| I. Application of SRY2 Tubular Electric Heater SRY2 and SRY3 Tubular Electric Heaters are used for heating oil in open or closed oil tanks. SRY4 Tubular Electric Heater is used for heating flowing or circulating oil. II. Specifications and Technical Data 1. Specifications and Dimensions: See Table and Figure 2
Note: The mounting hole for SRY2 and SRY4 is Ø72 mm. 2. Working voltage tolerance: not exceeding 1.1 times the rated value; the shell must be effectively grounded. 3. Working environment: relative humidity not greater than 95%, no explosive or corrosive gases. 4. Metal tube material: No. 10 steel. 5. Maximum working temperature: SRY2 and SRY3 are 300°C, SRY4 is 100°C. 6. Working pressure for SRY2 and SRY4 is less than 2 kg/cm². 7. The length of the fastener for SRY3 is 25 mm. III. Usage, Maintenance, and Precautions 1. Dimension "B" in the outline drawing must be fully immersed in oil to avoid damaging the element. The heated oil should be non-corrosive. 2. For SRY3, the working liquid level must be below the fastener and above the dimension line "B". 3. When melting solid oils such as asphalt or paraffin, reduce the voltage; after melting, increase to rated voltage to prevent heat concentration and reduce element life. 4. If carbon deposits are found on the tube surface, remove them before reuse to avoid reduced efficiency or even element burnout. 5. Store elements in a dry place. If insulation resistance drops below 1 MΩ due to long-term storage, dry in an oven at about 200°C for several hours (or apply low voltage for several hours) to restore insulation resistance.  | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
