IMMERSION
HEATERS


EHK

 
Grelci Maras d.o.o.
Jevčeva pot 2,
1351 Brezovica pri Ljubljani,
Slovenia
+386 (01) 365 3 518 | info@grelci-maras.si
 

USE


Immersion heaters EHK are heating elements designed to heat liquids, gases, and oils directly
EHK immersion heaters are robust, high-performance heating elements designed for industrial applications that require efficient and precise temperature control.

These heaters are typically equipped with enhanced safety features and built from durable materials to handle extreme conditions.

Application areas:
Chemical processing, Food and Beverag production, Oil and Gas insutry

Send inquiry
 
 

ADVANTAGES
 

  • Durable Construction: Built with corrosion-resistant materials to withstand harsh environments
  • Temperature Precision: Advanced control features to maintain stable temperatures
  • Customization: Available in different shapes, sizes, and power ratings to meet specific application needs.
  • Energy Efficiency: Direct heating of liquids ensures minimal heat loss, optimizing energy use.



 



   
 

Immersion heaters EHK

Immersion heater
Heater with limitor
Heater with thermostat
Immersion heater


 

TYPES



 

IPOO  Threaded nipple from stainless steel 1.4301 (AISI 304)S


 
 
 
 

Heaters with limitor


Immersion heaters with limitor can be supplied with the maximum allowable temperature adjusted between 0° and 300°C. The sensor of the limitor is located in a protective tube. If the limitor is activated the cause of the failure must be detected and the limitor has to be reset manually. The electrical connection can be made in the same way as for the thermostats.
 
 
 
 

Heaters with thermostat


EHK immersion heaters G 11⁄2 with thermostat are supplied with the electrical connection ready for use. The temperature can be adjusted optionallyfrom 30° to 110°C or from 50° to 300°C. The sensor of the thermostat is located in a protective tube which is assembled in between the heaters and senses the temperature of the liquid. The single-phase or three-phase thermostats are infinitely variable from outside of the housing within the respective temperature range.
Upto a performance of 3000 W the heaters can be wired to 230 V single phase current (parallel connection)  For higher performances than 3000 W/230 V the heaters generally must be connected with a relay.
 
 
 



 


 

INFORMATIONS



   
Standard Voltage:
 
230V, 400V
 
Thread:
 
G 1 1/2
 
Sheath material:
 
Stainles steel 1.4435 (AISI316 L)
 
Protection cap:
 
YES ( IP41, IP64)
 
Max Watt densty:
 
9 W/cmm2
 
Thermostat:
 
As option
 
Heating conductor:
 
Nickel-Chrom 80/20
 
Limitor:
 
As option
 
EHK standard dimensions
Articel Nr. Immersion lenght (mm) Power for 230V (W) Surface load (W/cm2)
105190 170 750 2 - 3
105191 240 1000
105192 480 1500
105193 600 2000
105194 880 3000
105195 170 1000 4 - 5
105196 240 1500
105197 480 3000
105198 600 4500
105199 880 6000
105200 170 2500 8 - 9
105201 240 3000
105202 480 6000
105203 600 7500
105204 880 10000
Description Code
Protection IP 41 Whitout thermostat 120800
Whitout thermostat 120801
With limitor 120802
Protection IP 64 Whitout thermostat 120803
Whitout thermostat 120804
With limitor 120805
Thermostat
Single-phase 30 - 110°C 120810
Single-phase 50 - 300°C 120811
3-phase 30 - 110°C 120812
3-phase 50 - 300°C 120813
Single-phase 0 - 100°C adjustable inside 120815
Single-phase 50 - 320°C adjustable inside 120816
3-phase 50 - 300°C adjustable inside 120817
Limitor single-phase 0 - 100°C 120819
Limitor single-phase 70 - 300°C 120814
Fixation elements and seals
Hexagonal nut G1 1/2 SW 60  Brass 600157
Hexagonal nut G1 1/2 SW 60  Chrome steel 600158
Copper mineral gasket  48x54x2 mm 600431
 
The assembly of the heater can be made onto a container with a wall thickness of at least 10 mm by a threaded hole G 1 1⁄2. The hole needs to be chamfered 2.5 x 45° on the assembly side so  that the nipple can easily be mounted.  For the assembly onto containers with a wall thickness less than 10 mm it is necessary to use G1 1⁄2 nut. Counter nut or seal can be supplied separately.
 
 
Preheating of oil to ensure efficient lubrication

Prepairing hot water
 
 
The voltage of the tubular heaters is of 230 V Immersion heaters without thermostat are generally equipped for use with three phase supply 400 V  (star connection). They can easily be switched to  230 V parallel connection.
 
 
Three phase supply 400V
Star connection

Parallel connection 230V
 

Three phase supply 400 V
Star connection with thermostat and relay

Three phase supply 230V
Delta connection
 
 
The power required to heat the mass of a medium  is calculated as follows:

 
Calculation formula


P = power in Watt
m = mass in kg
c = specific heat in Wh/kg K
ΔT = temperature difference in Kelvin
Δt = heating up time in hours

In applications with high material flow, the power should be calculated by using the mass per hour, in kg/h instead of the mass and heating up time. Material properties for the calculation see bottom of the page
  Heat losses

To compensate heat losses, the power should be increased  by:
for non-insulated containers 20% to 30%
for insulated containers 10% to 20%
Heat losses for open containers by vaporization
Water temperature Loss per m2 of water surface in kW/h

40˚C 0,6
60˚C 2,8
80˚C 7,0
95˚C 15,0

 

For the melting or the vaporization of a medium the melting  or vaporization heat in Wh/kg has to be added to the calculation indicated beside. By using equipment with a thermostat, the power of the heater may be two times higher than calculated.
 
Substances Density kg/dm3 Melting temp.  Wh/kg K Melting temp. °K Melting heat Wh/kg Boiling point  °K Vaporization Heat Wh/kg
Water 1 1,162 273 92,66 373 626,66
Air 0,0013 0,279    53 - 82 -
Parafin 0,9           0,908 325 573 -
Heating oil 0,83    0,58 263 - ~450 ~160
Alcohol 0,77        1,163 195 27,9  240  380,17



 
close On Maras.si we use cookies in order to provide online services,
advertising systems and functionality that we would not be able
to provide without them.

By continuing to use our websites, you agree to the use of cookies.
If you do not want cookies, you can disable them in the settings.
OK