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

1. Check the Mechanical Seal Before Installation * Inspect all seal components carefully to ensure there is no damage, contamination, or deformation. * Verify that the seal model, size, materials, and operating parameters match the reactor requirements. 2. Cleanliness During Installation * Keep the working area clean and dust-free during installation. * Clean the shaft, seal chamber, and all sealing surfaces before assembly. * Avoid touching the seal faces with dirty hands or tools. 3. Shaft and Equipment Inspection * Check the shaft or sleeve surface for scratches, corrosion, or excessive wear. * Ensure the shaft runout and alignment are within the specified tolerance. * Confirm that the seal chamber dimensions meet the mechanical seal requirements. 4. Installation of Seal Faces * Handle the seal faces carefully to prevent scratches or impact damage. * Do not apply excessive force during installation. * Ensure the rotating and stationary faces are correctly aligned and fully seated. 5. O-Ring and Elastomer Installation * Check O-rings and elastomer parts for damage before installation. * Use a suitable lubricant compatible with the process medium when installing O-rings. * Avoid twisting, cutting, or overstretching elastomer components. 6. Spring and Rotating Parts Assembly * Ensure springs move freely without blockage. * Confirm the correct installation direction of rotating components. * Tighten all screws evenly according to the recommended torque. 7. Flushing and Cooling System * For high-temperature reactor applications, ensure the cooling or heating circulation system is properly connected. * Confirm that flushing liquid is clean and flowing before operation. * Avoid dry running of the mechanical seal. 8. Vacuum and Pressure Conditions * For vacuum reactor applications, check the seal design is suitable for negative pressure operation. * Perform a pressure and leakage test before starting the equipment. 9. Initial Operation Check * Rotate the shaft manually before startup to confirm smooth movement. * Start the reactor at low speed and monitor for abnormal vibration, noise, or leakage. * Check seal temperature and operating conditions during the first hours of operation. 10. Maintenance Recommendations * Regularly inspect leakage, vibration, temperature, and lubrication conditions. * Replace worn sealing components in time to prevent equipment damage. * Always follow the mechanical seal manufacturer’s installation instructions. Important: A mechanical seal is a precision component. Proper installation, clean working conditions, and correct operating parameters are essential to achieve reliable sealing performance and long service life   Jiaxing Burgmann Mechanical Seal Co., Ltd Email: doris@mechanicalseal.com.cn Mob: 86-15381220188 WhatsApp: 8615381220188 Website: www.industrial-mechanicalseals.com Add: A-5 Wanyangzhongchuangcheng, Ganyao Town, Jiashan county, Jiaxing, Zhejiang, China. 314107

A typical mechanical seal includes: 1. Seal Faces The seal faces are the most important working parts. Common materials include carbon, silicon carbide, tungsten carbide, and ceramic. The selection depends on the operating conditions, such as pressure, temperature, speed, and the type of medium. 2. Secondary Seals O-rings, elastomers, or bellows are used to prevent leakage between the seal components and the equipment shaft. 3. Spring System The spring provides the necessary closing force to maintain contact between the seal faces during operation. 4. Metal Parts Metal components provide mechanical support and protection. Materials such as stainless steel, alloy steel, and special alloys are commonly used for corrosion resistance.   Jiaxing Burgmann Mechanical Seal Co., Ltd Email: doris@mechanicalseal.com.cn Mob: 86-15381220188 WhatsApp: 8615381220188 Website: www.industrial-mechanicalseals.com Add: A-5 Wanyangzhongchuangcheng, Ganyao Town, Jiashan county, Jiaxing, Zhejiang, China. 314107

1. Pre-Work Safety Preparation * ☐ Confirm equipment is shut down and isolated (Lockout/Tagout applied) * ☐ Ensure zero pressure in pump and piping system * ☐ Drain and flush pump casing completely * ☐ Verify fluid is safe to handle (chemical/MSDS check) * ☐ Wear proper PPE (gloves, goggles, face shield, protective clothing) * ☐ Prepare clean working area to avoid contamination ⸻ 2. Pre-Disassembly Inspection * ☐ Record pump operating condition (temperature, pressure, leakage history) * ☐ Check seal leakage rate and location * ☐ Inspect coupling alignment condition (if accessible) * ☐ Mark relative positions of pump casing, gland, and shaft sleeve * ☐ Take photos before dismantling for reference ⸻ 3. Mechanical Seal Removal * ☐ Remove coupling guard * ☐ Disconnect coupling and check shaft movement * ☐ Remove pump cover / back pull-out assembly * ☐ Loosen gland plate bolts evenly in cross pattern * ☐ Carefully slide gland and seal assembly off shaft * ☐ Avoid scratching shaft sleeve or shaft surface * ☐ Remove stationary and rotating seal components separately * ☐ Keep seal faces clean and protected from impact * ☐ Inspect for abnormal wear pattern before cleaning ⸻ 4. Inspection After Removal * ☐ Check seal faces for cracks, heat marks, or scoring * ☐ Inspect elastomers (O-rings, gaskets) for swelling or hardening * ☐ Check shaft/sleeve for wear grooves or corrosion * ☐ Verify gland plate flatness and damage * ☐ Inspect bearing condition if axial/radial movement is suspected * ☐ Identify root cause of failure (dry running, misalignment, contamination, etc.) ⸻ 5. Preparation Before Installation * ☐ Clean all components with approved solvent * ☐ Ensure shaft/sleeve is smooth and burr-free * ☐ Replace worn sleeve or damaged components * ☐ Confirm correct seal type and material compatibility * ☐ Check installation dimensions against OEM drawing * ☐ Lightly lubricate O-rings (use compatible lubricant only) * ☐ Ensure seal faces are clean and not touched by hands ⸻ 6. Mechanical Seal Installation * ☐ Install stationary seat squarely into gland or housing * ☐ Ensure no tilt or misalignment during insertion * ☐ Install rotating seal unit onto shaft carefully * ☐ Avoid damaging elastomers during sliding * ☐ Position seal at correct installation length (per datasheet) * ☐ Tighten gland bolts evenly in cross pattern * ☐ Verify shaft rotation is smooth after assembly * ☐ Ensure correct spring compression / seal setting distance ⸻ 7. Reassembly of Pump * ☐ Reinstall pump casing and align components properly * ☐ Reconnect coupling and perform alignment check (laser/dial indicator) * ☐ Reinstall coupling guard * ☐ Confirm all bolts are torqued to specification * ☐ Reconnect flush / quench / barrier systems (if applicable) ⸻ 8. Pre-Start Checks * ☐ Verify pump is filled and fully primed * ☐ Confirm no dry running condition exists * ☐ Check seal support system pressure (if dual seal) * ☐ Ensure venting is complete * ☐ Rotate shaft manually to confirm no binding * ☐ Check instrument readings (pressure, temperature, flow) ⸻ 9. Start-Up Monitoring * ☐ Start pump and observe leakage level (initial slight leakage may occur) * ☐ Monitor vibration and noise * ☐ Check seal area temperature rise * ☐ Confirm stable operation within first 30–60 minutes * ☐ Inspect for abnormal leakage continuously * ☐ Record final operating parameters ⸻ 10. Post-Start Follow-Up * ☐ Re-check alignment after thermal stabilization * ☐ Verify seal chamber pressure stability * ☐ Confirm no abnormal wear signs after 24–48 hours * ☐ Log installation details for maintenance records   Jiaxing Burgmann Mechanical Seal Co., Ltd Email: doris@mechanicalseal.com.cn Mob: 86-15381220188 WhatsApp: 8615381220188 Website: www.industrial-mechanicalseals.com Add: A-5 Wanyangzhongchuangcheng, Ganyao Town, Jiashan county, Jiaxing, Zhejiang, China. 314107

1. General Safety Requirements * Do not touch the seal faces with bare hands or any contaminated objects. * Always wear clean gloves during installation to avoid contamination. * Keep the installation area clean, dry, and free from dust and metal particles. * Ensure the seal model (M481), size, and materials are fully compatible with the working fluid. ⸻ 2. Pre-Installation Inspection * Check shaft or sleeve surface for scratches, corrosion, or wear. * Ensure shaft runout and alignment are within allowable limits. * Verify that the seal chamber and gland plate are clean and undamaged. * Confirm all seal components are complete and undistorted. ⸻ 3. Shaft and Equipment Requirements * Shaft surface must be smooth, clean, and properly chamfered. * Remove all burrs and sharp edges before installation. * Ensure proper concentricity between shaft and seal chamber. * Do not install the seal on a worn or undersized shaft surface. ⸻ 4. Handling of Seal Faces * Seal faces are precision-lapped components and must not be scratched. * Avoid dropping or impacting any seal parts. * Do not place seal faces directly on hard surfaces. ⸻ 5. Lubrication Requirements * Lightly lubricate O-rings with compatible lubricant before assembly. * Use clean water, glycol, or approved grease depending on elastomer material. * Do not use petroleum-based lubricants unless specified by manufacturer. ⸻ 6. Installation Precautions * Install stationary and rotating components in correct orientation. * Ensure correct spring compression according to installation dimension. * Tighten gland bolts evenly in a crisscross pattern to avoid distortion. * Do not over-tighten set screws or gland bolts. ⸻ 7. Alignment and Assembly Control * Maintain proper shaft alignment before final tightening. * Ensure uniform contact between seal faces after assembly. * Check that the rotating unit moves freely without binding. ⸻ 8. Pre-Start Checklist * Rotate shaft manually before starting the pump to ensure smooth operation. * Confirm that no dry-running condition exists. * Fill the seal chamber with process fluid and remove all air. * Verify that all installation tools, clips, and locking devices are removed. ⸻ 9. Operation Warning * Dry running is strictly prohibited even for a few seconds. * Monitor initial operation for leakage, vibration, and temperature rise. * Stop the pump immediately if abnormal noise or leakage occurs.   Jiaxing Burgmann Mechanical Seal Co., Ltd Email: doris@mechanicalseal.com.cn Mob: 86-15381220188 WhatsApp: 8615381220188 Website: www.industrial-mechanicalseals.com Add: A-5 Wanyangzhongchuangcheng, Ganyao Town, Jiashan county, Jiaxing, Zhejiang, China. 314107