Anderson-Bolds has been providing electric heating elements for heating water since 1934. The first choice in heaters for industrial accounts to heat water tanks are screw plug electric immersion heaters. The Screw Plug is easily installed via an NPT fitting in the tank wall. The heater should be located near the bottom of the tank as when the heater is on it creates a convection within the tank. The heater heats by conduction, or contact with the media. But as water is heated or warmed by the immersed elements the warm water rises to the top of the tank. The water below the heating element in a tank will not be heated. Copper is the preferred sheath material for heating water. Copper has the best heat transfer capability but also the lowest max temperature of about 750 degrees F. Level control and temperature control can be critical to keeping the elements from burning out. If the tank drains to expose the heaters and they are energized, they will fail quickly. Air is a poor heat conductor and thus the elements will quickly heat up to over 350 degrees. An element on an electric range is made of Incoloy, when the element turns red, the temperature is about 1250 degrees F.
Screw plug immersion heaters consist of tubular elements in a threaded hex plug. Some models are provided with a thermowell for the temperature control sensor and a variety of electrical enclosures for electrical connections. They screw directly through threaded openings in tank walls to heat liquids, viscous fluids, forced air, and gases by direct contact.
Screw Plug Immersion Heaters can have NEMA 1 housing or general purpose housing for in plant use.
Screw Plug Immersion Heaters can have Moisture resistant housing for wet locations, indoors or outdoors.
Screw Plug Immersion Heaters can have Explosion Resistant housing for hazardous rated areas.
Screw Plug Immersion heaters can also have Thermostats built into the enclosure. the Thermostats can handle up to 22 AMPS. If three phase or above 22 amps, a three pole contactor will be required to switch on the heating elements.
Screw Plug heaters with integral thermostat, 0-100 degrees F adjustability.
Screw Plug heaters with integral thermostat, 60-250 degrees F adjustability.
For level control, please go to our level control page here.
For contactors, please go to our contactor page here.
Please visit our immersion heater application data form here and Anderson-Bolds can help pick an immersion heating system for you.
email us at info@anderson-bolds.com
or call us at 216-360-9800
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