Publish Time: 2026-02-26 Origin: Site
However, in practical applications, irregular installation operations and inadequate daily maintenance are likely to cause cartridge mechanical seals to experience faults such as leakage, overheating and wear, affecting the normal operation of equipment. This article presents the core operations and fault handling logic in a tabular form, details the installation process, maintenance points and common fault solutions of cartridge mechanical seals, provides objective and clear professional references for industrial equipment operation and maintenance personnel, helps improve the operational reliability of cartridge mechanical seals and reduce equipment downtime losses.
| Installation Stage | Core Operation Content | Key Precautions |
| Pre-installation Preparation | 1. Check the integrity of all components of the cartridge mechanical seal and verify the model and specification; 2. Clean the oil stains, rust and impurities on the surface of the equipment seal chamber and shaft diameter; 3. Prepare special installation tools and check the adaptability of shaft diameter runout and seal chamber size | Do not use damaged or scratched sealing components; the surface roughness of the shaft diameter must meet the installation requirements to avoid residual impurities |
| On-site Installation Steps | 1. Align the seal seat with the seal chamber, evenly tighten the fasteners to ensure coaxiality; 2. Slowly push the rotating ring assembly in to avoid colliding with the seal face; 3. Install the compensation spring to ensure uniform force and no jamming; 4. Embed the seal ring, apply medium-compatible lubricant to avoid distortion; 5. Install the protective cover and manually rotate the rotor to check the operation status | Handle with care throughout the process, and it is strictly prohibited to strike the seal face; the installation direction of the spring must comply with the design specifications, and the rotor rotation must be free of jamming and abnormal noise |
| Post-installation Debugging | 1. Run idly for 10-15 minutes to monitor temperature, leakage and vibration; 2. Gradually load for load debugging and continuously record operating parameters; 3. Put into formal operation only after confirming no abnormalities | The normal operating temperature shall not exceed 80℃; there shall be no obvious visible leakage; if abnormalities occur, shut down the machine immediately for inspection and prohibit operation with faults |
It should be noted that the operation specifications must be maintained throughout the installation process, focusing on protecting the seal face from damage, ensuring that all components are properly adapted, and putting into use only after passing the debugging. This is the foundation for ensuring the long-term stable operation of cartridge mechanical seals.
| Maintenance Category | Core Implementation Content | Implementation Frequency | Maintenance Purpose |
| Regular Inspection and Monitoring | 1. Record the temperature change of the seal face; 2. Observe the leakage at the seal part; 3. Check the equipment vibration parameters to avoid abnormal vibration | 1-2 times a day for continuously operating equipment; once each before startup, during operation and after shutdown for intermittently operating equipment | Timely detect temperature abnormalities, leakage hidden dangers and vibration problems, and avoid faults in advance |
| Cleaning Maintenance | 1. Clean the oil stains and impurities around the seal face and seal seat; 2. Remove the residual medium in the seal chamber to prevent crystallization and blockage; 3. Select medium-compatible cleaning agents to avoid corrosion of sealing components | Once a week under normal working conditions; once a day under working conditions with particles and high viscosity medium | Prevent impurities from entering the seal gap, reduce wear of the seal face and avoid component blockage |
| Replacement of Wear Parts | 1. Regularly check the aging and damage of seal rings and gaskets; 2. Select parts of the original model and material for replacement; 3. Re-debug after replacement to confirm the sealing performance | Once every 6-12 months under normal working conditions; shorten the cycle as needed under strong corrosion and high temperature working conditions | Avoid seal failure caused by aging of wear parts and ensure the integrity of the seal system |
| Auxiliary System Maintenance | 1. Check the filtration accuracy of the flushing system and the cleanliness of the flushing fluid; 2. Verify the operation status of the cooling system to ensure the cooling effect; 3. Supplement the lubricant of the lubrication system to prevent deterioration | A comprehensive inspection once a week; spot check the operation status of core components every day | Provide a good operating environment for cartridge mechanical seals and reduce friction and high-temperature damage |
The core principle of daily maintenance is "prevention first and timely inspection". By mastering the operation status of cartridge mechanical seals through regular inspections and conducting targeted cleaning, replacement and auxiliary system maintenance, their service life can be effectively extended and maintenance costs can be reduced.
| Fault Type | Typical Phenomenon | Core Cause | Handling Method |
| Leakage | Dripping or seepage occurs at the seal part, which seriously affects the equipment operation | 1. The seal face is damaged during installation; 2. The seal ring is aging or damaged; 3. The compensation spring is stuck or unevenly stressed; 4. The shaft diameter is worn or elliptical; 5. The operating conditions exceed the applicable range | 1. Slight wear of the seal face can be repaired by grinding; replace the rotating ring and stationary ring if severely worn; 2. Directly replace the compatible seal ring; 3. Adjust or replace the compensation spring; 4. Repair or replace the equipment shaft diameter; 5. Adjust the operating parameters or replace the suitable cartridge mechanical seals |
| Overheating | The temperature of the seal face continues to rise, exceeding 80℃, accompanied by signs of aging of the sealing components | 1. Insufficient lubrication of the seal face; 2. The seal face is too tightly fitted, resulting in large frictional resistance; 3. Impurities enter the seal face causing abnormal friction; 4. Failure of the cooling system; 5. Excessive equipment vibration | 1. Supplement medium-compatible lubricant; 2. Adjust the installation position to reduce the fitting pressure of the seal face; 3. Thoroughly clean the seal face and seal chamber impurities; 4. Repair or replace the cooling system components; 5. Adjust the equipment vibration parameters and reinforce the equipment foundation |
| Wear | Scratches and pitting occur on the seal faces of the rotating ring and stationary ring, resulting in decreased sealing performance | 1. Residual impurities on the seal face cause long-term friction; 2. The medium is corrosive and abrasive; 3. The seal face is damaged during installation but not handled; 4. Inadequate daily cleaning and maintenance; 5. Abnormal wear caused by equipment vibration | 1. Slight wear can be repaired by grinding; replace damaged parts if severely worn; 2. Optimize the medium treatment process and select wear-resistant material sealing components; 3. Strictly check the status of the seal face before installation; 4. Strengthen daily cleaning and increase maintenance frequency; 5. Adjust the equipment vibration parameters to reduce vibration impact |
| Jamming | The equipment rotor is difficult to rotate, even cannot start, accompanied by abnormal noise | 1. The compensation spring is stuck; 2. The sealing component is deformed or damaged; 3. Impurities block the seal chamber or gap; 4. Excessive installation deviation causes component interference; 5. The seal specification is not compatible with the equipment | 1. Clean the impurities around the spring; replace it if severely stuck; 2. Replace the deformed and damaged sealing components; 3. Thoroughly clean the seal chamber and gap impurities; 4. Reinstall and adjust the position to eliminate component interference; 5. Replace the cartridge mechanical seals compatible with the equipment |
When handling faults, it is necessary to shut down the machine for inspection first, and take corresponding measures after clarifying the cause of the fault, so as to avoid further damage to the sealing components caused by blind operation; after the fault is handled, it is necessary to re-debug to confirm that the cartridge mechanical seals are operating normally before putting them into the normal operation of the equipment.
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