Description

1. Professional Selection & Installation: Installation must be performed by certified elevator technicians. First, select the correct model based on the elevator’s speed and weight specifications: LD-HC-L3 (30mm stroke) for ≤1.0m/s, L7 (70mm) for ≤1.5m/s, L12 (120mm) for ≤2.0m/s, L17 (170mm) for ≤2.5m/s, and L19 (190mm) for ≤3.0m/s. Before installation, shut off the elevator’s main power supply and follow lockout-tagout protocols. Mount the buffer in the elevator pit’s designated position (aligned with the elevator car’s impact plate) using high-strength anchor bolts to ensure stability under impact. Verify that the buffer’s top surface is level and maintains the manufacturer-specified clearance from the car impact plate (typically 50-100mm). After installation, conduct a static compression test to confirm the buffer’s ability to return to its original shape without permanent deformation.

2. Routine Inspection & Maintenance: Maintenance teams should conduct monthly visual inspections and comprehensive performance checks semi-annually (as required by safety regulations). Visually inspect for physical damage: cracks, tears, or permanent deformation of the polyurethane material, corrosion on the steel core or casing, and loose mounting bolts. Check the buffer’s clearance from the car impact plate—any deviation from the specified range requires adjustment. Nanjing Zhuye Elevator Parts recommends conducting a dynamic impact test annually (using professional equipment) to verify energy absorption efficiency and compression recovery performance. Clean the buffer surface with a dry, lint-free cloth to remove dust and debris; avoid oil, grease, or chemical cleaners that could degrade the polyurethane material. Document all inspection results to demonstrate compliance with safety audit requirements.

3. Troubleshooting Safety Issues: If the buffer shows signs of permanent deformation, cracks in the polyurethane material, corrosion on the steel core, or failed impact tests, immediate action is required. First, verify if the buffer has been subjected to abnormal impacts (e.g., elevator overtravel). Inspect the mounting bolts for looseness or damage, which may affect stability during impact. For buffers with degraded polyurethane (brittleness, discoloration), replacement is mandatory as material deterioration compromises energy absorption. For persistent issues such as inconsistent compression recovery, contact Nanjing Zhuye Elevator Parts’ technical support team for expert guidance on safety-compliant troubleshooting.

4. Safety Precautions: Never modify, tamper with, or bypass the buffer—this violates safety regulations and endangers passenger lives. Do not perform maintenance while the elevator is in operation; always isolate power and use lockout-tagout procedures. Wear protective gloves, safety shoes, and eye protection when working in the elevator pit to avoid injury from falling debris or mechanical components. Use only manufacturer-approved tools and replacement parts to ensure compatibility and safety compliance.

1. Standard Replacement Cycle: Under normal operating conditions (8-12 hours of daily use in medium-traffic buildings), the LD-HC series has an average service life of 8-10 years. Nanjing Zhuye Elevator Parts recommends mandatory replacement every 9 years, regardless of visual condition, to comply with elevator safety standards and account for polyurethane material aging.

2. Factors Shortening Lifespan: High-traffic environments (airports, malls, transit hubs) with 14+ hours of daily operation or frequent abnormal impacts (due to elevator malfunctions) may require replacement every 5-7 years. Harsh operating conditions such as high humidity, extreme temperatures (below -10℃ or above 60℃), or exposure to oil, grease, or corrosive substances in the elevator pit can accelerate polyurethane degradation and steel core corrosion. Poor maintenance (infrequent cleaning, loose mounting) also shortens service life.

3. Key Signs for Replacement: Replace the buffer immediately if you observe permanent deformation of the polyurethane material, cracks or tears in the buffer body, corrosion on the steel core or casing, failed impact tests, loose or damaged mounting bolts, or if the buffer has exceeded the 9-year mandatory replacement period. Delaying replacement can result in non-compliance with safety audits, increased liability risks, and potential injury to passengers in the event of elevator overtravel.

4. Replacement Best Practices: Always use a genuine Elevator Polyurethane Buffer LD-HC-L3/L7/L12/L17/L19 from a trusted supplier like Nanjing Zhuye Elevator Parts to ensure safety compliance and compatibility. Before replacement, isolate the elevator power and document the existing buffer model and mounting configuration. Select the correct replacement model matching the elevator’s speed and weight specifications. Install the new buffer following the elevator manufacturer’s guidelines, verify clearance and levelness, and conduct static compression and dynamic impact tests to confirm performance. Dispose of the old buffer in accordance with local waste regulations (polyurethane materials may require specialized recycling).