Product Details
Caloritech™ CX series screwplug immersion heaters are designed primarily for water heating in tanks or vessels, featuring brass screwplugs with NPT-style threads and copper sheath elements. The heaters come with optional factory-installed thermostats to regulate liquid temperatures and must be fully immersed in liquid at all times. Commonly equipped with standard 1" to 2-1/2" NPT tapered plugs, custom sizes or plugs can be requested via special order. Thermostat-equipped models with moisture or explosion-proof housings include a terminal block mounted on a slide-out trolley for convenience. Installed through a threaded half coupling positioned well below the minimum liquid level to prevent sludge buildup, these heaters ideally operate horizontally; however, vertical installation may be possible with prior consultation from the factory. The heaters achieve close to 100% efficiency, promoting safety, easier control, and typically lower installation costs compared to gas or oil alternatives. It is essential to maintain a proper balance of convection currents and temperature difference for efficient heat transfer, particularly when heating viscous liquids, which hinder convection. Dimensions, specifications, certifications, and compliance information are available upon request, along with warranty terms for the product.








