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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.

 

 

 

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