Material Drying
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PPO Pump and Valve Fluid Part Selection
Problem Phenomenon
[Problem Phenomenon] Materials for fluid handling parts such as pumps and valves need hydrolysis resistance and dimensional stability
Cause Analysis
PPE/HIPS has low water absorption, hydrolysis resistance and high dimensional stability, suitable for various fluid handling equipment components; combined with wear-resistant grades to cover moving sealing surfaces; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
Select the PPO series for fluid parts and verify long-term hot water performance; select wear-resistant grades for moving surfaces; design sealing dimensions based on low water absorption; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PPO for pump and valve fluid parts is hydrolysis-resistant, and long-term hot water verification is a must; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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