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

The mechanical seals industry is driven by advancements in manufacturing and engineering, leading to increased demand for efficient and reliable sealing solutions. Key drivers include the growth of the oil and gas, chemical processing, and power generation industries, coupled with rising demand for leakage prevention and energy efficiency.   Opportunities exist in the development of innovative materials and designs to meet specific industry requirements. For instance, the demand for improved seal performance in harsh environments has led to the development of seals with high-temperature and chemical resistance. Additionally, the increasing adoption of automated systems creates opportunities for seals with self-monitoring and diagnostic capabilities.   Recent trends include the growing popularity of non-metallic materials in mechanical seals, such as engineered polymers and ceramics, offering advantages in corrosion resistance and reduced friction. The industry also sees increased adoption of magnetic couplings, eliminating the need for dynamic seals and enabling leak-free operation in critical applications. Furthermore, the integration of advanced sensing technologies in mechanical seals allows for predictive maintenance and improved reliability. 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

I. DAILY INSPECTION AND MAINTENANCE KEY POINTS - Operation Status Monitoring： Check for abnormal leakage at the seal position (minor leakage within ≤5 drops/min is acceptable). Observe whether the pump vibration, temperature, and noise are normal to avoid seal failure caused by working condition fluctuations. - Lubrication and Cooling System： Ensure smooth circulation of cooling media (such as water or oil) in the seal chamber. Regularly replace or replenish lubricating grease to prevent dry friction damage to the seal faces. - Seal Face Cleaning： Clean scale, oil stains, or particulate impurities from the seal end faces when the pump is shut down to avoid hard particles scratching the seal faces. II. KEY MAINTENANCE STEPS (PERFORM PERIODICALLY) 1. Dismantling and Inspection： - Dismantle the seal components in the order specified in the pump manual. Check if the dynamic and static rings show signs of wear, cracks, or corrosion. If obvious scratches (depth >0.1mm) appear on the seal faces, grind them or replace the components. - Inspect elastic elements (springs, O-rings) for aging, deformation, or failure, and replace seal parts promptly. 2. Installation Notes： - Apply a small amount of lubricant to the seal faces before installation to ensure the dynamic ring moves flexibly. Tighten bolts evenly to avoid uneven stress causing partial wear. - Adjust the seal compression amount to the value specified in the manual (typically 2-4mm). Excessive tightness accelerates wear, while looseness increases leakage. 3. Trial Operation Verification： Observe leakage, temperature, and vibration after starting the pump. Put it into use only after 30 minutes of normal operation. III. COMMON FAILURES AND COUNTERMEASURES - Excessive Leakage： Possible causes include worn seal faces, aged O-rings, or installation misalignment. Replace seal parts and re-calibrate the installation position. - Seal Overheating： Check if the cooling system is blocked, or if the spring is stuck, causing excessive tightness of the seal faces. Clean the pipeline and adjust the spring tension. - Abnormal Vibration： May be caused by shaft eccentricity, bearing wear, or skewed seal installation. Correct shaft alignment or replace bearings. IV. MAINTENANCE SUGGESTIONS FOR SPECIAL WORKING CONDITIONS - Seawater Environment： Select seal components made of corrosion-resistant materials (such as tungsten carbide, fluoroelastomer). Regularly flush the seal chamber with fresh water to prevent seawater crystallization corrosion. - High-Viscosity Media： Increase lubrication frequency to avoid media deposition causing seal face adhesion. Flush the seal chamber promptly after shutdown. V. MAINTENANCE RECORDS AND PREVENTIVE MANAGEMENT - Establish a maintenance log to record leakage volume, seal part replacement time, and fault handling for traceability of problem patterns. - Replace seal components according to the manual period (typically 1-2 years) to avoid sudden failures from overdue use. Regular maintenance can effectively extend the service life of mechanical seals and reduce downtime risks of marine pumps. For complex failures, consult professional maintenance personnel.   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

Pre - installation Checks Verify Components: Before installation, carefully check that all components of the mechanical seal are complete and in good condition. Refer to the assembly drawing to ensure that there are no missing or damaged parts. Examine the sealing surfaces of the friction pairs, sealing rings, etc. for any signs of damage, such as scratches or chips. Also, check the surfaces of the shaft or shaft sleeve, as well as the flanges that come into contact with packing and O - rings for any damage. Check Installation Dimensions: Ensure that the relevant dimensions of the equipment where the mechanical seal is installed meet the requirements. For example, the shaft run - out should be no greater than 0.06 mm at the location of the dynamic ring sealing ring, and the axial run - out of the shaft should not exceed ±0.5 mm. The concentricity tolerance of the gland (static ring seat) with respect to the shaft centerline is 0.05 mm, and the perpendicularity tolerance of the plane in contact with the gasket to the centerline is 0.03 - 0.05 mm.   Installation Process Avoid Installation Deviation: When tightening the gland, it should be done after the coupling is aligned. The bolts should be tightened evenly to prevent the gland end face from being skewed. Use a feeler gauge to check each point, and the error should not be greater than 0.05 mm. Check the fit clearance (i.e., concentricity) between the gland and the shaft or shaft sleeve outer diameter. It should be uniform all around, and the allowable error for each point checked with a feeler gauge is no greater than 0.01 mm. Proper Spring Compression: The spring compression should be carried out according to the specified value, and there should be no excessive or insufficient compression. The allowable error is 2.00 mm. Excessive compression will increase the face pressure and accelerate the wear of the sealing face, while insufficient compression will result in insufficient pressure to achieve a sealing effect. Ensure Free Movement of the Dynamic Ring: After installing the dynamic ring, when it is pressed against the spring, it should be able to rebound automatically. Installation of Sealing Rings: When installing the dynamic ring sealing ring on the shaft sleeve end and the static ring sealing ring on the gland (or housing) end, ensure that the ends are chamfered and smoothed. During the installation process, be careful not to damage the sealing rings and avoid contact with sharp objects.   Post - installation Checks Inspect Alignment and Clearance: After installation, re - check the alignment of the coupling and the clearance between the mechanical seal and the shaft or housing. Ensure that all values are within the specified range. Check for Leakage: Conduct a static pressure test on the mechanical seal before starting the equipment. Check if there is any leakage at the mechanical seal. If there is significant leakage, identify the cause and take measures to eliminate it. If the problem persists, disassemble and inspect the mechanical seal, and then reinstall it. 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  

FFKM stands for perfluoroelastomer. Here is an introduction About it: Definition and Composition FFKM is a special kind of perfluorinated polymer rubber. It is an elastic synthetic material made up of perfluorinated polymers, in which all hydrogen atoms in the polymer chain are replaced by fluorine atoms. Its composition mainly includes perfluorinated monomers like trifluoroethylene and tetrafluoroethylene, cross-linking agents to improve mechanical and structural stability, and fillers and additives such as carbon black and silica to adjust physical properties. Properties - Outstanding Chemical Resistance: FFKM can resist concentrated sulfuric acid, nitric acid, hydrochloric acid and other strong acids, strong alkalis like potassium hydroxide and sodium hydroxide solutions, and organic solvents including ketones, ethers, esters and aromatic hydrocarbons. It also shows high resistance to oxidizing agents such as hydrogen peroxide and ozone. - High Temperature Stability: FFKM can maintain its chemical and physical properties in extremely high or low temperatures, tolerating temperatures up to over 327 °C. It has excellent heat aging resistance, low volatility at high temperatures and can maintain good sealing performance. Its coefficient of thermal expansion is similar to that of many metals and engineering plastics. - Excellent Compression Resilience: FFKM has high elasticity, low compression deformation, high resilience and low compression set, which means it can quickly recover its original shape after being compressed or deformed, and maintain its shape and dimensional stability even under high pressure. Applications FFKM is widely used in various fields. In the semiconductor industry, its high cleanliness and resistance to plasma make it an ideal material for sealing. In the petrochemical industry, it can withstand high temperatures and corrosive media in oil and gas extraction and refining. In the automotive industry, it is used in engine sealing and fuel systems. It is also used in the aerospace, military, pharmaceutical and nuclear industries.