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

1. General Safety & Pre-Installation Precautions • Strictly prohibit touching the lapped seal faces with bare hands or placing them directly on workbenches; use clean, lint-free cloths and non-particle solvents for cleaning. • Confirm the seal model (M481), size, and material compatibility with the process medium (e.g., EPDM rubber incompatible with mineral oils). • Ensure the installation environment is dust-free, dry, and temperature-controlled (15–35°C). • Wear nitrile gloves and safety glasses during assembly to avoid contamination and injury. 2. Shaft & Seal Chamber Preparation 2.1 Shaft/Sleeve Specifications • Shaft runout at the seal installation area: ≤0.1 mm (0.004 in). • Shaft bending: ≤0.05 mm (0.002 in). • Axial end play: ≤0.5 mm (0.020 in). • Shaft tolerance: h8; surface finish: Ra ≤1.6 μm. • Shaft/sleeve end: Chamfer 1×45° and polish to remove burrs. 2.2 Cleaning & Inspection • Clean the shaft, sleeve, seal chamber, and gland with a lint-free cloth and volatile solvent (e.g., isopropyl alcohol); remove all rust, scale, and debris. • Inspect for: ◦ Cracks, scratches, or corrosion on the shaft/sleeve. ◦ Distortion or damage to the seal chamber/gland. ◦ Proper alignment of the shaft and seal chamber (concentricity ≤0.05 mm). 3. M481 Seal Component Overview • Rotating Unit: Rotary face (carbon/silicon carbide), O-ring, spring, drive collar, set screws. • Stationary Unit: Stationary face (ceramic/silicon carbide), O-ring, gland, anti-rotation pin. • Hardware: Gland bolts, lock washers, setting clips (for transport protection). 4. Step-by-Step Assembly 4.1 Pre-Assembly of Stationary Unit 1. Insert the stationary face into the gland; align the anti-rotation pin with the gland slot to prevent rotation. 2. Lubricate the stationary face O-ring with compatible lubricant (water/glycol for EPDM; silicone grease for Viton). 3. Install the O-ring into the gland groove; ensure no twisting or pinching. 4. Place the gland assembly onto the clean workbench (stationary face up). 4.2 Pre-Assembly of Rotating Unit 1. Slide the spring onto the drive collar; ensure the spring is seated evenly and free of distortion. 2. Lubricate the rotary face O-ring with compatible lubricant; install into the rotary face groove. 3. Attach the rotary face to the drive collar; align the drive lugs and press firmly until seated. 4. Check spring free length: M481 standard free length = 12 mm; compression range = 1.5–2.0 mm (±0.2 mm tolerance). 4.3 Installation onto Shaft & Seal Chamber 1. Slide the stationary gland assembly over the shaft and into the seal chamber; hand-tighten the gland bolts diagonally (cross pattern) to avoid tilting. 2. Mark the shaft sleeve at the gland face (reference line 1). 3. Slide the rotating unit onto the shaft/sleeve; align the drive collar with the shaft key (if applicable). 4. Adjust the rotating unit position to achieve the correct spring compression: ◦ Measure the distance from reference line 1 to the rotating unit back face (setting dimension for M481: 10 ±0.2 mm). 5. Tighten the drive collar set screws (2×M4) to 3–4 N·m torque; secure with lock washers. 6. Finalize gland bolt torque: Tighten diagonally in 3 stages to 8–10 N·m (M8 bolts). 7. Critical: Remove all setting clips/transport locks from the seal faces after final torque. 4.4 Post-Assembly Checks 1. Manually rotate the shaft 2–3 full turns; rotation must be smooth, no binding, grinding, or tight spots. 2. Verify spring compression: Recheck the setting dimension; adjust if necessary. 3. Inspect seal faces: Confirm full contact, no gaps, scratches, or debris between faces. 5. Pre-Startup & Operation • Prime the pump: Fill the seal chamber with process liquid; never dry-run (even 3 seconds of dry running will damage the seal faces). • Remove all air from the seal chamber and piping. • Start the pump at low speed; gradually increase to rated speed. • Monitor during initial operation (5–10 minutes): ◦ Leakage: ≤1 drop per minute (normal for mechanical seals). ◦ Temperature: Seal chamber temperature ≤80°C. ◦ Vibration: No abnormal noise or vibration. 6. Maintenance & Troubleshooting 6.1 Routine Maintenance • Check leakage and temperature daily during operation. • Inspect seal faces and O-rings every 3 months (or 2,000 operating hours). • Replace O-rings every 6 months (or 4,000 operating hours) to prevent aging and leakage. 6.2 Common Issues & Solutions Problem Cause Solution Excessive leakage Incorrect spring compression; damaged O-ring; contaminated seal faces Adjust compression; replace O-ring; clean or replace seal faces High temperature Dry run; insufficient flush; misalignment Prime pump; increase flush flow; realign shaft/seal Short seal life Abrasive medium; poor lubrication; over-tightened bolts Install external flush (API Plan 32); use compatible lubricant; torque bolts correctly 7. Storage & Handling • Store M481 seals in a cool, dry place (temperature: 5–25°C; humidity: ≤60%). • Keep seals in original packaging until installation; avoid direct sunlight and dust. • Do not stack heavy objects on seal components to prevent distortion.   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‑assembled Cartridge Design for Easy Installation & Reliability The M481 series is a factory‑preassembled and pre‑tested cartridge unit. This plug‑and‑play design eliminates on‑site assembly errors, reduces installation time and labor costs, and ensures consistent sealing performance right out of the box. It is delivered as a single integrated module, ready for direct mounting on agitators, reactors, and mixing vessels. 2. Bidirectional Rotation Independence Engineered with a non‑directional rotating mechanism (multiple rotating springs), the seal operates reliably regardless of shaft rotation direction (clockwise or counterclockwise). This flexibility simplifies equipment design and retrofitting, avoiding the need for custom seals for specific rotation directions. 3. Robust Sealing Performance Under Fluctuating Pressures A core advantage is its ability to remain tightly sealed during pressure variations or even pressure reversal. It supports both single‑seal operation with buffer fluid (up to 6 bar) and double‑seal operation with pressurized barrier fluid (max 12 bar), ensuring zero leakage in dynamic pressure environments. 4. Wide Operating Parameter Range • Pressure: Vacuum to 10 bar (single seal); up to 16 bar (double seal) • Temperature: -40°C to +200°C (‑40°F to +392°F), with high‑temperature variants for up to 350°C • Shaft Speed: Up to 3 m/s (16 ft/s), exceeding DIN standard limits for higher‑speed applications • Shaft Diameter: 40 mm to 220 mm, covering most standard agitator and reactor shaft sizes 5. Superior Material Versatility & Chemical Compatibility Customizable material combinations suit corrosive, abrasive, and high‑temperature media: • Seal Faces: Resin carbon, antimony‑impregnated carbon, silicon carbide (SiC), tungsten carbide (TC), alumina • Elastomers: FKM (Viton), FFKM (Kalrez), EPDM, NBR, AFLAS (resistant to acids, solvents, steam, and oils) • Metal Components: SS304, SS316, Duplex steel, Hastelloy C (for harsh chemical environments) • Metal‑free Product Side: Optional design for food, pharmaceutical, and ultra‑clean applications 6. DIN Standard Compliance for Easy Standardization & Retrofitting All mounting dimensions conform to DIN 28136 (vessels), DIN 28141 (flanges), and DIN 28154 (sleeves). This compliance enables seamless standardization across plants, easy replacement of old seals, and compatibility with carbon steel/stainless steel reactors without modifying equipment. 7. Optional Bearing Configuration for Enhanced Stability Available with or without an integrated bearing. The bearing‑equipped version reduces shaft runout and vibration in heavy‑duty agitators, extending seal life and improving operational stability in high‑load mixing applications. 8. Long Service Life & Reduced Maintenance Costs High‑precision manufacturing and wear‑resistant materials minimize friction and abrasion. The robust structure withstands thermal cycling, mechanical shocks, and continuous operation, reducing unplanned downtime and maintenance frequency. This lowers total ownership costs for industrial users. 9. Versatile Applications Across Industries Ideal for top‑entry agitators, reactors, and mixing vessels in: • Chemical & petrochemical (high‑pressure polymerization, corrosive media) • Pharmaceutical (sterile sealing, CIP/SIP compatibility) • Food & beverage (metal‑free options, FDA‑compliant materials) • Water & wastewater (abrasive media resistance) • Energy (thermal cycling, high‑temperature processes) 10. High Safety & Environmental Compliance Zero‑leakage performance prevents hazardous fluid emissions, meeting strict environmental regulations. The double‑seal design provides an extra safety barrier for toxic, flammable, or volatile media, protecting personnel and the environment.   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. Sealing Structure • Mechanical seal: Face contact static & dynamic seal, precision end-face friction pair • Gland packing: Soft packing compression seal, contact shaft circumferentially 2. Leakage Performance • Mechanical seal: Extremely low leakage, nearly zero leakage • Gland packing: Obvious allowable leakage, cannot achieve zero leakage 3. Service Life • Mechanical seal: Long service life, low replacement frequency • Gland packing: Short service life, easy wear, frequent replacement 4. Friction & Power Consumption • Mechanical seal: Small friction resistance, low power loss • Gland packing: Large friction resistance, high energy consumption 5. Maintenance • Mechanical seal: Maintenance-free in service, simple replacement • Gland packing: Needs regular tightening and frequent maintenance 6. Application • Mechanical seal: Pumps, reactors, high speed / high pressure / corrosive working conditions • Gland packing: Low pressure, low speed, simple ordinary equipment   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

1. Reliable Sealing: Extremely low leakage (≈1% of soft packing seals); stable performance during long-term operation. 2. Long Service Life: 1–2 years in oil/water media, ≥6 months in chemical media. 3. Low Friction Loss: Friction power consumption is only 10%–50% of soft packing seals. 4. Minimal Shaft Wear: Shaft/sleeve remains almost unworn. 5. Long Maintenance Intervals: Automatic wear compensation; no frequent maintenance needed. 6. Good Vibration Resistance: Insensitive to shaft vibration, runout, or seal cavity misalignment. 7. Wide Application Range: Suitable for high/low temperature, high pressure, vacuum, and corrosive/abrasive media. 8. Adaptability to Twin-Screw Pumps: Matches screw pump characteristics (stable flow, low pulsation); compatible with non-lubricating/viscous media. Precautions for Use Installation 1. Alignment & Concentricity: ◦ Tighten gland bolts evenly after coupling alignment; face runout ≤0.05 mm. ◦ Gland-to-shaft/sleeve clearance uniform; concentricity tolerance ≤0.01 mm. 2. Spring Compression: Compress per specifications (error ≤2 mm); excessive compression accelerates wear, insufficient causes leakage. 3. Dynamic Ring Flexibility: Ensure free axial movement; must rebound automatically when pressed. 4. Cleanliness: Keep sealing elements and cavity free of debris; lubricate with compatible fluid during assembly.   Jiaxing Burgmann Mechanical Seal Co., Ltd Email: doris@mechanicalseal.com.cn Skype: kathysunlin Fax: 86-573-84072317 Mob: 86-15381220188 WhatsApp: 8615381220188 Website: www.industrial-mechanicalseals.com Add: A-5 Wanyangzhongchuangcheng, Ganyao Town, Jiashan county, Jiaxing, Zhejiang, China. 314107