Installation Precautions for Mechanical Seal

1. Ensure the shaft surface finish meets requirements (Ra 0.2-0.4μm) and no scratches, burrs or corrosion exist before installation.

2. Clean all seal components (stationary ring, rotating ring, spring, O-ring) with clean solvent; avoid dust, impurities or oil residue.

3. Check the perpendicularity of seal chamber end face to shaft (tolerance ≤0.05mm) and coaxiality of shaft (runout ≤0.03mm) strictly.

4. Apply appropriate food-grade lubricant to O-rings and sliding surfaces for smooth assembly; do not use lubricant containing particles.

5. Install stationary ring and rotating ring carefully, avoid collision or deformation; ensure the sealing faces fit tightly without tilting.

6. Adjust spring compression amount accurately according to technical drawing; over-compression or under-compression will cause seal failure.

7. Keep the installation direction of spring consistent; ensure no jamming during shaft rotation.

8. After assembly, rotate the shaft manually for 3-5 circles to confirm flexible rotation without stuck or abnormal noise.

9. Vent the seal chamber completely before startup to avoid air locking; ensure full medium filling in the sealing system.

10. Run the equipment at low speed first for 10-15 minutes, check for leakage, temperature rise and abnormal vibration before normal operation.

11. Avoid dry running of mechanical seal; ensure sufficient lubrication and cooling during operation.

12. Do not hit the seal components with hard tools during installation to prevent damage to sealing faces.