The pneumatic diaphragm pump is a cutting-edge conveying system and represents one of the most innovative pump technologies in China. It operates using compressed air as its power source, making it ideal for handling a wide range of challenging liquids—including corrosive, viscous, volatile, flammable, or highly toxic substances. This pump is capable of moving materials with particles, ensuring efficient and safe operation even in tough environments.
Available in four primary materials—plastic, aluminum alloy, cast iron, and stainless steel—the pump can be customized with different diaphragm materials such as nitrile rubber, neoprene, fluororubber, and PTFE (polytetrafluoroethylene), depending on the type of liquid being handled. This versatility allows it to be used in various special applications where traditional pumps may fail, delivering excellent performance in demanding conditions.
Like any mechanical device, pneumatic diaphragm pumps can experience issues over time. Here are some common problems and their possible causes:
1. **Reduced Flow Rate**: This often occurs when the diaphragm becomes stretched or deformed over time, reducing the effective volume of the pumping chamber. Additionally, wear or blockage of the inlet and outlet check valves (such as plastic balls) can lead to material being pushed back during discharge.
2. **Pump Not Moving**: Possible reasons include severe wear or sticking of the spool, damage to the shaft sleeve, loose end screws, broken diaphragms, or improper positioning of the pump (e.g., inverted or laid flat), which prevents the spool from returning to its original position.
3. **Weak Pumping Performance or Slow Speed**: This may be due to low air pressure, which should typically be between 4 to 7 kg. A faulty solenoid valve or damaged internal components like the air intake valve can also cause this issue. A clogged silencer, contaminated compressed air, or worn internal seals may further reduce efficiency.
4. **Impurities or Oil Stains in the Material**: This usually indicates a ruptured diaphragm, allowing foreign substances or oil to mix with the pumped material.
5. **Leakage at Inlet or Outlet**: This could be caused by loose screws, a deformed ball seat, damaged O-rings, or misalignment of the pump casing, leading to improper sealing at the ports.
Regular maintenance, proper installation, and using high-quality components can significantly extend the lifespan and reliability of a pneumatic diaphragm pump. Understanding these common issues helps users troubleshoot and maintain optimal performance.
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Suzhou Johnson Automation Technology Co., Ltd. , https://www.cn-johnson.com