Jiaxing Burgmann Mechanical Seal Co., Ltd. Jiashan King Kong Branch

Preventing mechanical seal failure centers on controlling operating conditions, ensuring proper installation, and conducting proactive maintenance. Core Prevention Measures 1. Stabilize Operating Conditions - Keep pressure, temperature, and rotational speed strictly within the seal’s design limits to avoid thermal deformation or excessive wear. - Prevent dry running: Ensure continuous, clean fluid supply for lubrication and cooling (install low-flow alarms if needed). - Minimize pressure surges or fluctuations with buffer systems (e.g., pressure regulators) to avoid seal face separation. 2. Ensure Fluid Cleanliness & Compatibility - Install high-efficiency filters (to remove particles ≤25μm) to prevent abrasive wear on seal faces. - Verify fluid compatibility with seal materials (e.g., avoid corrosive fluids with non-resistant elastomers like nitrile). - Maintain proper fluid viscosity; avoid overly thin or thick fluids that reduce lubrication. 3. Follow Proper Installation Procedures - Adhere to the manufacturer’s guidelines: Ensure correct alignment of the seal, shaft, and housing (misalignment causes uneven wear). - Use specified torque values for fasteners—over-tightening damages seal faces, while under-tightening leads to leaks. - Keep seal components clean and free of scratches during installation (even small defects on seal faces cause leaks). 4. Implement Proactive Maintenance - Conduct daily visual checks for leaks, abnormal noises, or temperature rises. - Perform scheduled inspections (per manufacturer recommendations or operating conditions) to replace worn parts (e.g., O-rings, springs) before failure. - Replace aging components proactively—elastomers degrade over time even without obvious damage. 5. Address Abnormalities Promptly - Shut down equipment immediately if dry running, severe vibration, or sudden temperature spikes occur. - Investigate and resolve root causes (e.g., clogged filters, fluid contamination) instead of temporary fixes. 6. Select the Right Seal - Choose a seal model matched to the application (e.g., high-temperature seals for hot fluids, corrosion-resistant seals for acidic media) to avoid mismatched performance.   Jiaxing Burgmann Mechanical Seal Co., Ltd Email: doris@mechanicalseal.com.cn Skype: kathysunlin Fax: 86-573-84072317 Mob: 86-15381220188 WhatsApp: 8615958372402 Website: www.industrial-mechanicalseals.com Add: A-5 Wanyangzhongchuangcheng, Ganyao Town, Jiashan county, Jiaxing, Zhejiang, China. 314107

The core signs of mechanical seal failure are visible leaks and abnormal equipment performance. Key Failure Signs 1. Leakage - Obvious dripping or streaming of fluid from the seal area (exceeds the normal acceptable rate, usually >5 droplets per minute). - Accumulation of fluid or stains around the seal and adjacent components. 2. Abnormal Sounds/Vibrations - Unusual grinding, squealing, or rattling noises from the seal region, indicating worn or misaligned seal faces. - Increased equipment vibration, often caused by seal damage leading to unstable operation. 3. Elevated Temperature - Higher-than-normal temperature at the seal housing, resulting from insufficient lubrication, dry running, or excessive friction between seal faces. 4. Reduced Equipment Efficiency - Drop in pump pressure, flow rate, or compressor output, as seal leakage affects system performance. - Increased energy consumption due to the seal’s increased resistance. 5. Visual Damage - Visible wear, scratches, or cracks on the seal faces when inspected after disassembly. - Deterioration (swelling, hardening, or tearing) of elastomeric components like O-rings or gaskets.   Jiaxing Burgmann Mechanical Seal Co., Ltd Email: doris@mechanicalseal.com.cn Skype: kathysunlin Fax: 86-573-84072317 Mob: 86-15381220188 WhatsApp: 8615958372402 Website: www.industrial-mechanicalseals.com Add: A-5 Wanyangzhongchuangcheng, Ganyao Town, Jiashan county, Jiaxing, Zhejiang, China. 314107

Mechanical seal replacement frequency depends on operating conditions, seal type, and application, with no fixed universal interval. General Replacement Guidelines 1. Based on Operating Hours - Under ideal conditions (stable parameters, clean/compatible fluids): 10,000–20,000 operating hours (roughly 1–2 years for continuous operation). - Under harsh conditions (high temp/pressure, abrasive/corrosive fluids, frequent start-stops): 1,000–5,000 operating hours (may need replacement every 3–6 months). 2. Based on Condition Monitoring - Replace immediately if failure signs appear (e.g., excessive leakage, abnormal noise, elevated temperature). - Proactively replace during scheduled equipment overhauls if seals show wear (e.g., scratched faces, degraded O-rings) even if no obvious failure. 3. Manufacturer’s Recommendations - Prioritize the seal manufacturer’s guidelines, as they specify intervals tailored to the seal’s design, materials, and intended use. 4. Preventive Replacement - For critical equipment (where unexpected failure causes heavy losses), replace seals before reaching their maximum service life—e.g., at 70–80% of the recommended operating hours.   Jiaxing Burgmann Mechanical Seal Co., Ltd Email: doris@mechanicalseal.com.cn Skype: kathysunlin Fax: 86-573-84072317 Mob: 86-15381220188 WhatsApp: 8615958372402 Website: www.industrial-mechanicalseals.com Add: A-5 Wanyangzhongchuangcheng, Ganyao Town, Jiashan county, Jiaxing, Zhejiang, China. 314107  

Proper maintenance of mechanical seals focuses on proactive monitoring, timely interventions, and adherence to operational limits—all to prevent premature wear, leakage, and unexpected failure. Below is a structured approach to maintain seal performance: 1. Implement Regular Operational Monitoring Consistent checks help detect early warning signs before they escalate into major issues. - Leakage Inspection: Check for visible leakage (drops or streams) around the seal. A tiny, intermittent film (≤5 drops/hour for non-hazardous fluids) is normal; excessive or continuous leakage indicates seal face damage or misalignment. - Temperature Monitoring: Use an infrared thermometer to measure the seal face temperature. For standard seals, temperatures exceeding 80°C often signal friction issues (e.g., dry running, misalignment) and require immediate inspection. - Vibration & Noise Checks: Unusual vibrations (felt via touch) or grinding noises suggest seal binding, worn components, or shaft misalignment. Compare readings to baseline levels (taken when the seal is new) for early anomaly detection. 2. Maintain Optimal Operating Conditions Avoid operating the seal outside its rated parameters, as this is a leading cause of accelerated wear. - Control Fluid Parameters: Ensure the sealed fluid’s temperature, pressure, and viscosity stay within the seal’s design limits. For example: - Use coolers/heaters to prevent overheating or freezing of the fluid. - Install filters to remove solids (particle size >50μm can scratch seal faces) from the fluid. - Prevent Dry Running: Never start the equipment if the seal chamber is empty. Dry running (no fluid lubrication between seal faces) causes instantaneous damage—always prime the system first. - Stabilize Shaft Speed: Avoid rapid speed fluctuations (e.g., sudden startups/shutdowns). Gradual acceleration/deceleration reduces stress on the seal’s springs and elastomers. 3. Perform Scheduled Preventive Maintenance Follow a routine maintenance plan based on the seal’s lifespan (typically 1–3 years, depending on usage) and manufacturer guidelines. - Periodic Disassembly & Inspection: Every 6–12 months (or as recommended), disassemble the seal to check: - Seal faces: Look for scratches, cracks, or uneven wear (replace if damaged). - Elastomers (O-rings, gaskets): Check for swelling, hardening, or tearing (replace annually, even if undamaged, as they degrade over time). - Springs & metal components: Ensure no corrosion, deformation, or breakage. - Clean & Lubricate: After inspection, clean all components with a compatible solvent (non-corrosive to seal materials). Lubricate elastomers and sliding parts with a fluid-compatible grease (e.g., silicone grease for PTFE O-rings) before reassembly. - Recheck Alignment: After reassembly, verify shaft coaxiality and seal face parallelism using a dial indicator—misalignment from disassembly can cause rapid wear. 4. Address Issues Promptly Delay in fixing minor problems leads to costly seal failure and equipment damage. - Immediate Action for Leakage: If leakage exceeds the acceptable limit, stop the equipment and inspect: - Loose gland bolts (retighten in a crisscross pattern with a torque wrench). - Damaged seal faces (replace if scratched or cracked). - Clogged fluid channels (clean to restore lubrication). - Replace Worn Components: Never reuse worn parts (e.g., scratched seal faces, hardened O-rings). Use manufacturer-approved replacement parts to ensure compatibility—generic parts often don’t match the seal’s design tolerances. 5. Document & Optimize Maintenance Record-keeping helps identify patterns and improve maintenance efficiency. - Maintain a Maintenance Log: Track inspection dates, findings, replacements, and operating parameters (temperature, pressure, RPM). This helps predict when components will fail and adjust maintenance schedules. - Analyze Failures: When a seal fails, investigate the root cause (e.g., chemical incompatibility, dry running) and update maintenance practices—for example, if seals fail due to solids in the fluid, install a finer filter.   Jiaxing Burgmann Mechanical Seal Co., Ltd Email: doris@mechanicalseal.com.cn Skype: kathysunlin Fax: 86-573-84072317 Mob: 86-15381220188 WhatsApp: 8615958372402 Website: www.industrial-mechanicalseals.com Add: A-5 Wanyangzhongchuangcheng, Ganyao Town, Jiashan county, Jiaxing, Zhejiang, China. 314107