Screw Plug Immersion Heater

Screw Plug Immersion Heater - all applications must consider the suitability of the sheath material, the correct watt density, the screw plug size, available insertion length, and appropriate terminal enclosure.

Call ASB Heating Elements Ltd., for Technical Assistance: 1-800-265-9699

Screw Plug Immersion Heater

Immersion heaters come in a wide variety of configurations, styles, and shapes.
Our goal is create a simple yet effective design to solve any fluid-heating environment you have. By selecting the best sheath material, choosing the optimum fitting method and manufacturing the elements to any desired watt density, you can expect the optimum engineered heating solution for your requirements.
Fast delivery gets you this perfect heater almost immediately.

A Screw Plug Immersion Heater can have from 1 to 3 elements, or blades, either welded or brazed into the screw plug.

General Purpose Enclosure (NEMA 1)	Built-In Thermostat General Purpose Enclosure (NEMA 1)
	Built-In Thermostat General Purpose Enclosure (NEMA 1)

Our terminal boxes for Explosion Resistant (ER) and Moisture Resistant (MR) environments are a similar construction and appearance. The ER boxes undergo an additional hydrostatic test to ensure they maintain the strength requirements for Hazardous Locations. All our ER boxes meet the MR specifications

To distinguish the different approved heaters we use the suffix ER or MR.
For example:

1. SPC-3060ER is a Hazardous Location design meeting the CSA Hazardous Location and NEMA 7 approval. It also meets the Class 4 and NEMA 4 designation.

2. SPC-3060MR is a moisture resistant design meeting the Class 4 and NEMA 4 designation.

1" NPT (NEMA 4 and/or NEMA 7)	1" NPT Built-In Thermostat SPST (NEMA 4 and/or NEMA 7)
2" & 2 1/2" NPT (NEMA 4 and/or NEMA 7)	2" & 2 1/2 Built-In Thermostat SPST (NEMA 4 and/or NEMA 7)
2" & 2 1/2 Built-In Thermostat DPST or TPST (NEMA 4 and/or NEMA 7)

Screw Plug Immersion Heater - Features:

• National pipe thread (NPT) screw into a mating fitting in your tank
• Kilowatt range from low to medium (100 watts to 30 kw)
• Easy to install into your tank
• 1" to 2 ½" NPT available
• Metric and custom screw plugs can be made to match existing tank connections
• General purpose terminal enclosure (NEMA 1), weather resistant terminal enclosure (NEMA 4), and hazardous location terminal enclosure (NEMA 7), available
• Thermocouples, thermostats, and high limit controls can be built-in

Most Common Screw Plugs:

• Brass, mild steel or 316 series stainless steel
• Other materials available
• 1", 1 ¼", 1 ½", 2', and 2 ½" NPT are most common sizes
• Other sizes or metric and British thread sizes can be made

Most Common Sheath Material:

• Copper
• Steel
• Stainless Steel
• Incoloy 800® & Incoloy 840®
• Inconel 600®
• Titanium
• Other Sheath Material Also Offered

Incoloy, Inconel are Inco Ltd registered trademarks.

Most Common Terminal Enclosures

• General Purpose NEMA1
• Weather Resistant NEMA 4, NEMA 4X, class 4
• Hazardous Location NEMA 7

Most Common Sheath Materials, Application, and Watt Densities

Built In Thermocouple Options:

• "K" calibration thermocouple for high limit sheath protection
• "J" calibration thermocouple for temperature control

Built In Thermostats:
Power Ratings

• Up to 240 volts, 25-amp single pole, single throw (SPST)
• Up to 240 volts, 25-amp double pole, single throw (DPST)
• Up to 600 volts, 15-amp triple pole, single throw (TPST)
  

Temperature Ranges

• -16 to 40°C (0-100°F)
• 10 to 10°C (50-250°F)
• 70 to 280°C (160-540°F)
• 160 to 370°C (320-700°F)
  

See Spec Sheet