SRY3 Tubular Electric Heater Detailed Information


I. Purpose
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
 




















































































































Model


FL2



Voltage
(V)



Power


(kW)



Dimensions and Installation Dimensions (mm)



Weight


(kg)



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



SRY3-220/1



220



1



625



375



570



0.77



SRY3-220/2



220



2



825



575



770



1.01



SRY3-220/3



220



3



925



675



870



1.13



SRY3-220/4



220



4



1125



875



1070



1.37



SRY4-220/5



220



5



697



620



"



2.45


SRY4-220/62206807730"2.70
SRY4-220/822081007930"3.05

Note: The mounting hole for SRY2 and SRY4 models is Ø72 mm
2. Working voltage tolerance: not greater than 1.1 times the rated value, the shell should 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 models is less than 2 kg/cm².
7. The length of the fastener for SRY3 model 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. The working liquid level for SRY3 model must be below the fastener and above the dimension line "B".
3. When melting solid oils such as asphalt or paraffin, reduce the voltage until they melt, then increase to rated voltage to prevent heat concentration and reduce element lifespan.
4. If carbon deposits are found on the tube surface, remove them thoroughly before reuse to avoid reduced efficiency or even element burnout.
5. Store the 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.