Brand: Chromalox

Chromalox MT / EMT Clean Water Screw Plug Immersion Heaters

Name: Chromalox MT/EMT Clean Water Screw Plug Heaters – Datasheet
Brand: Chromalox
SKU: MT/EMT

Description

Copper-sheath screw plug heaters for clean water tanks

The Chromalox MT / EMT family are screw plug immersion heaters for clean, non-corrosive water. Hairpin-bent copper tubular elements are brazed into a brass NPT plug that screws straight into a tank wall, so the full element surface heats the water directly. A terminal enclosure on the plug takes the electrical connection and the units have a thermowell for the temperature control sensor, so they are supplied without a thermostat.

Typical uses are heating water in wash tanks, process baths, hot water storage that is not for human consumption, and similar clean-water duties where copper is compatible with the water chemistry. The sheet lists ratings from 0.6 kW in the 1 in plug to 18 kW in the 2-1/2 in plug, at watt densities between 46 and 86 W/in2.

Technical specifications

Parameter	Specification
Series	MT / EMT clean water screw plug immersion heaters (copper sheath, brass plug, hairpin elements)
Application	Clean, non-corrosive water heating by direct immersion through a threaded tank opening; supplied without a thermostat but with a thermowell for the control sensor
Plug and sheath	NPT brass screw plug with copper sheath elements, 1 in to 2-1/2 in NPT depending on series
Watt density	High watt density, 46 to 86 W/in2 depending on series
Terminal enclosures	E1 general purpose (UL Listed, CSA Certified); E2 moisture resistant / explosion resistant (CCSAUS Certified); E4TP moisture resistant
Ordering form	Model, volts, phase, kW, PCN and quantity; suffix E2 or E4TP added to the model for the E2 and E4TP enclosures
Example (MT series, 0.75 kW)	MT-750: 120 or 240 V, 1 phase, 64 W/in2, 1 element, dimension B 6-5/16 in, PCN 036281 (120 V) and 036290 (240 V); MT-750E2 PCN 036425 and 036433; MT-750E4TP PCN 060003 and 060011
Drinking water notice	The sheet states that, under the U.S. Safe Drinking Water Act, the heater may not be used in any service in contact with water for human consumption (non-potable service only)

Series overview and sizes

Series	Plug	Rating	Supply	W/in2	Elements
MT	1 in NPT	0.75 – 3 kW	120, 240 V, 1 ph	64 – 86	1
MT-1	1-1/4 in NPT	0.6 – 2 kW	120, 240 V, 1 ph	53 – 86	1 or 2
MT-2	2 in NPT	1.5 – 15 kW	120, 208, 240, 480 V, 1 ph	46 – 53	1 or 2
EMT-3	2 in NPT	3 – 12 kW	240, 480 V, 3 ph	61 – 67	3
MT-3	2-1/2 in NPT	3 – 18 kW	120, 208, 240, 480 V, 1 and 3 ph	46 – 53	3

For the 1 in NPT MT series the sheet lists models MT-750, MT-1000, MT-1250, MT-1500, MT-2000, MT-2500 and MT-3000, each in 120 V and 240 V, with the dimension B rising from 6-5/16 in at 0.75 kW to 19-7/8 in at 3 kW. The MT-1 series adds models such as MT-160A, MT-110A, MT-112A, MT-115A and MT-120A, and larger plugs carry the higher kW, three-element and three-phase builds.

Selecting an MT or EMT heater

Start from the tank opening: the plug thread must match the available NPT boss, and the hole size minimum on the sheet drawings must be respected. Then choose kW from the heat-up time and losses, the supply voltage and phase, and the enclosure by area: E1 for general purpose, E4TP where moisture is the concern and E2 where an explosion resistant housing is specified. Because the sheaths are copper, confirm the water quality, and use the stainless steel MTS/EMTS or other families for corrosive solutions. Heater controls and sensors can be matched from the HVAC and combustion and temperature ranges.

Always confirm heater length against the tank depth, the thermowell requirement for your controller and any local electrical approvals before ordering.

How the Chromalox MT/EMT works

Copper tubular elements heat when current passes through them. The elements sit directly in the water through a threaded tank opening. A sensor in the thermowell reports the water temperature to an external control. The control switches the heater on and off to hold the set point.

Where the MT/EMT is used

Wash tanks
Process baths
Hot water storage not for human consumption
Clean water tanks
Water chemistry compatible with copper

Selection checklist for the MT/EMT

Heater rating
Plug size
Supply voltage
Phase
Watt density
Terminal enclosure
Thermowell sensor
Water quality

Installation, commissioning and maintenance notes for the MT/EMT

Screw the plug into the tank wall with a suitable sealant. Fit the heater so the elements stay fully covered by water. Connect the supply in the terminal enclosure. Place the control sensor in the thermowell. Check the elements for scale at regular visits.

Requesting a quotation for the Chromalox MT/EMT

Please send the kW rating, the voltage and the plug size. Seven Star LLC serves industrial customers in Oman and the GCC and replies with a quotation based on the information provided.

MT/EMT heater type

It is a screw plug immersion heater.

MT/EMT service

It is for clean, non-corrosive water.

MT/EMT sheath

The elements have a copper sheath.

MT/EMT plug

The plug is brass with an NPT thread.

MT/EMT element shape

The elements are hairpin bent and brazed into the plug.

MT/EMT thermostat

It is supplied without a thermostat.

MT/EMT thermowell

A thermowell holds the control sensor.

MT/EMT plug sizes

Plug sizes run from 1 in to 2-1/2 in NPT.

MT/EMT ratings

Ratings run from 0.6 kW to 18 kW.

MT/EMT watt density

The watt density is between 46 and 86 W/in2.

MT/EMT series

Series include MT, MT-1 and MT-2.

MT/EMT MT series plug

The MT series uses a 1 in NPT plug.

MT/EMT MT-2 series

The MT-2 series uses a 2 in NPT plug and 1.5 to 15 kW.

MT/EMT terminal enclosures

Enclosure options are E1, E2 and E4TP.

MT/EMT ordering

Orders give the model, volts, phase and kW.

MT/EMT example

The MT-750 is a 0.75 kW heater for 120 or 240 V.

MT/EMT drinking water

The heater is for non-potable service only.

Heater records for the MT/EMT

Record the model, the voltage and the date of each scale check.

Choosing the right MT/EMT rating

Choose the rating from the tank volume and the heat-up time.

Documents and quotation

The Chromalox MT/EMT clean water catalog sheet, with all sizes and part numbers, is attached. Seven Star LLC, an independent supplier in Muscat, quotes from the model, voltage, phase, kW and enclosure; stock and lead time are confirmed at quotation.

Datasheets & Documents

Datasheet Chromalox MT / EMT Clean Water Applications screw plug heaters catalog sheet (English) Download

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About brand

Chromalox is an American manufacturer of electric process heating, heat trace and thermal control products. The company was founded in 1917 by Edwin L. Wiegand and, according to its website, is today part of Spirax Group. Its catalog spans immersion and circulation heaters, tubular and strip heaters, heat trace cables and controls, and temperature and power controllers.

Industrial heaters and heat trace

The industrial range covers screw plug and flanged immersion heaters, over-the-side heaters, air and radiant heaters, steam generators and packaged process heating systems. Heat trace products include constant wattage, self-regulating and mineral-insulated cables, with thermostats, controllers and connection kits for freeze protection and process temperature maintenance.

Controls and requesting a quote

Controllers run from single-loop temperature and process controllers to SCR power controllers and heat trace controllers. Seven Star LLC, an independent supplier in Muscat, lists selected Chromalox models for projects in Oman and the GCC. Send the full model code, voltage, kW or wattage and the fluid or application, and we will prepare a quotation from the Chromalox data sheet.