GYY4GYY Type Tubular Electric Heater
This product is suitable for heating air, oil, water, chemical media, hot pressing molds, melting salts, alkalis, and low-melting-point alloys. It features high thermal efficiency, long service life, high mechanical strength, easy installation, safety, and reliability.
Product Structure:
It is made by placing electric heating wires inside an outer tube (carbon steel tube, titanium tube, stainless steel tube, copper tube), filling the gaps with magnesium oxide powder that has good thermal conductivity and insulation, then shrinking the tube. After heat treatment (not required for some tubes), it is processed into various shapes as needed by the user. It has a simple structure, high thermal efficiency, good mechanical strength, and good adaptability to harsh environments. It can be used for heating various liquids, acids, alkalis, and salts, as well as for melting low-melting-point metals.
Heater application range: Suitable for heating air, oil, water, chemical media, hot pressing molds, melting salts, alkalis, and low-melting-point alloys. It features high thermal efficiency, long service life, high mechanical strength, easy installation, safety, and reliability.
Product Specifications:
A B Immersion length in oil C
SRY2-220/1 220 1 307 230 " 1.45
SRY2-220/2 220 2 507 430 " 1.90
SRY2-220/3 220 3 707 630 " 2.35
SRY2-220/4 220 4 922 845 " 2.83
Product Materials:
Common outer tube materials include In800, In840, 304, 316L, 310S, aluminum, copper, low-carbon steel, etc.
Magnesium oxide powder is selected according to different usage requirements, including high-temperature powder, medium-temperature powder, etc.
The resistance wire serves as the heating element, and there are generally two types of materials: Ni-Cr wire and Fe-Cr-Al wire.
Lead terminal materials generally have two types: stainless steel and free-cutting iron.
Sealing materials include epoxy, silicone, glass, etc.
Product Introduction:
Working voltage tolerance: not greater than 1.1 times the rated value; the shell must be effectively grounded.
Working environment: relative humidity not greater than 95%, no explosive or corrosive gases.
In the outline drawing, "B" must be fully immersed in oil (and checked regularly) to avoid burning; the heated oil should be non-corrosive. When melting solid oils such as asphalt and paraffin, the voltage should be reduced until melting, then raised to the rated voltage.
To prevent heat concentration and reduce the service life of the element, keep the outlet end dry and clean to avoid surface flashover or short circuit. 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°C for several hours (or the element can be powered at low voltage for several hours) to restore the insulation resistance.
