The Yiling diaphragm pump adjusts its flow by modifying the piston stroke through a rotation adjustment mechanism. This mechanism works by rotating the handwheel, which is marked on a dial to indicate position changes. The handwheel's movement is converted into axial motion via an adjustable shaft and a sliding shaft. As the sliding shaft moves, a groove on it translates this axial motion into radial displacement of an eccentric component. This eccentric then pushes the piston through a connecting rod, allowing for precise flow control based on the piston’s stroke length.
Unlike other types of pumps, diaphragm pump maintenance requires special attention to several key components. Here are some important steps to follow during repair:
1. When inspecting the pump valves, check if the sealing rings are aged or deformed, whether the spring force has significantly weakened, and if the valve seat or core shows signs of wear or corrosion. Ensure that the valve end surface is flat and aligns properly with the pump body flange when installed.
2. When replacing the diaphragm, lift the pump head carefully before disassembly to avoid accidental drops that could cause damage.
3. During the disassembly of the adjustment mechanism, make sure to calibrate the stroke length (which should be set at 5mm). Remove the scale holder and slide the scale ring to the correct calibration position. The actual stroke must match the scale exactly to ensure accurate operation.
4. When removing the piston, use a specialized pointed tool to extract the packing ring from its groove without damaging the ring groove.
5. Inspect the worm and worm gear for any cracks, broken teeth, or poor meshing contact. Proper engagement is essential for smooth and reliable operation.
For more detailed information on diaphragm pump maintenance and operation, visit [China Hardware Business Network](http://news.chinawj.com.cn) or refer to the article titled "Yiling Diaphragm Pump Flow Adjustment and Repair Guide" at [http://NewsDetail270T2.html](http://NewsDetail270T2.html).
Written by: Hardware Business Network Information Center
Source: [China Hardware Business Network](http://news.chinawj.com.cn)
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