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

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

Selecting the correct materials for a mechanical seal is crucial for reliability, longevity, and safety. The process involves matching the seal materials to the process fluid, operating conditions, and regulatory requirements. Below is a step-by-step guide. 1. Define the Application Requirements 1. Process Fluid: - Chemical composition (acids, bases, solvents, hydrocarbons, etc.). - Concentration and temperature. - Presence of solids (abrasives), gases, or dissolved oxygen. 2. Operating Conditions: - Pressure (inside the pump and ambient). - Temperature (minimum and maximum). - Shaft speed (RPM). - Shaft diameter and type (solid shaft or sleeve). 3. Regulatory & Safety Requirements: - FDA, USP, or other industry standards (for food, pharmaceutical, or biotech applications). - Emission limits (VOCs, hazardous fluids). 2. Select the Seal Face Materials The seal faces are the primary wear components and must resist both chemical attack and wear. Common combinations are: 1. Hard Face Materials: - Silicon Carbide (SiC): Excellent wear resistance, chemical resistance, and thermal conductivity. Ideal for most applications, especially with abrasive fluids. - Tungsten Carbide (WC): Good wear resistance, but less chemically resistant than SiC. Suitable for hydrocarbons and non-corrosive fluids. - Ceramic (Al₂O₃): Good chemical resistance, but brittle. Used in low to medium pressure, non-abrasive applications. 2. Soft Face Materials: - Carbon Graphite: Self-lubricating, good for many fluids. Used with hard faces (SiC, WC, ceramic). - PTFE/Carbon Composite: For highly corrosive fluids or FDA applications. Common Face Combinations: - SiC vs. Carbon Graphite (most general-purpose applications). - SiC vs. SiC (abrasive fluids, high wear). - WC vs. Carbon Graphite (hydrocarbons, low to medium abrasion). - Ceramic vs. Carbon Graphite (non-abrasive, corrosive fluids). 3. Select the Elastomer Materials Elastomers (O-rings, bellows, gaskets) must resist   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

Assembly of Chemical Cartridge Mechanical Seals Chemical cartridge mechanical seals are widely used in chemical processing due to their pre-assembled design, which simplifies installation and ensures sealing reliability. Below is a detailed, professional assembly process tailored to chemical application scenarios: 1. Pre-Assembly Preparation - Component Inspection: Check the cartridge seal for intactness—ensure no scratches, cracks, or debris on the seal faces (common materials like silicon carbide or tungsten carbide), and verify that elastomers (e.g., Viton for corrosives) are free of aging, swelling, or damage. Confirm all accessories (springs, set screws, gland plates) are complete and match the model. - Equipment Preparation: Clean the pump shaft, sleeve, and seal chamber thoroughly to remove chemical residues, scale, or solid particles, as contaminants can cause seal face damage. Measure shaft runout (must be ≤0.1mm) and surface roughness (Ra 0.2–0.4μm) to meet assembly requirements. Prepare compatible lubricant (consistent with the chemical medium, e.g., fluorine-based lubricant for strong corrosives) to avoid medium contamination. - Safety Precautions: Wear chemical-resistant gloves, goggles, and protective clothing, especially when handling toxic, corrosive, or flammable media. Ensure the work area is well-ventilated and equipped with emergency spill treatment tools. 2. Step-by-Step Assembly - Lubrication Treatment: Apply a thin, uniform layer of compatible lubricant to the seal faces, elastomer contact surfaces, and the pump shaft/sleeve where the seal installs. This reduces friction during assembly and prevents dry rubbing damage to the seal faces. - Cartridge Installation: Align the cartridge seal with the pump shaft, ensuring the seal chamber mating surface is clean and flat. Push the cartridge evenly along the axial direction—do not use hammers or hard tools to strike, as this can deform the seal face or damage internal springs. Rotate the shaft manually while pushing to ensure smooth installation without jamming. - Positioning and Fixing: Adjust the cartridge to the correct axial position according to the manufacturer’s specifications. Tighten the set screws or fixing bolts evenly in a crisscross pattern to avoid uneven force that could cause shaft misalignment. Ensure the compression amount of the internal spring meets requirements (typically 2–5mm, check with calipers if necessary). - Auxiliary System Connection: If the seal is equipped with a cooling, flushing, or barrier fluid system (common for double cartridge seals in chemical applications), connect the pipelines tightly. Ensure the flow direction and pressure of the fluid meet design standards—for example, the barrier fluid pressure should be 0.1–0.2MPa higher than the medium pressure to prevent medium leakage. 3. Post-Assembly Inspection and Test Run - Pre-Run Check: Rotate the pump shaft manually for 3–5 full rotations to confirm smooth operation without abnormal resistance. Inspect all connections for looseness, and check the seal chamber and pipeline for pre-leakage. - Test Run Procedure: Start the pump at low load first, monitoring the seal’s leakage rate (should be ≤5ml/h for liquid chemicals) and the temperature of the seal chamber (should not exceed the medium temperature by 20°C). Gradually increase to normal operating load, continuing to observe for abnormal noises, excessive temperature rise, or increased leakage. - Problem Handling: If leakage exceeds the limit or abnormal phenomena occur during the test run, stop the pump immediately. Check for improper installation (e.g., spring compression, shaft misalignment) or component damage, and rectify before restarting. I can help you create a customized assembly checklist for your specific chemical cartridge seal model, including detailed parameter requirements and safety notes for your applied chemical medium. Do you need me to formulate this personalized document?   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