Heaters
R4 Finned tube heater (Type DHG)
Application
Ex finned tube heaters serve space heating air in hazardous areas. They are used mainly in petrochemical, chemical and pharmaceutical industries, oil and natural & LPG gas production and distribution as well as in paint and lacquer industries.
Design
A special ceramic element is fitted in a finned tube. It can be replaced via the attached flameproof casing. The heating elements are chosen in such a way that the temperature class T3 is not exceeded.
Temperature classes: T3 < 200°C
Type of protection
Explosion protection type “flameproof enclosure” and “increased EX safety”, II 2 G Ex de IIC T3.
Electrical connection
230VAC +6% at terminals U1, N and PE.
Nominal connection cross section 2,5mm². Cable gland M25x1,5 for cable diameters of 8 to 13mm.
| Type | Temp. class | Nominal power | Power consumption | Short-time initial current | L1 | L2 | Weight |
| DHG57A0/R4-0,5-T3 | T3 | 500 W | 360 W | 3,7 A | 765 mm | 600 mm | 12 kg |
| DHG57A0/R4-1-T3 | T3 | 1000 W | 780 W | 7,8 A | 1260 mm | 1095 mm | 18 kg |
| DHG57A0/R4-1,5-T3 | T3 | 1500 W | 1145 W | 11,0 A | 1865 mm | 1700 mm | 25 kg |
| DHG57A0/R4-2-T3 | T3 | 2000 W | 1525 W | 20,0 A | 2360 mm | 2195 mm | 30 kg |
TR5 thermostat (Type QTRKK)
Application
Room thermostat for wall mounting for simple controlling of room temperatures (i.e. antifreeze) in hazardous areas.
Design
In a casing made of impact resistant polyester a fixed set temperature regulator is mounted and embedded in pure mineral material. The sensor as well as the connecting cable are lead through screw couplings. Fix settings of +5, +10, and +15°C available (must be stated on order).
Type of protection
Ignition type “powder filling” II 2 G EEx q II T6 according to EN 50014-77 (VDE 0171). Protection type at least IP54 according to DIN 40050 resp. IEC 144. Protection class I according to DIN VDE 0106 part 1 and VDE 0631.
Certificate of conformity ZELM 02 ATEX 0077. Approved for all IIA, IIB and IIC hazardous areas.
Electrical connection
400VAC-16A resp. 250VDC-0,24A.
2 mtr. connecting cable H07 RN-F 3x1,5mm².
- TR5 thermostat (Type QTRKK)
- TR1 (QTREK)
TR1 (QTREK) temperature regulator
Application
The Ex-temperature regulator serves as an on-off controller to control room temperatures, medium (with an additional immersion pipe ) or surface temperatures within hazardous areas.
Design
In a casing made of impact resistant polyester a temperature regulator is installed and embedded in pure mineral material. The capillary as well as the electric wires are lead through screw couplings. The terminals are located in an EExe terminal box made of the same material.
Type of protection
Type of protection “powder filling” and “increased safety” II 2 G EEx qe II T6 according to EN 50014-77. Protection type at least IP54 according to EN 60529. Protection class I according to DIN VDE 0106 part 1 and VDE 0631.
Certificate of conformity ZELM 02 ATEX 0077. Approved for all IIA, IIB and IIC hazardous areas.
Electrical connection
Current rating 16A, 400VAC respectively 0,25A, 250VDC. Nominal cross section 2,5mm². Cable gland M20x1,5 for cable diameter 6 to 12mm + 1 plug M20.
| Type | Range of adjustment | Probe limit temperature | Probe length "L" | Probe and capillary material | Switching differential K |
| QTREK | -20...+50 °C | 75 °C | 200 mm | Copper | 2,5 |
| QTREK | 0...70 °C | 95 °C | 200 mm | Copper | 2,5 |
| QTREK | 0...100 °C | 125 °C | 150 mm | Copper | 2,5 |
| QTREK | 0...150 °C | 170 °C | 110 mm | Copper | 3,75 |
| QTREK | 0...190 °C | 230 °C | 90 mm | Copper | 5,0 |
| QTREK | 40...290 °C | 335 °C | 90 mm | Stainless steel | 7,5 |
Other products
- Flow heater
- Immersion heater
- Special electric heater
Flow heater
Direct heating of liquid or gaseous mediums like oil, water, process fluids, air, natural & LPG gas, technical gas applications, steam. In general built according clients specifications.
Immersion heater
Lube oil heater for turbines, compressors, pumps, heater for oil tanks, water and other liquids, motor anticondensation heaters etc.
Built in temperature limiter and regulator for protection of heating elements. Thread or flange connection, with heating bundle made of tubular heating elements, cartridge type heater with exchangeable heating inserts. Design according clients specifications possible.
Special electric heater
Contact heaters for heating of machinery and apparatus
Laboratory heating units
Complete heating systems or special solutions to customer’s requirements.
Gaspreheater
Indirect heating of gas (air, natural gas, fuel gas, technical gas applications, steam) liquids or vaporizer.
Tube coil and heating bundle cast in aluminium block for indirect heating. Safe operation without flow control.
Approved for natural gas applications.
Airheater
For installation in HVAC plants, in pipe systems, in ovens or heating chambers.
Documentation
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