SRY sheathed electric heater is an electric heating element with a three-layer coaxial structure of resistance wire, insulation, and sheath. It is suitable for heating media such as thermal oil, hydraulic oil, and lubricating oil. This product is installed in oil tanks or pipelines through threaded connection, featuring compact structure, high thermal efficiency, and long service life.
Model system: SRY series; Rated voltage: 220V/380V; Power range: 0.5kW～30kW; Sheath material: stainless steel 304/316L, carbon steel; Insulation material: high-purity magnesium oxide powder; Terminal box type: bolted flameproof terminal box, explosion-proof grade up to dⅡCT4; Installation method: threaded connection (such as G1", G1 1/2", etc.); Working temperature: ≤300℃; Applicable media: thermal oil, hydraulic oil, lubricating oil, water, etc.
1. Three-layer coaxial structure: the resistance wire is located in the center, surrounded by a magnesium oxide insulation layer, with a metal sheath on the outside, ensuring electrical insulation and mechanical strength.
2. Explosion-proof design: optional flameproof terminal box, suitable for explosive gas environments (Zone 1, Zone 2).
3. Threaded connection: easy to install and replace, with good sealing performance.
4. Fast thermal response: the sheath directly contacts the medium, resulting in high heat transfer efficiency.
5. Power, voltage, sheath material, and length can be customized according to requirements.
SRY sheathed electric heaters are widely used in industrial occasions such as hydraulic system oil tank heating, lubricating oil station heating, auxiliary heating of thermal oil boilers, chemical reactor heating, and asphalt tank heating. They are suitable for processes that require maintaining the medium within a specific temperature range.
During installation, ensure that the heating zone is fully immersed in the medium to avoid dry burning. Wiring should be connected correctly according to the nameplate voltage and reliably grounded. Regularly check insulation resistance and wiring terminals to ensure safe operation.
