Operating conditions and original problem
High differential pressure caused cavitation in a feedwater-pump recirculation valve. Maintenance was required 2–3 times a year, with reported downtime losses of CNY 500,000 per day.
Technical approach
Variable-section channels distribute pressure reduction. Abrasive-flow polishing finishes the internal surface to Ra ≤1.6 μm, supported by reverse scanning for replacement.
Reported application result
The presentation reports 16 months of continuous operation and no maintenance during the reported run, replacing the previous repeated-maintenance pattern.
Application example from the Unmanned SLM Fluid Control Technical Proposal, V3, 7 September 2026. Results describe the cited application; customer identity is not disclosed.
For non-pressure-retaining wear parts: valve trim, seats and sealing surfaces. Pressure-retaining components require project-specific qualification before acceptance.