Description

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The explosion-proof flanged immersion heaters from Shenglong Heaters are one of the most widely used solutions for heating fluids and gases. Designed for use in tanks, vessels, and in-line heating, Shenglong’s explosion-proof flanged immersion heaters are easy to install and maintain.

HI-POT Test	1500V/S min cold condition
Insulation resistance	20M Ω min
Leakage current	0.75ma max
Power tolerance	+5%,-10%
Voltage	120V-440V
Diameter range	1mm to 40mm
Heating resistance wire	0Cr25Al5,Cr20Ni80 or as custom's requirement
Air tubular heater wattage	≥ 2w-4w/cm2
Water tubular heater wattage	≥ 6w-10w/cm2
Dies and fin tubular heater	≥ 8W-12w/cm2

Optional Features

Extended terminal box

Provided when necessary to allow for cooler operation of the terminal box. This allows the heating elements to be sealed with epoxy or RTV and for the customer to provide incoming wire with a much lower insulation temperature rating.

ASME

The heater can be supplied in accordance with ASME section VIII Div. 1 U-Part stamped and certified.

Thermostats

Bulb and capillary pilot duty or load carrying thermostats can be provided to control the heater. The thermostat bulb can be installed in a thermowell to sense process or element sheath temperature.

Thermocouples

Type J or K thermocouples can be provided to monitor the process or element sheath temperatures. Thermocouples provided with a ceramic wafer head and screw terminals for ease of wiring. Alternate type E or T available.

Hermetically sealed element terminations

A ceramic to metal soldered seal can be provided to eliminate the possibility of moisture from entering the heating element.

Removable bussing

Allows troubleshooting and isolation of a failed heating element.

Cross-baffle

Construction utilizes alternating half baffles spaced closely to cause increased flow velocity across the heating elements to allow better heat transfer from the elements to the fluid.

Add support rods for flanges with length less than 30"

Support rods can be added to shorter heater with high flow to keep the element support spacers in place.

Larger heater circuits for greater than 48A per circuit

Heavy wall pipe design

Element bundles with smaller outside diameter can be provided for any flange size requested.

Pickle and Passivate

A chemical treatment in nitric acid can be performed to remove free iron from the outer surface of stainless steel for applications sensitive to contaminants.

Electro-polish

Is a process similar to plating using cathode and anode reactions but material is removed rather than added to the heater surfaces in order to provide a clean and bright finish.

Ring and cover weatherproof or corrosion resistant enclosures

Heavy duty pipe and plate construction.

Other element sheath and flange materials available.

explosion proof immersion heater