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

Selecting the correct mechanical seal hinges on matching its specifications to your application’s core parameters—including the fluid handled, operating conditions, and equipment design—to ensure long-term reliability and leakage prevention. Follow this 5-step framework to make an accurate selection: 1. Define the Fluid (Medium) Characteristics The fluid being sealed is the most critical factor, as it directly impacts material compatibility and seal design. - Chemical Compatibility: Confirm the seal’s materials (seal faces, elastomers, metal components) resist corrosion, swelling, or degradation by the fluid. For example: - Use PTFE elastomers for strong acids/alkalis. - Choose silicon carbide (SiC) seal faces for abrasive fluids (e.g., slurries) to avoid rapid wear. - Physical State: Differentiate between liquids, gases, or volatile fluids. Gases often require seals with tighter clearances or secondary sealing elements to prevent leakage. - Viscosity & Solids Content: High-viscosity fluids may need larger spring forces for face contact; fluids with solids (e.g., slurries) require robust, clog-resistant designs (e.g., unbalanced seals with wide gaps). 2. Match to Operating Conditions Seal performance is heavily influenced by temperature, pressure, and speed—ensure these align with the seal’s rated limits. - Temperature: Select seals rated for your fluid’s operating and startup/shutdown temperatures. For high-temperature applications (>200°C), use graphite-filled PTFE or metal bellows instead of standard elastomers. - Pressure: Choose between balanced (for high pressure, >10 bar) or unbalanced seals (for low pressure,

Avoiding installation mistakes is critical to preventing premature seal failure, leakage, and equipment damage. The key is to eliminate errors in preparation, precision alignment, and operational checks. Below are the 8 most common mistakes and how to avoid them: 1. Skipping Compatibility and Condition Checks - Mistake: Installing the seal without verifying if its model, size, and material match the equipment’s temperature, pressure, and medium. Also ignoring pre-installation inspections for seal defects (e.g., cracked faces, deformed O-rings) or shaft/chamber damage (e.g., scratches, burrs). - Avoidance: Always cross-check the seal’s specifications against the application requirements. Inspect all components (seal, shaft, chamber) for damage before installation. 2. Poor Cleanliness Leading to Contamination - Mistake: Allowing dirt, metal shavings, or residual media to remain on the seal faces, shaft, or seal chamber. Even tiny particles can scratch the sealing interface or cause binding. - Avoidance: Clean all parts with a lint-free cloth and compatible solvents (non-corrosive to seal materials). Ensure the installation area is dust-free. 3. Ignoring Coaxiality and Shaft Runout - Mistake: Failing to check the shaft’s runout (eccentricity) at the seal position. Excessive runout (beyond the seal’s limit, usually ≤0.1mm) causes uneven face wear and leakage. - Avoidance: Use a dial indicator to measure shaft runout. If it exceeds the limit, repair or replace the shaft before installing the seal. 4. Incorrect Seal Compression - Mistake: Over-compressing (causes excessive friction and heat) or under-compressing (fails to form a tight seal) the seal’s elastic components (O-rings, springs). This is often due to not following the manufacturer’s torque or gap guidelines. - Avoidance: Strictly adhere to the manufacturer’s instructions for compression. For cartridge seals, remove setting clips only after final tightening. 5. Uneven Gland Bolt Tightening - Mistake: Tightening gland bolts in a random order (not crisscross) or with uneven torque. This distorts the seal chamber, misaligns the seal faces, and breaks the sealing interface. - Avoidance: Use a torque wrench and tighten bolts in a crisscross pattern (e.g., 1-3-2-4 for 4 bolts) to apply uniform pressure. Follow the recommended torque value. 6. Tilting or Misaligning Seal Faces - Mistake: Installing component seals with the stationary and rotating faces tilted (not parallel) or misaligned. This destroys the thin lubricating film between the faces, leading to dry friction and rapid wear. - Avoidance: When assembling component seals, ensure faces are perfectly parallel. Use alignment tools if needed, and avoid forcing the seal into place. 7. Forgetting Post-Installation Manual Rotation - Mistake: Starting the equipment immediately after installation without manually rotating the shaft. Binding or tight spots (caused by misalignment or debris) can damage the seal once the machine runs. - Avoidance: Manually rotate the shaft 2-3 full turns after installation. It should feel smooth—if there’s resistance, disassemble and recheck. 8. Rushing Startup Without Leakage/Temperature Checks - Mistake: Starting the equipment at full speed right away and not monitoring initial performance. Immediate leakage or overheating (seal face temp >80°C for standard seals) can go unnoticed, leading to severe failure. - Avoidance: Start the machine at low speed first, then gradually increase to normal. Monitor for leakage (no visible drops) and face temperature. Stop immediately if issues arise.   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

Ensuring correct mechanical seal installation relies on strictly following technical specifications, maintaining precision during assembly, and eliminating contamination or misalignment risks—these are the keys to avoiding premature seal failure. The installation process can be divided into 3 critical phases with actionable steps: 1. Pre-Installation Preparation: Lay the Foundation Thorough preparation prevents most installation errors before assembly even begins. - Verify Compatibility: Cross-check that the seal model, size, and material (seal faces, elastomers) fully match the equipment and工况 (temperature, pressure, medium) requirements. - Clean All Components: Use a lint-free cloth and compatible cleaning agents (avoid corrosive solvents) to clean the seal, shaft, seal chamber, and gland. Even tiny particles can scratch seal faces or cause misalignment. - Inspect for Damage: Check the seal for defects—such as cracks on seal faces, deformations in O-rings, or broken springs. Also, ensure the shaft surface is smooth (no scratches, burrs) and the seal chamber is free of wear. 2. Precision Assembly: Control Key Installation Parameters This phase requires attention to detail to ensure the seal is seated correctly and aligned. - Ensure Coaxiality: Use a dial indicator to measure the shaft’s runout (eccentricity) at the seal installation position. The error should not exceed the seal’s specified limit (typically ≤0.1mm) to avoid uneven face wear. - Set Proper Compression: Follow the manufacturer’s instructions to adjust the seal’s compression (for elastomers or springs). Over-compression causes excessive friction and heat; under-compression leads to leakage. For cartridge seals, ensure the setting clips are removed only after final tightening. - Align the Seal Faces: When installing component seals, ensure the stationary and rotating seal faces are perfectly parallel. Avoid tilting the seal during installation, as this will destroy the sealing interface. - Tighten Bolts Evenly: Use a torque wrench to tighten the gland bolts in a crisscross pattern (e.g., 1-3-2-4 for 4 bolts) to apply uniform pressure. Uneven tightening can distort the seal chamber and misalign the faces. 3. Post-Installation Verification: Confirm Installation Quality Final checks ensure the seal is ready for safe operation. - Manual Rotation Test: After installation, manually rotate the shaft 2-3 full turns. It should feel smooth with no tight spots or resistance—this indicates no binding between seal components. - Leakage and Temperature Check: Start the equipment at low speed first, then gradually increase to normal operating conditions. Monitor the seal for immediate leakage (no visible drops should form) and check the seal face temperature (it should stay within the manufacturer’s recommended range, usually ≤80°C for standard seals). - Record Installation Data: Document the seal model, installation date, torque values used, and initial test results. This helps track performance and troubleshoot issues later.     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 mechanical seal hinges on systematically matching the seal's specifications to your application's exact operating conditions, ensuring optimal performance and longevity. The selection process can be broken down into 5 core steps: 1. Define Key Operating Parameters: First, clarify the fundamental working conditions of the equipment. - Temperature: Note both the normal and maximum/minimum temperatures of the sealed medium, as this dictates the material compatibility of seal faces and elastomers. - Pressure: Determine the operating pressure and any pressure fluctuations within the seal chamber to select a seal structure capable of withstanding such forces. - Speed: Calculate the rotational speed (in rpm) of the shaft, as higher speeds may require specialized designs to manage heat and centrifugal forces. 2. Analyze the Sealed Medium Properties: The medium’s characteristics directly influence material selection. - Chemical Compatibility: Assess if the medium is corrosive (e.g., acids, alkalis), abrasive (e.g., slurries with particles), or viscous (e.g., oils). Choose materials like silicon carbide for abrasion resistance or fluoropolymers for chemical resistance. - Solid Content: If the medium contains particles, opt for seals with built-in flushing or filtering systems to prevent seal face damage. - Volatility: For volatile or low-lubricity media, select seals designed to maintain a stable lubricating film between faces. 3. Choose the Appropriate Seal Type: Select a seal design based on your equipment and application requirements. - Single vs. Double Seal: Use single seals for clean, non-hazardous media; double seals (with a barrier fluid) for toxic, flammable, or highly corrosive media to prevent leakage. - Cartridge vs. Component Seals: Cartridge seals are pre-assembled for easy, error-free installation, ideal for quick replacements. Component seals offer more flexibility but require precise on-site assembly. 4. Select Compatible Materials: Match the seal’s material components to the application. - Seal Faces: Common options include carbon-graphite (good for general use), silicon carbide (high hardness, abrasion-resistant), and tungsten carbide (excellent for high pressure). - Elastomers: Choose O-rings or gaskets made of nitrile rubber (for oils, water) or Viton (for high temperatures and chemicals). - Metal Parts: Select stainless steel for general corrosion resistance or Hastelloy for extreme chemical environments. 5. Consider Equipment and Installation Constraints: Ensure the seal fits within your system’s physical and operational limits. - Shaft Size and Tolerances: Confirm the seal’s inner diameter matches the shaft size, and check for acceptable shaft runout or eccentricity. - Space Limitations: If the seal chamber has limited space, opt for compact seal designs. - Maintenance Access: For hard-to-reach equipment, prioritize seals with long service lives or easy-to-maintain cartridge designs.     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

To extend the service life of mechanical seals, it is necessary to control the entire process of selection, installation, operation and maintenance. The core is to ensure that the seals always operate stably under suitable working conditions and minimize abnormal wear to the greatest extent. Specific measures can be taken from the following four key links: 1. Accurate Selection is the Foundation: Selecting seals that match the actual working conditions is a prerequisite for extending their service life. - Medium Adaptation: Choose corrosion-resistant materials (such as fluororubber, silicon carbide) or seals with particle flushing structures based on the corrosiveness, viscosity, and solid content of the medium. - Parameter Matching: Select the corresponding seal structure and elastic components according to the operating temperature and pressure of the equipment to avoid seal failure due to over-temperature or over-pressure. 2. Standardized Installation is the Key: Incorrect installation will directly shorten the seal life. Attention should be paid during installation: - Ensure Coaxiality: The coaxiality error between the seal shaft and the seal chamber should be controlled within the specified range (usually ≤ 0.1mm) to avoid uneven end face wear caused by eccentricity. - Control Compression Amount: Strictly adjust the compression amount of the seal according to the instructions. Excessive compression will increase frictional heat generation, while insufficient compression will fail to form an effective seal. - Cleanliness and No Impurities: Thoroughly clean the seal chamber, shaft sleeve and other components before installation to prevent impurities from entering the seal end face and causing scratch wear. 3. Optimizing Operating Conditions is the Core: Reduce the working load of the seals by improving the operating environment. - Control Medium State: Avoid sudden changes in medium temperature and pressure. For media containing particles, install filtering or flushing devices to reduce the scouring of particles on the seal face. - Avoid Dry Friction: Ensure the seal chamber is filled with medium before starting the equipment, or use auxiliary systems (such as liquid priming, heating) to prevent dry grinding of the seal end face. 4. Regular Maintenance is the Guarantee: Establish a sound maintenance mechanism to promptly identify and solve potential problems. - Daily Inspection: Regularly check the leakage amount and temperature of the seals. If increased leakage or overheating of the end face is found, stop the machine for inspection in time. - Regular Replacement of Wear Parts: Replace the elastic components (such as O-rings, springs) of the seals in advance according to the service cycle to avoid deterioration of seal performance due to elastic failure. - Record Operating Data: Record the service time and working condition changes of the seals to provide reference for subsequent selection and maintenance.     Jiaxing Burgmann Mechanical Seal Co., Ltd Email: doris@mechanicalseal.com.cn Skype: kathysunlin Fax: 86-573-84072317 Mob: 86-15381220188 WhatsApp: 8615958372402 Website: www.industrial-mechanicalseals.com Add: A-5 Wanyangzhongchuangcheng, Ganyao Town, Jiashan county, Jiaxing, Zhejiang, China. 314107

The length of the service life of mechanical seals varies depending on multiple factors. - Key influencing factors include: 1. Operating conditions: Such as the pressure, temperature, and speed of the equipment where the seal is installed. Higher pressure or temperature usually shortens the service life. 2. Fluid properties: Corrosive, viscous, or particle-containing fluids can accelerate seal wear and reduce its service life. 3. Installation and maintenance: Improper installation (e.g., incorrect alignment) or lack of regular maintenance (e.g., insufficient lubrication) will significantly shorten the service life; proper operation can extend it. In general, under normal working conditions and with good maintenance, the service life of mechanical seals can range from several thousand to over ten thousand operating hours.     Jiaxing Burgmann Mechanical Seal Co., Ltd Email: doris@mechanicalseal.com.cn Skype: kathysunlin Fax: 86-573-84072317 Mob: 86-15381220188 WhatsApp: 8615958372402 Website: www.industrial-mechanicalseals.com Add: A-5 Wanyangzhongchuangcheng, Ganyao Town, Jiashan county, Jiaxing, Zhejiang, China. 314107

- High temperature resistance: Can operate stably in high-temperature environments, suitable for applications involving hot media. - Pressure resistance: Excellent performance under high pressure, ensuring effective sealing without leakage. - Corrosion resistance: Made of metal materials with good corrosion resistance, adaptable to various corrosive media. - Long service life: The metal bellows structure is durable, reducing the frequency of replacement and maintenance. - Compensation ability: The bellows can provide automatic compensation for axial displacement, ensuring stable sealing performance even with equipment vibration or wear. - Wide application range: Suitable for various rotating equipment such as pumps, compressors, and agitators in industries like chemical, petroleum, and power.       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 are typically selected in the following situations: - When handling hazardous, toxic, or flammable media, as they provide a higher level of leakage prevention compared to single seals, reducing the risk of harmful substances escaping. - For corrosive fluids, the double seal design allows for the use of a buffer or barrier fluid (compatible with the process fluid) to protect the seal faces from direct contact with highly corrosive media. - In applications involving high pressure or high temperature, double seals offer better stability and durability, as the buffer/barrier fluid can help dissipate heat and balance pressure. - When dealing with volatile or valuable liquids, they minimize leakage loss, ensuring more efficient use of the medium. - In scenarios where strict environmental regulations must be met, the enhanced sealing performance helps comply with emission standards.   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. Excellent temperature resistance: Capable of withstanding both high and low temperature extremes, making them suitable for applications involving hot fluids or cryogenic media. 2. High pressure resistance: The robust metal construction allows them to handle high-pressure operating conditions effectively. 3. Reduced maintenance needs: They often have a longer service life due to their durable design, minimizing the frequency of replacements and maintenance. 4. Good corrosion resistance: When made from corrosion-resistant alloys (such as stainless steel, Hastelloy, etc.), they can resist attack from aggressive media. 5. Compensatory ability: The bellows structure provides axial compensation, accommodating shaft endplay, thermal expansion, and wear without compromising sealing performance. 6. No need for secondary sealing: The integral metal bellows design eliminates the need for additional dynamic secondary seals (like O-rings), reducing potential leak points. 7. Suitable for clean services: Their design is less prone to trapping particles, making them ideal for applications requiring high cleanliness, such as in the pharmaceutical or food industries.   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 and seal chamber are clean and free of burrs or damage. 2. Check that the cartridge assembly is intact and matches the specified model. 3. Slide the cartridge onto the shaft, making sure it is properly aligned with the seal chamber. 4. Tighten the set screws or clamping bolts evenly to secure the cartridge in place. 5. Connect the cooling or lubrication lines as required by the system. 6. Perform a final check to ensure all components are properly positioned and secured before starting the 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

According to a report by Technavio, the global mechanical seals market is expected to grow by USD 1.72 billion from 2024 to 2028, with a compound - annual - growth rate (CAGR) of over 5.55%. The growth of the aftermarket sales of mechanical seals is the main driving force, and the additive manufacturing technology shows a developing trend. However, the fluctuating prices of raw materials such as steel pose a challenge to the market.   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

According to a report by Technavio, the global mechanical seals market is expected to grow by USD 1.72 billion from 2024 to 2028, with a compound - annual - growth rate (CAGR) of over 5.55%. The growth of the aftermarket sales of mechanical seals is the main driving force, and the additive manufacturing technology shows a developing trend. However, the fluctuating prices of raw materials such as steel pose a challenge to the market.     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