产品特点：
1、本型号电加热器采用仿制德国产品制造而成，电加热器由加热芯子和护套管组成，加热芯子用管状电加热元件为热源，护套管采用薄型不锈钢管制成，接线装置保护采用螺栓式罩壳密封，防水、防潮、防油。
2、护套管与油箱体采用直管螺纹连接，密封性强，护套管将芯子与被加熱油隔离，在更換電加熱器時，不需要放掉油箱中的油液，只需抽出加熱器芯子即可，維修方便。
3，本型號電加熱器表面功率按JBT2379-93標準設計，其表面功率應選擇在≤0.7W/cm²。
注意事項：
尺寸圖中的尺寸B必須浸入油中燒毀。加熱油不得腐蝕。
SRY3型工作液位必須在緊固件下，上於尺寸線B之上。
熔化沥青、石蜡等固態油時，要降低電壓，用至熔化後再升至額定電壓，以防止集率降低元件的使用壽命。
使用前必須清除導道表面的結碳，以免降低效率，即使燒毀零件。
元件應存放在干燥之處。如果絕緣電阻因長期放置而降低到1兆歐姆以下，则可在200℃左右的烘箱中乾燥幾小時（或低壓通過幾小時），即絕緣電阻恢復。
材料：外護筒一般材質有In800, In840, 304, 316L, 310S, 鋁, 銅, 低碳鋼等。氧化鋁粉是根據不同的使用要求選擇不同規格，有高溫粉、中溫粉等。發熱丝為發熱件，其材質一般有兩種，一種為Ni-Cr丝，一種為Fe-Cr-Al.
工藝：
發熱片是在外護筒內（碳鋼護筒、鈦護筒、不鏽鋼護筒銅護筒）裝入發熱丝，並填滿具有良好導熱性和絶縱性的氧化鋁粉後縮合而成，再經過焊接或其他加工手段形成最終產品。此類產品具有結構簡單、高效能強度佳，可以適應恶劣環境的運行，并且適用於多種液體及酸鹼溶液的快速加溫，也適用於熔融金屬溶解。
注意事項：
1., 外形尺寸圖中尺寸“B必须全部浸入oil以免烧坏元件。被add heat oil应无腐蚀性.
2.. SRY3type work fluid surface must be below the tightened component and above the dimension line "B."
3.. When melting asphalt or wax type solid oils are used to reduce voltage during use until they melt before returning to rated voltage to prevent overheating from reducing component life.
4.. If carbon deposits are found on the heating tube surface after use, they must be removed before reuse to avoid reducing efficiency and burning out components.
5.. The heating element should be stored in a dry environment; if the insulation resistance decreases due to long-term storage and is less than 1 megohm Ωm), it can be dried in an oven at around 200°C for a few hours (or low-voltage current flow for several hours) to restore insulation resistance.
Product Profile: It has a compact structure and easy installation features that make it a common auxiliary heating device in industrial production.
Classification:
According to its structure:
A straight buried electric heater: This type of electric heater is directly embedded underground or against walls;
A flange-type electric heater: This type of electric heater connects with pipes on flanges;
A spiral winding-type electric heater: A metal wire wrapped around steel tubes as a heat source;
By usage temperature:
Low temperature types suitable for environments with temperatures ranging from -20 degrees Celsius
High temperature types suitable for temperatures higher than zero degrees Celsius
The product's unique characteristics include high thermal efficiency and durability under harsh conditions
