english 
Gasoline Transfer Tank Discharge Valve Maintenance Guide
Proper maintenance of a gasoline transfer tank’s discharge valve is critical for safe operation, leak prevention, and fuel efficiency. Follow these steps to ensure optimal performance and longevity.
1. Regular Inspection
- Visual Checks: Look for cracks, corrosion, or wear on the valve body, seals, and threads.
- Leak Testing: Apply a soapy water solution to closed valves and check for bubbles indicating leaks.
- Operational Test: Open/close the valve multiple times to ensure smooth movement without sticking.
2. Cleaning & Debris Removal
- Flush the Valve: Use clean gasoline or a solvent to remove dirt, sediment, or varnish buildup.
- Compressed Air: Blow out debris from internal passages (if applicable).
- Avoid Water Contamination: Ensure no moisture enters the valve, as it can cause corrosion.
3. Lubrication & Seal Replacement
- Use Fuel-Resistant Grease: Apply a thin layer of PTFE-based or silicone lubricant to O-rings and moving parts.
- Replace Worn Seals: Swap out gaskets, O-rings, or packing seals every 1–2 years (or if leaks occur).
- Check Thread Integrity: Ensure threads are clean and undamaged before reassembly.
4. Preventative Measures
- Install a Dust Cap: Protect the valve outlet from dirt and moisture when not in use.
- Avoid Over-Tightening: Excessive force can damage seals or warp valve components.
- Use Compatible Materials: Ensure replacement parts (e.g., seals) are rated for gasoline and ethanol blends.
5. Emergency Repairs & Replacement
- Carry Spare Parts: Keep spare O-rings, gaskets, and valves for quick field repairs.
- Replace Faulty Valves Immediately: A stuck or leaking valve risks spills or vapor release.