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

I. Core Advantages (Compared with Conventional Spring Seals) 1. Excellent Adaptability to High & Low Temperatures • No vulnerable components prone to failure under extreme temperatures • Stable performance in high-temperature, low-temperature and fluctuating temperature conditions 2. Superior Axial Flexibility & Compensation Ability • Metal bellows act as both elastic element and secondary seal • Effectively compensates for shaft runout, axial movement and installation misalignment 3. No Clogging & Long Service Life • No small springs that may get stuck by particles, crystals or viscous media • Reduces frequent maintenance and replacement 4. Strong Corrosion Resistance • Made of high-grade alloys (Hastelloy, Inconel, stainless steel, etc.) • Suitable for corrosive, toxic and hazardous media 5. Zero Leakage & High Reliability • Integral welded structure minimizes leakage points • Ideal for flammable, explosive and environmentally sensitive fluids 6. Wide Pressure & Speed Range • Performs well in high-pressure and high-speed working conditions • Maintains stable sealing under variable working loads II. Operating Instructions 1. Installation Requirements • Keep sealing surfaces clean and scratch-free • Ensure concentricity of shaft and sealing cavity • Tighten fasteners evenly to avoid distortion 2. Media Compatibility • Select appropriate bellows material according to medium properties, temperature and concentration • Not recommended for media causing severe erosion or rapid crystallization 3. Start-Up & Operation • Run-in at low speed and pressure before full operation • Avoid dry running, which may cause overheating and damage • Maintain stable lubrication and cooling conditions 4. Maintenance & Inspection • Regularly check for leaks, abnormal noise or vibration • Inspect bellows for cracks, deformation or fatigue damage • Replace worn sealing faces and gaskets in a timely manner 5. Storage Conditions • Store in dry, dust-free environment away from direct sunlight • Prevent collision or compression that may deform the bellows   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 seals are critical components in rotating machinery such as pumps, compressors, and mixers, responsible for preventing fluid leakage between rotating and stationary parts. Their service life directly affects the operational stability, maintenance cost, and production efficiency of the entire equipment system. The following detailed technical measures are formulated to effectively prolong the service life of mechanical seals from the perspectives of model selection, installation and commissioning, operational control, daily maintenance, and working condition optimization. 1. Scientific and Reasonable Model Selection and Material Matching Model selection is the primary prerequisite for ensuring the long-term stable operation of mechanical seals. It is essential to conduct comprehensive matching based on actual operating parameters and medium characteristics. • Match with operating parameters: Accurately calculate and confirm the operating pressure, temperature, rotating speed, and shaft diameter of the equipment. Select mechanical seals suitable for high-pressure, high-temperature, low-temperature, or high-speed working conditions to avoid overload operation caused by improper model selection. • Select sealing materials according to medium characteristics: For corrosive media, choose corrosion-resistant sealing end faces and auxiliary sealing materials, such as silicon carbide, tungsten carbide for end faces, and perfluoroelastomer for auxiliary seals. For abrasive media, give priority to wear-resistant and scouring-resistant material combinations to resist particle erosion. • Consider application scenarios: Select appropriate structural forms such as single-end face, double-end face, or cartridge mechanical seals for special working conditions like high dust, easy crystallization, and toxic media, to enhance the adaptability of the seal. 2. Standardized Installation and Commissioning Operations Non-standard installation is one of the main causes of premature failure of mechanical seals. Strictly follow the technical specifications for installation and commissioning. • Pre-installation inspection: Check the dimensional accuracy, surface roughness, and wear degree of the shaft, shaft sleeve, sealing cavity, and mating parts; ensure no burrs, scratches, or deformation. Clean all parts thoroughly to remove iron filings, dust, and impurities. • Control installation accuracy: Ensure the radial runout of the shaft meets the standard, avoid excessive shaft eccentricity and axial movement; strictly control the compression amount of the mechanical seal spring to prevent over-compression leading to excessive end face wear or under-compression causing leakage. • Ensure concentricity and parallelism: Guarantee the high concentricity between the rotating and stationary parts of the seal, and the high parallelism of the sealing end faces to avoid uneven stress and partial wear. • Pre-lubrication treatment: Apply a thin layer of clean lubricating grease or compatible medium on the sealing end faces and auxiliary seals before installation to avoid dry friction damage during initial startup. 3. Optimize Operating Conditions and Avoid Abnormal Operation Stable operating conditions can greatly reduce the wear and damage of mechanical seals, and avoid various abnormal working states. • Prevent dry friction: Ensure sufficient lubrication and flushing of the sealing end faces at all times. Configure a special flushing pipeline for equipment prone to insufficient lubrication, and control the flow and pressure of the flushing liquid to take away friction heat and block impurities. • Stabilize operating parameters: Avoid frequent fluctuations in operating pressure, temperature, and speed; prevent sudden load changes, frequent startup and shutdown, and idle running, which will cause thermal shock and mechanical impact on the sealing end faces. • Block impurity intrusion: Install filters, strainers, and other devices at the equipment inlet to prevent solid particles, sediment, and other impurities from entering the sealing cavity, so as to avoid scratching and abrasion of the sealing end faces. • Control medium crystallization and scaling: For media prone to crystallization and scaling, adopt appropriate flushing, cooling, or heat preservation measures to prevent crystal particles from adhering to the sealing end faces and causing seal failure. 4. Regular Daily Maintenance and Timely Fault Handling Implement standardized maintenance management to detect and deal with potential faults of mechanical seals in advance. • Regular inspection: Regularly check the sealing part for leakage, abnormal noise, vibration, and overheating during equipment operation; monitor the temperature of the sealing cavity and the state of the flushing system in real time. • Periodic maintenance: Formulate a periodic maintenance plan according to the operating cycle and working conditions, replace worn sealing end faces, damaged auxiliary seals, and failed springs in a timely manner; check and adjust the compression state of the elastic elements. • Timely handling of abnormal faults: Once slight leakage, abnormal temperature rise, and other problems are found, stop the machine for inspection immediately instead of continuing operation with faults, so as to prevent minor faults from expanding and causing complete damage to the mechanical seal. 5. Reasonable Storage and Spare Part Management For spare mechanical seals, scientific storage is also crucial to avoid performance degradation before installation. • Control storage environment: Store in a dry, cool, and dust-free environment, avoid direct sunlight, high temperature, and heavy pressure, to prevent aging, deformation, and rusting of auxiliary seals and elastic parts. • Protect sealing end faces: Cover the sealing end faces with protective covers to avoid collision and scratch damage; do not disassemble the original packaging at will before installation. • Rotate spare parts usage: Follow the principle of first-in first-out for spare parts to avoid long-term idle storage leading to performance failure of sealing components.   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

Balanced mechanical seals represent a superior sealing solution for rotating equipment, offering a host of performance, efficiency, and economic benefits that make them the preferred choice for demanding industrial applications. Unlike unbalanced seals, their design strategically reduces hydraulic loading on seal faces, unlocking transformative advantages across operating conditions. Extended Service Life & Reduced Wear The core advantage lies in controlled face pressure. By minimizing hydraulic closing forces, balanced seals drastically lower friction and wear between mating surfaces. This design typically extends seal life by 300–500% compared to unbalanced alternatives, cutting replacement frequency and maintenance labor. Even under high pressures, face loading remains stable, preventing rapid degradation and ensuring consistent performance over time. Superior High-Pressure Capability Balanced seals excel in high-pressure environments (typically above 50 psi/3.4 bar) where unbalanced designs fail. Their hydraulic balance maintains stable face contact across fluctuating pressures, eliminating leakage risks in critical applications like refineries, chemical plants, and high-pressure pumping systems. This versatility eliminates the need for specialized seals across different pressure ranges. Enhanced Energy Efficiency Reduced friction directly translates to lower power consumption. Balanced seals require significantly less operating energy than unbalanced counterparts, with power losses often just 10–50% of traditional packing seals. Over continuous operation, this efficiency yields substantial energy cost savings and aligns with sustainability goals. Lower Heat Generation & Thermal Stability Minimized friction produces far less heat at seal faces. This thermal stability prevents material degradation, protects adjacent components (bearings, gaskets), and reduces cooling system demands. Lower operating temperatures also preserve fluid properties, making balanced seals ideal for temperature-sensitive processes. Improved Reliability & Leak Prevention Consistent face pressure ensures reliable sealing across variable conditions, drastically reducing unplanned downtime. Near-zero leakage meets strict environmental and safety standards, preventing product loss, contamination, and regulatory penalties. Predictable performance enables proactive maintenance scheduling, avoiding costly emergency repairs. Versatility & Application Adaptability Balanced seals perform reliably with corrosive chemicals, high/low temperatures, and poor-lubricity fluids. They adapt to high speeds, vacuum conditions, and aggressive media, serving industries from petrochemical to pharmaceuticals. This broad applicability simplifies inventory management by standardizing seal types across equipment. Economic Benefits While initial costs may be higher, long-term savings dominate: reduced maintenance, fewer replacements, lower energy use, and minimal product loss often deliver ROI within the first year. Lower spare parts inventory and simplified procurement further boost cost-effectiveness. Conclusion Balanced mechanical seals deliver a compelling combination of longevity, efficiency, and reliability. Their design addresses critical limitations of unbalanced seals, making them indispensable for modern industrial operations seeking performance, safety, and sustainability. For high-pressure, high-value, or critical applications, they represent not just an upgrade, but a necessary investment in operational excellence.     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

Large‑spring mechanical seals are a robust sealing solution widely used in pumps, mixers, reactors, and other rotating equipment across industries such as chemical processing, pulp and paper, wastewater treatment, and power generation. Compared with multi‑spring and conventional packing seals, they deliver unique performance and reliability benefits in demanding operating conditions. 1. Exceptional Anti‑Clogging & Anti‑Jamming Performance The large‑spring design features a large coil pitch and open structure, which effectively prevents clogging caused by solid particles, slurry, crystalline substances, or fibrous media in the fluid. Unlike small multi‑springs that easily trap debris and lose elasticity, large springs maintain consistent compression force and avoid spring failure due to blockage, making them ideal for abrasive or dirty media applications. 2. Stable & Uniform Sealing Force A single large spring provides concentrated, uniform axial closing force across the entire seal face, ensuring stable contact pressure even under fluctuating pressure, temperature, or shaft movement. This eliminates uneven wear common with multi‑spring arrangements and maintains reliable sealing performance over long service periods. 3. Strong Adaptability to Shaft Misalignment & Axial Movement Large springs offer greater flexibility and deflection range, accommodating minor shaft runout, eccentricity, and axial displacement caused by bearing wear, thermal expansion, or mechanical vibration. The seal faces can “follow” shaft movement dynamically, preserving sealing integrity and reducing leakage risks in less‑than‑ideal installation conditions. 4. Excellent Corrosion & High‑Temperature Resistance Large springs are typically manufactured from high‑grade stainless steel (316/316L), Hastelloy, or other corrosion‑resistant alloys, delivering superior durability in corrosive, high‑temperature, or harsh chemical environments. Their robust construction resists fatigue and maintains elasticity better than small springs under prolonged stress. 5. Simplified Structure & Easy Installation & Maintenance Large‑spring seals have fewer components and a more straightforward design than multi‑spring types, simplifying assembly, disassembly, and on‑site maintenance. The single‑spring structure reduces alignment complexity, shortens downtime during replacement, and lowers labor and operational costs. 6. Extended Service Life & Reduced Total Cost of Ownership With stable force, anti‑clogging capability, and minimal wear, large‑spring seals achieve longer operational lifespans and require less frequent replacement. Lower maintenance frequency and reduced unplanned downtime significantly cut long‑term operating expenses, offsetting higher initial investment compared to packing seals. 7. Wide Applicability Across Harsh Industrial Environments These seals perform reliably in high‑pressure, high‑temperature, abrasive, and corrosive conditions, serving pulp and paper, chemical, mining, wastewater, and pharmaceutical industries. They are particularly well‑suited for equipment handling slurry, fibrous fluids, and media with solid impurities. Conclusion Large‑spring mechanical seals stand out for their anti‑clogging performance, stable sealing force, shaft misalignment tolerance, corrosion resistance, ease of maintenance, and long service life. They represent a cost‑effective, high‑reliability sealing choice for heavy‑duty industrial applications, helping improve equipment efficiency, reduce leakage risks, and support sustainable, compliant operations.   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

Double mechanical seals (also called dual mechanical seals) are advanced sealing systems with two sets of sealing faces, offering superior performance over single mechanical seals in demanding industrial applications. Below is a comprehensive article on their core advantages. Enhanced Safety and Leak Prevention The most critical benefit of double mechanical seals is their redundant sealing design. With two independent sealing interfaces, they create dual barriers against fluid leakage. Even if the primary seal wears out or fails, the secondary seal maintains containment, eliminating risks of hazardous fluid release. This makes them ideal for handling toxic, flammable, corrosive, or environmentally sensitive fluids, where even minor leaks pose severe safety and environmental threats. Superior Operational Reliability Double mechanical seals deliver unmatched reliability in harsh conditions. The barrier fluid system between the two seals provides consistent lubrication and cooling for both sealing faces, reducing friction and thermal damage. This controlled operating environment minimizes seal face wear, significantly extending service life compared to single seals. They also withstand high pressure, extreme temperatures, and abrasive media better than single seals, ensuring stable performance in heavy-duty industrial processes. Improved Equipment Efficiency and Uptime By reducing seal wear and preventing unexpected failures, double mechanical seals cut down on unplanned downtime. The barrier fluid acts as an early warning system—contamination in the fluid signals primary seal degradation before a catastrophic failure occurs, enabling predictive maintenance. This reduces repair frequency and equipment overhaul intervals, boosting overall operational efficiency. Additionally, lower friction between components improves energy efficiency. Environmental Compliance and Contamination Control Double mechanical seals effectively prevent fugitive emissions, meeting strict environmental regulations. They also isolate process fluids from external contaminants, maintaining media purity in high-purity applications. This dual protection ensures compliance with global environmental standards and supports corporate sustainability goals. Cost-Effectiveness in Long-Term Operation Though double mechanical seals have higher upfront costs than single seals, their long-term benefits outweigh the investment. Longer seal life reduces replacement and labor costs; fewer failures cut downtime and production losses; and lower maintenance requirements lower total operational expenses. For critical applications, the cost savings from avoided accidents, environmental fines, and equipment damage are substantial. Versatility and Adaptability Double mechanical seals suit diverse industrial scenarios, including petrochemical, pharmaceutical, food processing, and water treatment. They can be configured as pressurized (double seals) or unpressurized (tandem seals) to match specific process needs. Flexible barrier fluid selection (water, oil, synthetic fluids) further adapts them to different operating conditions. Conclusion Double mechanical seals stand out as a high-performance sealing solution, offering enhanced safety, reliability, efficiency, environmental compliance, and long-term cost savings. For industries handling hazardous fluids or operating in demanding environments, they are the preferred choice to ensure equipment stability, personnel safety, and environmental protection.   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. What is a mechanical seal A mechanical seal is a device used to prevent fluid leakage along a rotating shaft in pumps, compressors, mixers, and other rotating equipment. It uses two flat faces (rotating and stationary) in contact to form a sealing barrier, supported by springs and secondary seals. 2. Main functions - Seal liquids and gases inside equipment - Prevent external leakage and pollution - Reduce energy loss - Protect bearings and gearboxes from fluid damage - Improve safety and reliability of rotating machinery 3. Basic structure - Rotating ring: rotates with the shaft - Stationary seat: fixed to the equipment housing - Spring component: provides closing force - Secondary seals: O-rings, gaskets, PTFE parts - Retainer and clamping parts 4. Common types - Single mechanical seal - Double mechanical seal - Tandem seal - Cartridge mechanical seal - Balanced seal - Unbalanced seal - Metal bellows seal - Spring seal - Conical spring seal 5. Common face materials - Carbon graphite - Silicon carbide (SiC) - Tungsten carbide - Ceramic - Stellite 6. Common elastomer materials - Nitrile rubber (NBR) - Fluororubber (FKM / Viton) - EPDM - Silicone - PTFE 7. Key working parameters - Operating pressure - Operating temperature - Shaft speed - Shaft diameter - Medium type (water, oil, chemical, corrosive fluid) - Wear resistance - Corrosion resistance - Thermal stability 8. Application industries - Petrochemical & chemical industry - Oil & gas - Water treatment & sewage - Power plants - Pharmaceutical - Food & beverage - Paper making - Mining - Marine & shipbuilding 9. Failure causes (common) - Improper installation - Dry running - Excessive pressure or temperature - Abrasive particles in fluid - Material incompatibility - Vibration and shaft runout - Poor flushing and cooling 10. Industry requirements - High reliability - Long service life - Low leakage - Easy installation and maintenance - Energy saving - Compliance with international standards (API, ISO, DIN) 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 flushing plans are standardized piping arrangements defined by API 682 to cool, lubricate, clean, and pressurize seal chambers, extending seal life and ensuring reliable operation. Below are the most common plans with concise English descriptions for technical documentation and catalogs.   Basic Internal Recirculation Plans   - Plan 01 Internal flow passages within the pump casing circulate process fluid to the seal chamber without external piping. Simple, low-cost, and suitable for clean, low-temperature services.   - Plan 11 Process fluid recirculates from the pump discharge through a flow-control orifice to the seal chamber. The most widely used plan for clean fluids, providing effective cooling and lubrication with minimal complexity .   - Plan 13 Fluid flows from the seal chamber back to the pump suction via a restricted orifice. Ideal for vertical pumps to prevent vapor locking and ensure continuous venting .   Cooled & Filtered Recirculation Plans   - Plan 21 Discharge fluid passes through a heat exchanger (cooler) and flow-control orifice before entering the seal chamber. Designed for high-temperature applications to lower seal chamber temperature .   - Plan 22 Combines Plan 21 with a Y-strainer to filter solids from the recirculating fluid. Suited for fluids with light particulate contamination .   - Plan 23 Closed-loop circulation with a dedicated heat exchanger; fluid is pumped from the seal chamber, cooled, and returned. Highly efficient for extreme-temperature services, minimizing process fluid usage .   External & Specialized Plans   - Plan 32 Clean, compatible fluid from an external source is injected directly into the seal chamber. Used for dirty, polymerizing, or high-solids fluids to isolate the seal from process contaminants .   - Plan 41 Recirculation with a cyclone separator to remove solids from the flush stream. Effective for fluids with moderate to high solid content .   Dual Seal Support Plans   - Plan 52 Unpressurized buffer fluid system for dual seals; circulates buffer fluid between inner and outer seals with a reservoir and heat exchanger. Used for toxic or hazardous fluids .   - Plan 53A/B/C Pressurized barrier fluid systems for dual seals, maintaining barrier fluid pressure above process pressure to prevent leakage. Available with bladder accumulators (53A), piston accumulators (53B), or external pumping (53C) .   - Plan 54 Pressurized barrier fluid supplied from an external source to dual seals. Suitable for critical, high-pressure, or corrosive applications requiring continuous clean fluid supply .   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

Selecting the right materials for mechanical seals is critical to ensuring leak-tight performance, long service life, and reliable operation in industrial applications. The selection process must be guided by the operating environment, medium characteristics, and mechanical requirements—here’s a systematic breakdown of the key principles and practices: 1. Prioritize Compatibility with the Sealed Medium The sealed medium (liquid, gas, or slurry) is the primary determinant of material selection. Focus on three core properties: - Corrosiveness: Choose corrosion-resistant materials for aggressive media (e.g., acids, alkalis, solvents). Silicon Carbide (SiC) and Tungsten Carbide (WC) excel in corrosive environments, while elastomers like Fluororubber (FKM) or Perfluoroelastomer (FFKM) resist chemical degradation better than Nitrile Rubber (NBR). - Abrasiveness: For media containing solids (e.g., slurries, pigments), opt for hard, wear-resistant face materials. Tungsten Carbide (WC) with cobalt binder or reaction-bonded Silicon Carbide (RBSC) offers superior abrasion resistance; pair with a softer carbon graphite secondary face to minimize friction. - Temperature & Pressure: High-temperature (above 200°C) or high-pressure (above 10 bar) conditions demand materials with thermal stability and mechanical strength. Silicon Carbide (SiC) maintains hardness at extreme temperatures, while PTFE (Polytetrafluoroethylene) is ideal for low-friction, high-temperature elastomer applications. 2. Ensure Seal Face Pairing Compatibility Mechanical seal faces require a "hard-soft" pairing to balance wear resistance and sealing efficiency: - Common pairings: WC vs. Carbon Graphite, SiC vs. Carbon Graphite, or SiC vs. SiC (for ultra-high purity or non-abrasive media). - Avoid pairing two hard materials (e.g., WC vs. WC) as they cause excessive friction and premature failure; avoid two soft materials (e.g., Carbon Graphite vs. Carbon Graphite) for abrasive or high-pressure scenarios. 3. Align with Operating Conditions - Rotational Speed: High-speed applications (above 3000 RPM) need materials with low friction coefficients and high thermal conductivity. SiC and WC are preferred for their ability to dissipate heat, while PTFE-filled carbon graphite reduces friction. - Shaft Runout & Misalignment: For applications with moderate shaft runout, elastomers like EPDM (Ethylene Propylene Diene Monomer) offer flexibility, while rigid face materials (SiC, WC) suit precise alignment. - Environmental Constraints: Food, pharmaceutical, or drinking water applications require FDA-approved materials (e.g., PTFE, EPDM, or 316 stainless steel metal components) to ensure non-toxicity and compliance. 4. Reference Common Material Selection Guidelines Material Type Key Advantages Typical Applications Silicon Carbide (SiC) High hardness, corrosion/wear resistance Aggressive media, high-temp/pressure systems Tungsten Carbide (WC) Exceptional abrasion resistance Slurries, abrasive fluids, heavy-duty pumps Carbon Graphite Low friction, self-lubricating Low-abrasive media, low-to-medium speed pumps Fluororubber (FKM) Chemical resistance, high temp tolerance Oil, solvents, high-temperature applications PTFE Non-stick, chemical inertness Corrosive chemicals, food-grade applications By integrating medium compatibility, face pairing logic, and operating condition alignment, you can select mechanical seal materials that optimize performance, reduce maintenance costs, and prevent unplanned downtime.   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. Process: RBSC forms via reaction bonding with residual silicon; PLSSC sinters at high temp without external pressure. 2. Density & Porosity: RBSC is low-density with porosity; PLSSC is high-density, almost fully dense. 3. Performance: RBSC has good impact resistance; PLSSC excels in hardness, corrosion resistance and high-temperature stability. 4. Cost: RBSC is cost-effective; PLSSC is more expensive due to complex process.     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. 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.     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. A mechanical seal is a critical component used to prevent fluid leakage in rotating equipment like pumps, mixers and compressors. 2. It mainly consists of stationary ring, rotating ring, spring, auxiliary seal and gland, forming a sealed face via precise fitting. 3. The sealed faces (rotating & stationary) are the core part, requiring high flatness to ensure tight sealing under pressure. 4. Mechanical seals are divided into single-end, double-end, balanced and unbalanced types based on structure and working principle. 5. Temperature, pressure, medium corrosiveness and rotational speed are key factors affecting mechanical seal service life. 6. Common materials for seal faces include silicon carbide, tungsten carbide, alumina ceramic and carbon graphite for good wear resistance. 7. Auxiliary seals are usually made of fluororubber, nitrile rubber or PTFE to adapt to different media and temperatures. 8. Proper installation with accurate alignment can avoid premature wear and leakage of mechanical seals. 9. Regular cleaning and lubrication of the seal area help maintain its sealing performance and extend service life. 10. Mechanical seals have better sealing effect and longer service life than traditional packing seals in industrial applications.   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

Chemical cartridge seal assembly is safe, precise, and standardized—follow this concise step-by-step guide for leak-free results, with emphasis on cleanliness, alignment, and no impact force. Pre‑Assembly Prep - Safety First: Wear chemical‑resistant PPE (gloves, goggles, apron); work in a ventilated area with spill kits. - Inspect: Check cartridge for damage; verify all components (gland, O‑rings, set screws, springs) match the model; discard if seal faces are chipped/scratched. - Shaft/Chamber Prep: Clean shaft/sleeve (Ra 0.2–0.4 μm) and seal chamber; confirm shaft runout ≤0.1 mm; remove burrs/scale. - Lubricant: Use medium‑compatible lubricant (e.g., fluorine‑based for corrosives) to avoid contamination. Step‑by‑Step Assembly 1. Lubricate: Apply a thin, even film to seal faces, elastomer contacts, and shaft/sleeve installation area—no excess. 2. Gasket Prep: Fit gland/drive collar gaskets (use silicone grease to hold in place); avoid sharp tools . 3. Install Cartridge: Align with shaft; push evenly axially (no hammers); rotate shaft by hand while pushing to ensure smooth seating. 4. Gland Fastening: Mount gland to seal chamber; tighten bolts diagonally/alternately (finger‑tight first, then incrementally) to avoid warping . 5. Set Collar/Set Screws: Adjust drive collar gap per spec (e.g., 3/32” for 33–65 mm shafts); tighten set screws evenly (align with drilled holes if applicable) . 6. Release Locking Devices: Remove/rotate spacers/locking washers to clear the sleeve; do not skip this step . 7. Final Checks: Rotate shaft manually to confirm no binding; verify all fasteners are tight and seal faces are clean/free of debris . Post‑Assembly & Startup - Reassemble pump, align coupling, and check for pipe strain . - Perform a leak test (air/water) before introducing process media. - Start the pump slowly; monitor for leaks, unusual noise, or excessive temperature rise. Key Do’s & Don’ts - ✅ Do use only manufacturer‑approved lubricants and tools. - ✅ Do maintain axial alignment throughout installation. - ❌ Don’t strike the cartridge or seal faces with hard tools. - ❌ Don’t over‑tighten bolts/screws (risk of deformation/leakage). - ❌ Don’t mix incompatible lubricants with the process medium. Critical Notes - Follow the seal manufacturer’s manual for model‑specific settings (gap dimensions, torque values, and locking features). - For dual‑cartridge seals, ensure proper flush/barrier fluid connections before startup. 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