What should I do if the Split Case Pump leaks?
Apr 01, 2025
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Leakage problems in split case pumps may be caused by a variety of reasons, generally occurring in two locations: shaft seal leakage and pump body leakage. In this article, we will analyze the common causes and solutions for leakage in these two locations. In addition, we will also introduce some situations and solutions for leakage caused by operation and other reasons for your reference.
1. Shaft seal leakage
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Mechanical seal problem:
Reason: Aging or damage of mechanical seal auxiliary seal elements leads to seal failure.
Solution: Replace mechanical seals, especially corrosion-resistant pumps, and use high-temperature, acid- and alkali-resistant materials.
Solution: Replace mechanical seals, especially corrosion-resistant pumps, and use high-temperature, acid- and alkali-resistant materials.
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Packing seal problem:
Reason: The packing is compressed too tightly or too loosely, resulting in water leakage.
Solution: Adjust the packing gland bolts to make the packing moderately compressed to avoid over-tightening or over-loosening. If the packing is severely worn, replace it with a new packing.
Solution: Adjust the packing gland bolts to make the packing moderately compressed to avoid over-tightening or over-loosening. If the packing is severely worn, replace it with a new packing.
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Installation problem:
Reason: Improper tightening of bolts or incorrect installation.
Solution: Recheck and tighten all bolts to ensure that all parts are installed correctly.
Solution: Recheck and tighten all bolts to ensure that all parts are installed correctly.
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Sealing surface problem:
Reason: The sealing surface is uneven or the sealing surface material is not corrosion-resistant.
Solution: Repair the sealing surface or replace the corrosion-resistant sealing material.
Solution: Repair the sealing surface or replace the corrosion-resistant sealing material.
2. Pump body leakage
Reason: The pump body casting is of poor quality, with internal defects such as sand holes and air holes, or cracks in the casting.
Solution: Conduct a hydrostatic test, check and repair, or replace the leaking parts.
3. Other causes of leakage
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Improper operation：
Reason: The pump is unstable and the pressure fluctuates greatly.
Solution: Adjust the axial clearance, stabilize the operating pressure of the pump, and prevent intermittent leakage of the mechanical seal.
Solution: Adjust the axial clearance, stabilize the operating pressure of the pump, and prevent intermittent leakage of the mechanical seal.
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Other factors:
Reason: There are impurities, blockages or material residues in the pump body.
Solution: Remove impurities and blockages in the pump body to ensure that the pump cavity is clean.
Solution: Remove impurities and blockages in the pump body to ensure that the pump cavity is clean.
Based on the above analysis, the specific treatment method needs to be found and handled according to the actual situation. It is generally recommended to contact professional maintenance personnel or water pump manufacturer technicians for inspection and maintenance.