Screw Plug Heater

Screw Plug Heaters are smaller versions of Immersion Heaters in which the heater flange is replaced with a Threaded Plug. A Single or multiple tubular heating elements that fit into a thread hexagonal head are then screwed directly through a threaded coupling in the tank wall or vessel or installed process line. Screw plug heaters are an easy way to heat up solutions in smaller containers that may or may not require auto control on temperature. The Heaters can be installed either horizontally or vertically in the tank. The heater is compatible with both Single-phase as well as three-phase power supplies.

The screw plug heaters are also be provided with a Thermowell, in which a temperature sensor can be installed for the Temperature monitoring and control purpose. In most of the applications, a simple thermostat will be installed inside the thermowell and pre-wired with the installed heater to ensure the heater is ON / OFF at a pre-set temperature. The Thermostat knob can be projected outside the terminal cover for easy access of the operator.

Key Features

Construction

1. Nickel Chromium Resistance wire for high mechanical and creep strength for maximum heater life. Nickel-Chromium resistance coil is fusion welded to the metallic terminal pins.

2. High Purity magnesium oxide fill selected for maximum dielectric strength and thermal conductivity, highly compacted for maximum heat transfer.

3. Stainless steel sheath / Inconel sheath for oxidation and corrosion resistance in a wide variety of environments and are suitable for high temperatures applications

Sheath Selection Guide

The different sheath materials used in these heaters have different watt densities and operating temperatures. While choosing the sheath material following points should be looked at

Applications