol, Hydraulic Oil, Propylene Glycol, Water | 0000000 | 000000 |
| 215 | 20 | 10 | 5 7/16" | 5/8" | 1/2 | NPT | Male | 6" | Ethylene Glycol, Hydraulic Oil, Propylene Glycol, Water | 0000000 | 000000 |
| 285 | 20 | 25 | 4 5/16" | 1" | 1 | NPT | Male | 6" | Ethylene Glycol, Hydraulic Oil, Propylene Glycol, Water | 0000000 | 000000 |
| 300 | 20 | 15 | 6 3/8" | 3/4" | 3/4 | NPT | Male | 6" | Ethylene Glycol, Hydraulic Oil, Propylene Glycol, Water | 0000000 | 000000 |
| 470 | 20 | 25 | 7 5/16" | 1" | 1 | NPT | Male | 6" | Ethylene Glycol, Hydraulic Oil, Propylene Glycol, Water | 0000000 | 000000 |
Screw-Plug Immersion Heaters for Oil and Coolant
To heat oil and coolant without creating hot spots and damaging the heating element, these heaters have a lower watt density than heaters for water or chemicals. They install into threaded container openings or pipe couplings to quickly and efficiently heat liquid through direct contact.
Heaters without temperature control require a temperature switch or controller (sold separately) to regulate heat output.
Heaters with an adjustable thermostat automatically turn on when the temperature drops below the set temperature and off when it rises above the set temperature. Adjust the set temperature with the dial.
Incoloy heating elements are more corrosion resistant than steel heating elements.
Note: Fully immerse the heating element in liquid to prevent heater failure. These heaters install through threaded container openings or pipe couplings.
For technical drawings and 3-D models, click on a part number.
Heating Element | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Wattage, W | Watt Density, W/sq. in. | Current, A | Lg. | Wd. | Pipe Size | Thread Type | Gender | Wire Connection Type | For Use With | Each | |
Without Temperature Control | |||||||||||
120V AC, Single Phase | |||||||||||
| 475 | 22 | 4 | 12 9/16" | 15/16" | 1 | NPT | Male | Screw Terminals | Ethylene Glycol Hydraulic Oil Machine Oil Motor Oil Propylene Glycol Water | 00000000 | 0000000 |
| 1,100 | 21 | 9.2 | 28 7/16" | 15/16" | 1 | NPT | Male | Screw Terminals | Ethylene Glycol Hydraulic Oil Machine Oil Motor Oil Propylene Glycol Water | 00000000 | 000000 |
| 1,325 | 20 | 11 | 34 7/8" | 15/16" | 1 | NPT | Male | Screw Terminals | Ethylene Glycol Hydraulic Oil Machine Oil Motor Oil Propylene Glycol Water | 00000000 | 000000 |
With Adjustable Thermostat (60° to 250°F) | |||||||||||
120V AC, Single Phase | |||||||||||
| 475 | 22 | 4 | 12 9/16" | 15/16" | 1 | NPT | Male | Screw Terminals | Ethylene Glycol Hydraulic Oil Machine Oil Motor Oil Propylene Glycol Water | 00000000 | 000000 |
| 1,100 | 21 | 9.2 | 28 7/16" | 15/16" | 1 | NPT | Male | Screw Terminals | Ethylene Glycol Hydraulic Oil Machine Oil Motor Oil Propylene Glycol Water | 00000000 | 000000 |
| 1,325 | 20 | 11 | 34 7/8" | 15/16" | 1 | NPT | Male | Screw Terminals | Ethylene Glycol Hydraulic Oil Machine Oil Motor Oil Propylene Glycol Water | 00000000 | 000000 |
| Replacement Thermostat (60° to 250°F) | 0000000 | Each | 0000000 |