1. Pre-Maintenance Safety Regulations
All maintenance operations must be performed after the equipment is powered off, gas cut off, pressure relieved and fully cooled down to ambient temperature. Implement the Lockout/Tagout (LOTO) procedure to prevent accidental startup.
Wear proper personal protective equipment including heat-resistant gloves, goggles and dust masks. Wear chemical protective clothing when handling chemical agents. Do not wear loose clothing or ornaments during operation.
PTFE has a maximum continuous operating temperature of 180℃ and a peak transient temperature not exceeding 200℃. Overheating and negative pressure operation are strictly prohibited. Do not use sharp metal tools to scratch PTFE linings and mould surfaces.
Classify and collect waste oil, rags, PTFE dust and cleaning waste liquid, and dispose of them as hazardous waste. Keep the working area well ventilated to avoid dust accumulation.
2. Daily Inspection (Per Shift)
Check the equipment body for loose components, abnormal noise and dust leakage; verify all anchor bolts are tightened.
Inspect transmission parts: ensure motor temperature rise is within the normal range and bearings run without abnormal sound. Check belt tension and surface condition.
Examine shaft seals for dust leakage and seal components for aging and hardening. Confirm electrical wiring is intact and grounding is reliable; temperature and speed indicators display correctly.
3. Periodic Maintenance
Weekly: Clean residual PTFE powder inside mixing paddles and material bins; retighten all connecting fasteners.
Monthly: Apply high-temperature grease to bearing housings; replace worn belts if necessary; calibrate temperature and speed parameters.
Quarterly: Disassemble and clean sealing assemblies, replace aged seals; inspect wearing parts such as paddles and repair or replace defective components.
Annually: Conduct motor insulation testing; perform rust removal and anti-corrosion treatment on the whole equipment; calibrate equipment levelness.
4. Trouble Shooting & Handling
Uneven mixing: Replace worn paddles, calibrate frequency converter for abnormal speed, or clean accumulated materials inside bins.
Dust leakage: Replace aged seals, tighten loose shaft sleeves or defective flange gaskets.
Motor overheating: Reduce feeding capacity for overload issues; clean and lubricate stuck bearings; troubleshoot unstable power supply.
5. Maintenance Records & Spare Parts Management
Record each inspection, maintenance and repair work completely, including equipment number, date, work type, detected faults, solutions, operator and inspector. All records shall be kept for no less than one year.
Keep sufficient stock of common spare parts such as seals, heating elements, sensors, hydraulic oil, PTFE gaskets and high-temperature grease. Inspect the status of key spare parts regularly.
6. Personnel Requirements
Maintenance personnel must be professionally certified and fully familiar with equipment structure, operating procedures and safety specifications. Organize regular technical training to ensure proficiency in PTFE characteristics, maintenance skills and fault handling methods.