The pneumatic diaphragm pump is an innovative and advanced conveying system, representing one of the most cutting-edge 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, and highly toxic substances. This pump can efficiently transport materials that traditional pumps are unable to manage, making it a versatile solution for various industrial applications.
Available in four main materials—plastic, aluminum alloy, cast iron, and stainless steel—the diaphragm pump is designed to suit different environments and material requirements. The choice of diaphragm material (such as nitrile rubber, neoprene, fluororubber, or PTFE) depends on the type of liquid being pumped, ensuring optimal performance and durability. This flexibility allows users to customize the pump according to their specific needs, whether it's for chemical processing, wastewater treatment, or other specialized operations.
Despite its reliability, the pneumatic diaphragm pump may encounter some common issues during operation. Here’s a detailed breakdown of typical problems and their possible causes:
1. **Reduced Flow Rate**: This issue often occurs due to prolonged stretching or deformation of the diaphragm, which reduces the volume of the pumping chamber. Additionally, wear or damage to the inlet and outlet check valves (often plastic balls) can cause blockages from debris or large particles, leading to backflow during discharge.
2. **Pump Not Moving**: Several factors can cause the pump to stop working. These include severe wear or sticking of the spool, worn shaft sleeves requiring replacement, loose or missing end screws, broken diaphragms, or improper positioning such as the pump being upside down or laid flat, which prevents the spool from returning to its original position.
3. **Weak Pumping Performance or Slow Speed**: This can be caused by low air pressure, which should typically be between 4 to 7 kg. Check the intake pressure gauge and ensure the gas source valve is fully open. If a solenoid valve is used, inspect the plastic components for damage that might prevent full opening. A clogged silencer can also slow down the pumping speed. Excessive moisture or impurities in the compressed air may enter the pump and block the valve mechanism. Additionally, damaged end caps or worn internal seals can lead to air leakage and reduced efficiency.
4. **Contamination 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**: Common causes include loose screws, deformed ball seats, or damaged O-rings. Improper alignment of the pump casing can also result in misalignment of the ports, causing leaks.
By understanding these potential issues, operators can perform regular maintenance and troubleshooting to ensure the smooth and efficient operation of the pneumatic diaphragm pump.
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Suzhou Johnson Automation Technology Co., Ltd. , https://www.cn-johnson.com