Explosion-proof heatersRIZUR-OUR-PL
Explosion-proof heaters RIZUR-OShA-R are designed for heating and temperature maintenance in the enclosures, insulation jackets, block-boxes, and instrumentation rooms with equipment that requires specific temperature for stable and reliable service. Heaters RIZUR-OUR and RIZUR-OUR-PL for EC&I equipment are designed for the heating of the instrumentation that has condensation of moisture in the form of frost or ice appear inside at negative temperatures preventing the successful operation of the EC&I equipment, electronic devices, and LCD-elements.
Explosion-proof heaters RIZUR-ONP can be used for oil heating at the exit out of the well in the winter season, as well as for local heating of the freezing parts of the industrial pipelines, e.g. in the places of Xmas needle valves, pipe valves, etc. used in fuel-power complexes, oil, gas, chemical, and other branches of the industry. Thanks to the quality design and multilayer testing during the manufacturing process, including run-to-failure tests, explosion-proof heaters RIZUR-OShA-R, RIZUR-OUR, RIZUR-OUR-PL, RIZUR-ONP manufactured by OOO "NPO RIZUR" are defined by reliably stable operation and the absence of failures in the field conditions.
are marked according to the manufacturer’s reference and the emergency shut-off temperature: 1ExmbIICT3...T6GbX.
According to Ex-marking, Ch. 7.3 of Electrical installation code (PUE) and other relevant regulations, these heaters can be operated in explosion hazardous areas at indoor and outdoor facilities.
Design variants of the explosion-proof heaters RIZUR-OUR-PL, and RIZUR-ONP: F, FT, S, ST, SR, AR
Installation scheme for heaters OUR
Heaters OUR-PL
Design description and functions
In terms of design, the heater consists of a radiant heater - two plates made of aluminum alloy with powder-polymer coating and an electric heating element placed between them.Explosion protection is provided by sealing the electric heater and other electric components in the metal housing with a sealing compound. The minimum thickness of the compound layer between electric elements and the housing should be no less than 1 mm. The minimum thickness of the compound layer between the electrical elements and the outer surface is no less than 3 mm.
Protection from the surface overheating is ensured by the external surface area that matches the nominal heat capacity, and (additionally) by placing a temperature sensor (bimetallic or digital - depending on the design variant) to switch off at a set maximum temperature.
To prevent pulling and disconnection of the power cable, the cable gland is sealed and has a lock.
Technical specifications
| Parameter | RIZUR® ONP-X-F | RIZUR® OUR-PL-X-A/S |
| Explosion protection marking |
1ExmbIICT3GbX...T6GbX |
|
| Heating element power | 40 … 1000 W | 40 … 1000 W |
| Temperature maintainde inside tnom | 18±3 °C | +1…49°C (an increment of 1°C) |
| Temperature on the heater's surface | 135 °C | +20°C ... +80°C (an increment of 1°C) |
| Insulation resistance | min. 20 MOhm | min. 20 MOhm |
| Supply voltage | 220V±10-15% | 220V±10-15% |
| Ingress protection | min. IP54 | min. IP54 |
| Electric strength of the insulation | min. 1500 V | min. 1500 V |
| Relative humidity | 95% at +25 °С | +25 °С without water condencation |
|
Protection against electrical shock |
.. class 1 acc. to GOST 12.2.007.0. | .. class 1 acc. to GOST 12.2.007.0. |
Dimensional specifications of the OUR and ONP heaters
| Design variant | Nominal capacity, W | Resistance of the heater element's circuit, Om | Dimensions, mm | Notes |
|
RIZUR® OUR-1-Х |
75 | 650 ± 10% | 120 х 90 х 50 |
Arcuate for the 60mm tube |
| RIZUR® OUR-2-Х | 40 | 1235 ± 10% | 120 х 60 х 30 |
Arcuate for the 80mm tube |
| RIZUR® OUR-3-Х | 75 | 650 ± 10% | 120 х 90 х 60 |
Arcuate for the 42mm tube |
| RIZUR® OUR-PL-1-Х | 60 | 810 ± 10% | 120 х 120 х 32 | Flat |
| RIZUR® OUR-PL-2-Х | 100 | 494 ± 10% | 120 х 220 х 32 |
Flat |
| RIZUR® OUR-PL-3-Х | 75 | 650 ± 10% | 140 х 140 х 32 |
Flat |
| RIZUR® OUR-PL-4-Х | 150 | 320 ± 10% | 220 х 220 х 32 |
Flat |
| RIZUR® ONP-1-Х | 500 | 97 ± 10% | 300 х 140 х 80 |
Arcuate for the 89mm tube |
| RIZUR® ONP-2-Х | 1000 | 48 ± 10% | 580 х 140 х 80 |
Arcuate for the 89mm tube |
| RIZUR® ONP-3-Х | 500 | 97 ± 10% | 300 х 150 х 85 |
Arcuate for the 100mm tube |
| RIZUR® ONP-4-Х | 1000 | 48 ± 10% | 580 х 150 х 85 |
Arcuate for the 100mm tube |
*Х – for the design variant of the heater
| Model | Drawing |
| OUR-PL-1 |
|
| OUR-PL-2 |
|
| OUR-PL-3 |
|
| OUR-PL-4 |
|
