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

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

Mechanical seal failure is often caused by improper selection, incorrect installation, harsh operating conditions, or poor maintenance. Here are the most common causes: 1. Improper Material Selection - Incompatibility with the medium: Elastomers swell/corrode (e.g., using nitrile rubber in strong oxidants), or seal faces are worn/corroded by abrasive/corrosive fluids. - Mismatched temperature/pressure resistance: Materials exceed their limits, leading to deformation, aging, or cracking. 2. Installation and Assembly Errors - Damage to seal faces: Scratches from impurities or improper handling (e.g., hammering during installation). - Incorrect spring compression: Too much compression causes excessive wear; too little leads to insufficient sealing force and leakage. - Shaft misalignment or excessive runout: Shaft runout exceeding 0.1mm causes uneven contact between seal faces, accelerating wear. 3. Abnormal Operating Conditions - Dry running: Lack of lubrication between seal faces leads to instantaneous high temperature, burning or melting the faces. - Fluctuations in temperature/pressure: Sudden changes cause thermal shock or seal face deformation, breaking the sealing interface. - Solid particle contamination: Particles enter the seal face gap, causing scratches and abrasive wear. 4. Poor Maintenance and Management - Neglected leakage monitoring: Failure to detect excessive leakage in time leads to further damage. - Improper cooling/lubrication: Insufficient cooling fluid flow or high temperature causes seal overheating. - Aging of components: Elastomers, springs, or other parts degrade over time without timely replacement. I can help you conduct a targeted failure cause analysis based on your specific mechanical seal model, operating parameters, and failure phenomena (e.g., leakage type, seal face damage status). Do you need this professional analysis service?   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

Installation and Maintenance of Mechanical Seals 一、Standard Installation Procedures 1. Pre-Installation Preparation: Inspect the seal for damage (e.g., scratches on seal faces, aging of elastomers) and clean all components (shaft, sleeve, seal chamber) to remove impurities. Verify that shaft runout is within 0.1mm and the surface roughness of the shaft/sleeve mating with the seal is Ra 0.2–0.4μm. 2. Assembly Operations: Apply a thin layer of compatible lubricant (consistent with the medium) to the seal faces, elastomers, and shaft surface. Install elastomers first, then press the seal cartridge evenly onto the shaft without hammering to avoid damaging the seal faces. Ensure the seal is axially positioned correctly and the compression amount of the spring meets the manufacturer’s specifications (typically 2–5mm). 3. Post-Installation Check: Rotate the shaft manually to confirm smooth operation without jamming. Connect the cooling/barrier fluid system (if applicable) and check for leaks in the pipeline. 二、Key Maintenance Measures 1. Regular Inspection: Periodically monitor the leakage rate (should be ≤5ml/h for liquids), operating temperature (seal chamber temperature should not exceed the medium temperature by 20°C), and abnormal noises. Record operating data to track performance changes. 2. Lubrication and Cooling Management: Maintain stable supply of cooling/barrier fluid, ensuring the flow rate and temperature meet requirements (e.g., cooling water temperature ≤35°C). Avoid dry running of the seal, which can cause instantaneous burnout of the seal faces. 3. Replacement Criteria: Replace the seal immediately if leakage exceeds the limit, the seal face is severely worn/cracked, or elastomers show swelling, aging, or cracking. After replacement, conduct a test run under low load to confirm normal operation. 4. Storage Requirements: Unused seals should be stored in a dry, clean environment at room temperature, avoiding direct sunlight and contact with corrosive substances. Seal faces should be protected with anti-corrosion film to prevent damage. 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 key performance parameters of mechanical seals directly determine their adaptability and reliability in specific applications, with the following core indicators: 1. Operating Temperature Range Reflects the seal's tolerance to fluid temperature, typically ranging from -200°C (for cryogenic media like liquid nitrogen) to 500°C+ (for high-temperature fluids like steam). Exceeding the range will cause elastomer aging, seal face deformation, or even failure. 2. Maximum Operating Pressure The maximum pressure the seal can withstand under rated conditions, ranging from vacuum (for low-pressure systems) to 40MPa+ (for high-pressure pumps/compressors). Pressure affects seal face contact force; insufficient or excessive force leads to leakage or accelerated wear. 3. Speed Limit The maximum rotational speed compatible with the seal, related to shaft diameter and seal structure. It ranges from low-speed (3000rpm for centrifugal compressors). Excessive speed causes heat accumulation and seal face damage. 4. Leakage Rate The amount of fluid leaking through the seal interface, a critical indicator of sealing performance. For liquids, it’s usually

1. Pre-Installation Prep: Clean the shaft, seal cavity, and cartridge; check for shaft runout (≤0.05mm) and surface scratches. 2. Cartridge Mounting: Slide the cartridge onto the shaft, align the seal cavity flange, and hand-tighten bolts evenly. 3. Set Axial Clearance: Rotate the shaft to seat the seal faces, use a feeler gauge to adjust clearance to manufacturer’s specs (typically 0.3-1mm). 4. Lock Position: Tighten flange bolts per torque requirements, then secure the cartridge’s anti-rotation pin. 5. Final Checks: Rotate the shaft manually to ensure smooth operation; verify lubrication/cooling circuit connectivity 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

Mechanical seal installation steps (core: clean, align, protect seal faces, control preload) are as follows, suitable for common single-face internal-mounted seals: 1. Pre-installation preparation & cleaning - Confirm the seal model matches the equipment (shaft diameter, pressure, medium), and check parts for defects (no scratches on seal faces, spring intact, O-rings elastic). - Thoroughly clean the shaft surface, seal chamber, and mounting parts (remove rust, debris, old seal residue) to avoid damaging seal faces. - Apply compatible lubricant (e.g., clean oil for oil media, glycerin for water media) to the shaft, O-rings, and seal face (prevent dry friction during installation). 2. Assemble the seal assembly - Install auxiliary seals (O-rings, V-rings) onto the moving ring or stationary ring: avoid twisting, stretch slightly to fit smoothly (do not use sharp tools to prevent cutting). - Install the spring/bellow onto the moving ring seat, ensuring it’s correctly positioned (no jamming, uniform force distribution). - Lightly fit the moving ring and stationary ring (seal faces face each other) to check for smooth contact (no jamming or tilting). 3. Install the seal into the equipment - Slowly slide the assembled seal onto the shaft: keep the seal coaxial with the shaft, avoid forcing or tilting (prevent scratching seal faces or O-rings). - Fix the stationary ring to the seal chamber: tighten the set screws evenly (do not over-tighten to avoid deforming the stationary ring). - Ensure the moving ring can move axially freely (spring compression is adjustable, no jamming from foreign objects). 4. Adjustment & final inspection - Check the spring compression: follow the manufacturer’s specifications (too loose → poor sealing; too tight → excessive wear). Rotate the shaft by hand to confirm smooth operation (no stuck or abnormal resistance). - Recheck coaxiality: ensure the shaft has no obvious eccentricity or runout (use a dial indicator if needed, runout ≤0.05mm for general pumps). - Wipe off excess lubricant, and confirm no debris is left in the seal chamber. 5. Post-installation test - Conduct a static leak test: fill the seal chamber with the medium (or clean water) and check for leakage at the seal face and auxiliary seals. - Start the equipment at low speed first: observe for abnormal noise, vibration, or leakage. Gradually increase to normal speed, and monitor for 10–30 minutes (stable operation with no continuous dripping is qualified). 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  

Common failures of mechanical seals mainly focus on leakage, abnormal wear, and functional failure, with clear causes and characteristics: 1. Leakage (most frequent failure) - Main manifestations: Continuous dripping or seepage at the seal face, or leakage from auxiliary seal rings (O-rings, V-rings). - Core causes: Seal face damage (scratches, cracks), improper spring pressure (too loose/tight), auxiliary seal aging (hardening, deformation), or shaft eccentricity. 2. Seal face wear/abrasion - Main manifestations: Rough, frosted, or grooved seal faces (moving/stationary rings), leading to reduced sealing performance. - Core causes: Solid particles in the medium (abrasive wear), insufficient lubrication (dry friction), or mismatched material hardness (e.g., soft graphite paired with unpolished hard materials). 3. Spring failure - Main manifestations: Spring deformation, breakage, or jamming (failure to provide stable axial pressure). - Core causes: Corrosion (from aggressive media), fatigue (long-term high-speed operation), or foreign matter blocking the spring cavity. 4. Auxiliary seal ring damage - Main manifestations: Sealing ring cracking, swelling, or losing elasticity. - Core causes: Incompatible with the medium (e.g., oil swelling rubber), excessive temperature (high temp hardens/softens seals), or improper installation (twisting during assembly). 5. Vibration/noise abnormal - Main manifestations: Abnormal noise (squeaking, grinding) or excessive vibration at the seal, accompanied by accelerated wear. - Core causes: Shaft misalignment, poor surface finish of the seal face, or loose fit between the moving ring and the shaft. 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 replacement frequency depends on operating conditions, seal type, and application, with no fixed universal interval. General Replacement Guidelines 1. Based on Operating Hours - Under ideal conditions (stable parameters, clean/compatible fluids): 10,000–20,000 operating hours (roughly 1–2 years for continuous operation). - Under harsh conditions (high temp/pressure, abrasive/corrosive fluids, frequent start-stops): 1,000–5,000 operating hours (may need replacement every 3–6 months). 2. Based on Condition Monitoring - Replace immediately if failure signs appear (e.g., excessive leakage, abnormal noise, elevated temperature). - Proactively replace during scheduled equipment overhauls if seals show wear (e.g., scratched faces, degraded O-rings) even if no obvious failure. 3. Manufacturer’s Recommendations - Prioritize the seal manufacturer’s guidelines, as they specify intervals tailored to the seal’s design, materials, and intended use. 4. Preventive Replacement - For critical equipment (where unexpected failure causes heavy losses), replace seals before reaching their maximum service life—e.g., at 70–80% of the recommended 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

Preventing mechanical seal failure centers on controlling operating conditions, ensuring proper installation, and conducting proactive maintenance. Core Prevention Measures 1. Stabilize Operating Conditions - Keep pressure, temperature, and rotational speed strictly within the seal’s design limits to avoid thermal deformation or excessive wear. - Prevent dry running: Ensure continuous, clean fluid supply for lubrication and cooling (install low-flow alarms if needed). - Minimize pressure surges or fluctuations with buffer systems (e.g., pressure regulators) to avoid seal face separation. 2. Ensure Fluid Cleanliness & Compatibility - Install high-efficiency filters (to remove particles ≤25μm) to prevent abrasive wear on seal faces. - Verify fluid compatibility with seal materials (e.g., avoid corrosive fluids with non-resistant elastomers like nitrile). - Maintain proper fluid viscosity; avoid overly thin or thick fluids that reduce lubrication. 3. Follow Proper Installation Procedures - Adhere to the manufacturer’s guidelines: Ensure correct alignment of the seal, shaft, and housing (misalignment causes uneven wear). - Use specified torque values for fasteners—over-tightening damages seal faces, while under-tightening leads to leaks. - Keep seal components clean and free of scratches during installation (even small defects on seal faces cause leaks). 4. Implement Proactive Maintenance - Conduct daily visual checks for leaks, abnormal noises, or temperature rises. - Perform scheduled inspections (per manufacturer recommendations or operating conditions) to replace worn parts (e.g., O-rings, springs) before failure. - Replace aging components proactively—elastomers degrade over time even without obvious damage. 5. Address Abnormalities Promptly - Shut down equipment immediately if dry running, severe vibration, or sudden temperature spikes occur. - Investigate and resolve root causes (e.g., clogged filters, fluid contamination) instead of temporary fixes. 6. Select the Right Seal - Choose a seal model matched to the application (e.g., high-temperature seals for hot fluids, corrosion-resistant seals for acidic media) to avoid mismatched performance.   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 core signs of mechanical seal failure are visible leaks and abnormal equipment performance. Key Failure Signs 1. Leakage - Obvious dripping or streaming of fluid from the seal area (exceeds the normal acceptable rate, usually >5 droplets per minute). - Accumulation of fluid or stains around the seal and adjacent components. 2. Abnormal Sounds/Vibrations - Unusual grinding, squealing, or rattling noises from the seal region, indicating worn or misaligned seal faces. - Increased equipment vibration, often caused by seal damage leading to unstable operation. 3. Elevated Temperature - Higher-than-normal temperature at the seal housing, resulting from insufficient lubrication, dry running, or excessive friction between seal faces. 4. Reduced Equipment Efficiency - Drop in pump pressure, flow rate, or compressor output, as seal leakage affects system performance. - Increased energy consumption due to the seal’s increased resistance. 5. Visual Damage - Visible wear, scratches, or cracks on the seal faces when inspected after disassembly. - Deterioration (swelling, hardening, or tearing) of elastomeric components like O-rings or gaskets.   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