Jacketed Kettle Instructions

1. **Applications and Characteristics of Jacketed Kettles**

- **Applications**:

- Widely used in food processing for heating, sterilization, and blending in candies, pastries, beverages, preserved fruits, canned goods, and sauces.

- Used in large restaurants and canteens for cooking soups, vegetables, meat, and porridge.

- Specific uses include:

- **Candy**: Melting, boiling, and blending sugar and syrup ingredients.

- **Pastry**: Precise temperature control for frying.

- **Beverages**: Used in sugar refining systems and for tea infusion.

- **Preserved Fruits**: Pre-cooking and sugar boiling.

- **Canned Foods**: Pre-cooking and ingredient mixing.

- **Sauces**: Blending and sterilizing various sauces.

- Features include large heating surface, high thermal efficiency, uniform heating, short boiling time, and easy temperature control.

- **Electric-Heated Jacketed Kettles**:

- Operates on 380V electricity with an inner jacket containing electric heating rods and thermal oil.

- Maximum temperature: 150°C (compared to 121°C for steam-heated kettles).

- Features include large heating area, high thermal efficiency, uniform heating, and easy temperature control.

2. **Basic Structure and Installation**

- **Structure**:

- Fixed (vertical) kettles: Kettle body and legs.

- Fixed kettles with agitator: Kettle body, legs, and agitator.

- Tilting kettles: Kettle body and tilting mechanism.

- Tilting kettles with agitator: Kettle body and tilting mechanism.

- **Installation Notes**:

- Tighten set screws on the support frame; ensure air and water pipes do not rotate with the kettle.

- Perform an idle test run before production.

- Address steam leakage by tightening nuts.

3. **Usage Precautions**

- Steam pressure must not exceed the rated working pressure.

- Open the steam inlet valve slowly to reach the required pressure.

- Adjust the safety valve based on desired steam pressure.

- Drain accumulated water after stopping steam supply.

- Oil all rotating parts before each shift; use appropriate oil types.

- Do not block the air vent during operation.

- For cooling, connect a water hose to the drain valve.

4. **Maintenance**

- Tighten or replace packing if oil inlet/outlet pipe joints leak.

- Regularly check the pressure gauge and safety valve.

- Change lubricating oil after 50 hours, then every 1,000 hours.

- Repaint if anti-rust paint deteriorates; use recommended paint for the exterior.

- Conduct a safety hydrostatic test every 5 years.

- Discontinue use if the outer pot thickness is less than 2 mm due to rust.

- Use stainless steel welding rods for repairs.

- Stirring mechanisms include conventional and scraped edge stirring (made of polytetrafluoroethylene).