Warranty & After-Sales Service

1. Standard Machine Warranty

All Lingfeng bag making machines are supplied with a standard warranty period covering key mechanical and electrical components under normal operating conditions.

• Standard warranty period: 12 months after machine installation or shipment.
• Coverage includes manufacturing defects in mechanical components and electrical systems.
• Replacement parts for confirmed defects will be provided during the warranty period.
• Technical guidance and troubleshooting support are included.

The warranty does not cover damage caused by improper operation, unauthorized modifications, or external factors such as power instability, incorrect voltage connection, or unsuitable film material.

2. Installation Guidance and Operator Training

To ensure smooth production startup, we provide detailed installation guidance and training support.

• Remote installation and commissioning guidance by our engineering team, supported by step-by-step videos.
• Machine operation training for operators and technicians.
• Process setup assistance based on your bag specifications and film material (HDPE, LDPE, biodegradable PLA/PBAT, etc.).
• Maintenance and troubleshooting instructions.

On-site installation service may be arranged when required, depending on project scope and location.

3. Spare Parts Supply

Reliable spare parts supply is essential for maintaining stable bag production. Lingfeng Machinery maintains standardized parts documentation and supply channels for all machine series.

• Original spare parts available for all machine models, including sealing blades, heating elements, photoelectric sensors, and conveyor belts.
• Fast international shipping via DHL, FedEx, or UPS.
• Spare parts identification through detailed parts lists and drawings.
• Support for long-term equipment maintenance.

4. Remote Technical Support

Our technical team provides ongoing support to help customers quickly resolve operational issues.

• Email and WhatsApp technical support.
• Remote troubleshooting of mechanical, electrical, and PLC control issues.
• Machine parameter adjustment assistance for sealing temperature, bag length, and production speed.
• Process optimization recommendations when changing bag type or film material.

Most technical inquiries can be diagnosed and resolved remotely without production interruption.

5. Documentation and Technical Resources

Each machine project includes technical documentation to support installation, operation, and maintenance.

• Machine operation manuals.
• Electrical diagrams and schematics.
• Spare parts lists.
• Maintenance guidelines.

Additional documents may also be available through our Resource Center.

6. Long-Term Service Support

Even after the warranty period, Lingfeng Machinery continues to support customers throughout the life cycle of the equipment, with lifetime technical support for overseas customers.

• Long-term spare parts supply.
• Technical consultation for machine upgrades and retrofits.
• Production process improvement suggestions.
• Support for new bag products and production line expansion.

7. Contact Our Technical Team

If you require technical assistance, spare parts, or maintenance support, please contact our service team.