**Common Faults and Solutions for Pressure Reducing Valves**
1. **Pressure Reducing Valve Cannot Be Tightened to the Angle Valve**
- **Causes**: The handwheel of the pressure reducing valve slips, the inlet of the valve is not aligned with the angle valve, or the angle valve’s interface is damaged.
- **Solutions**: If the handwheel slips, repair or replace it. If the interfaces are misaligned, carefully realign them and slowly turn the valve counterclockwise to screw it on smoothly. If the angle valve is damaged, it must be replaced by a professional. Users should never attempt to fix this themselves. Instead, the entire LPG cylinder (along with the angle valve) should be sent to a certified maintenance center for proper handling.
2. **Leakage from the Pressure Reducing Valve**
- **Causes**: The upper and lower cover screws are not tightened properly, the internal rubber diaphragm is damaged, or the air inlet seal ring is aged or worn.
- **Solutions**: Tighten the screws, replace the damaged diaphragm, and always check the sealing ring when installing a new cylinder. This rubber ring ensures a tight connection between the valve and the cylinder. Over time, it can wear out or fall off, leading to gas leaks and potentially dangerous situations like fires or poisoning. Always inspect the seal before installation and replace it if necessary using a genuine replacement part. Never use makeshift materials or cut film as a substitute.
3. **Breathing Hole Blocked and Unable to Adjust**
- **Causes**: Lack of regular maintenance has caused debris to block the small 1mm hole in the upper casing. This breathing hole allows air to flow in and out of the diaphragm, which regulates pressure. If blocked, the diaphragm cannot function properly, causing high-pressure gas to flow directly into the appliance, resulting in sudden flame increases, fires, or gas poisoning.
- **Solutions**: Regularly clean the breathing hole to keep it open. If you notice gas leaking from the breathing hole, it likely means the diaphragm is damaged. Immediately close the angle valve, remove the pressure reducing valve, and replace the diaphragm or the entire valve.
4. **Abnormal Flow or Pressure**
- **Reduced Flow Rate**: This is often due to long-term use causing the rubber seals to expand or deform. If deformation occurs, replace the affected parts.
- **Low Inlet Pressure**: Usually caused by a clogged filter. Clean the filter regularly to maintain smooth gas flow.
*Source: Hebei Zhenxing Gas Pressure Regulator Co., Ltd.*
*Editor: Hardware Business Network Information Center*
*http://news.chinawj.com.cn*
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