Complete Specifications of Sheathed Heaters
















 


Main Technical Parameters:


Rated Voltage:     Single-phase 220V    Three-phase 380V


Surface Heating Power:     ≤0.7W/cm² as design standard


Heat Transfer Temperature:     ≤300℃


Working Medium:     Mineral


Working Pressure:     ≤0.8MPa


Heater Installation Dimension:    φ81mm


Applications:


SRY6-2 sheathed electric heater is used for heating hydraulic and lubricating oil in hydraulic and lubrication systems, and can also be used for heating non-corrosive gases or liquids.


Complete Specifications of Sheathed Heaters


Features:


1. This electric heater consists of a heating core and a protective sheath. The heating core uses tubular electric heating elements as the heat source, and the protective sheath is made of thin stainless steel, which has a large heat dissipation area and fast heat transfer. The terminal connection part is divided into ordinary type (using iron-made drawn cup-shaped casing) and special type (using bolted explosion-proof casing seal). The special type meets the requirements of explosion-proof mark dIICT4 and protection level IP65 series standards.


2. The electric heater is connected to the oil tank body by flanges. The sheath isolates the heating core from the heated oil. When repairing the electric heater, there is no need to drain the oil from the tank; only the heating core needs to be extracted and replaced with a new one, making maintenance convenient.


3. During design, the contact area between the sheath and the heated oil should be considered to prevent local carbonization of the oil due to excessive heating temperature. This model of heater is only suitable for heating heat transfer oil or oils with good heat absorption effect, as well as for internal heating of media.



 Precautions:


1. The element is allowed to work under the following conditions:


A. Relative humidity of air not greater than 95%, with no explosive or corrosive gases. Except for explosion-proof heaters


B. Working voltage should not exceed 1.1 times the rated value, and the casing should be effectively grounded.


C. Insulation resistance ≥1MΩ; Dielectric strength: 2KV/1min.


2. The electric heating tube should be properly fixed and positioned. The effective heating zone must be completely immersed in liquid or solid metal. Dry burning is strictly prohibited. If scale or carbon deposits are found on the tube surface, they should be cleaned promptly before reuse to avoid affecting heat dissipation and shortening service life.


3. When heating fusible metals or solid nitrates, alkalis, asphalt, paraffin, etc., the operating voltage should be reduced first, and then raised to the rated voltage only after the medium has melted.


4. When heating air, the elements should be arranged crosswise and evenly to ensure good heat dissipation conditions and adequate heating of the flowing air.


5. When heating nitrates, safety measures should be considered to prevent explosion accidents.


6. The wiring part should be placed outside the insulation layer to avoid contact with corrosive, explosive media or moisture. The connecting wires should be able to withstand the temperature of the wiring part and the heating load for a long time. When tightening the wiring screws, avoid excessive force.


7. The element should be stored in a dry place. If the insulation resistance drops below 1MΩ due to long-term storage, it can be dried in an oven at about 200℃ or heated by applying reduced voltage until the insulation resistance is restored.


8. The magnesium oxide powder at the outlet end of the electric heating tube should be protected from pollutants and moisture infiltration to prevent leakage accidents.