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Improper pump operation settings could also result in low pressure. Each pump has specific operational parameters, such as speed and stroke length, which need to be adhered to for optimal performance. Verify that the pump is operating within its specified range. If necessary, adjust the speed or stroke settings to achieve the desired pressure levels.
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Additionally, blockages in the discharge line can lead to reduced pressure. Over time, debris, scale, or other materials can accumulate, causing a restriction in flow. Regular maintenance and inspection of the discharge lines should be conducted to prevent blockages. If a blockage is suspected, testing the pump’s operation with the discharge line removed can help confirm if this is the issue.

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Lastly, the fluid being pumped can also affect pressure levels. Viscosity changes due to temperature fluctuations or contamination can cause significant impacts on pressure. If the fluid’s characteristics have changed, consider adjusting the pump to accommodate these variations or returning to a more suitable fluid type.
In conclusion, low pressure issues in plunger pumps can stem from various factors, including component wear, inadequate fluid supply, air entrainment, improper operational settings, line blockages, and fluid characteristics. By systematically inspecting and addressing these potential causes, you can effectively troubleshoot low pressure problems and ensure the reliable performance of your plunger pump. Regular maintenance and vigilance are key to preventing these issues from arising in the first place.