I. Preparation
1. Shutdown and Pressure Relief
Turn off the power to the equipment, drain any remaining starch slurry from the hydrocyclone, and ensure that the system pressure is zero.
2. Tools and Spare Parts
Prepare tools such as a wrench, screwdriver, rubber mallet, and cleaning cloth, and confirm that the new seal is the same model as the old one.
3. Safety Precautions
Wear protective gloves and goggles to avoid scratches and splashing of the medium during operation.
II. Removing the Old Seal
1. Removing the Gland
Loosen the gland bolts on the seal chamber, applying even force to avoid deformation. Note the bolt positions for reinstallation.
2. Removing the Old Seal
Use a specialized tool (such as a hook) to carefully remove the old seal, avoiding damage to the shaft or seal chamber surface.
3. Cleaning and Inspection
Remove any starch residue from the seal chamber and shaft. Inspect the shaft surface for scratches or wear, and repair if necessary. 3. Installing New Seals
1. Seal Pretreatment
Apply food-grade grease (such as silicone oil) to the sealing lip to reduce initial friction.
2. Installing the Dynamic/Stationary Rings
Slide the dynamic ring onto the shaft and press the static ring into the seal cavity, ensuring the sealing surfaces are perpendicular and without offset.
3. Tightening the Gland
Tighten the gland bolts evenly in a diagonal order to avoid uneven force on the seal.
4. Testing and Adjustment
1. Manual Turning
Manually rotate the shaft to confirm there is no binding or abnormal friction.
2. Trial Run
Start the equipment and observe for leaks. Minor leaks (30-60 drops/minute) are normal and can be resolved by fine-tuning the gland.
5. Maintenance Recommendations
Regular Inspection: Check seal wear every three months and replace any worn parts promptly.
Spare Parts Management: It is recommended to stock seals of the same model to avoid downtime.
