Case

Project Entity

Client:​ A certain ink and color paste manufacturer in Jieyang, Guangdong.

Production Line Equipment:​ 20L–30L mainstream horizontal bead mill with circulation grinding process.

Supporting Pump Model:​ 1-inch aluminum alloy pneumatic diaphragm pump (Hard anodized aluminum pump body).

Medium:​ Ink, color paste, and new energy slurry for circulating nano-grinding.

*************************** Problems Solved **********************************

Pain Points of Existing Equipment	On-site Performance & Results
Severe Wear:​ Abrasive fillers erode the impeller; parts require replacement every 30 days	Efficiency Boost:​ Grinding time reduced from 90 min to 65 min per batch (+28% daily capacity). Eliminates manual priming, saving 10 min of auxiliary labor per batch
Poor Suction & Air Blocks:​ Struggles with high-viscosity materials, causing flow fluctuations and unstable fineness, leading to visible batch color differences.	Quality Stability:​ Pulse-free feeding prevents pigment flocculation. Batch color pass rate increased from 82% to 99.5%, with significantly lower fineness deviation
No Self-Priming:​ Manual priming needed per batch; dry-running instantly burns out the pump, causing frequent downtime.	Reduced Downtime:​ Old pump required repairs 2–3 times/month. The new 1″ Aluminum AODD pump ran 8 months straight, only replacing the diaphragm once. Maintenance hours dropped by 90%
Safety Hazard:​ Risk of motor sparks in solvent areas due to lack of explosion-proofing.	Safety & Environment:​ Removed explosion-proof motors (no spark risk). Low shear force eliminates foaming/splashing, reducing raw material loss by 5%
Fixed Pressure:​ Inability to match mill inlet pressure results in back-pressure and severe pipeline vibration	Cost Savings:​ Annual spare parts cost down 63%. Procurement cost of aluminum pump is only 60% of imported stainless steel pumps

*************************** Exclusive Advantages for Sand Milling Process**************************

Low Shear Protection:​ Reciprocating diaphragm action (no high-speed impeller) prevents heat buildup and pigment flocculation. Ensures uniform nano-particle distribution, eliminating floating/flooding defects.

Explosion-Proof Safety:​ Purely pneumatic with zero electrical parts. Complies with solvent safety codes, eliminating vapor explosion risks.

Precision Flow Control:​ Regulating valve allows fine-tuning of feed pressure/flow (High flow for rough grinding, low flow for fine grinding). Stabilizes bead motion, increasing grinding efficiency by 20%.

Wear-Resistant & Anti-Clog:​ Aluminum body + Ceramic balls / PTFE diaphragm. Handles TiO₂/CaCO₃ abrasives without jamming. Large 1″ flow path prevents filler sedimentation.

Dual-Mode Operation:​ Functions as both a Feeding Pump​ (from tank to mill) and a Circulation Pump​ (mill discharge back to tank). One pump does it all.

Easy Maintenance:​ Modular design allows diaphragm/ball changes in 15 mins. Corrosion-resistant aluminum lasts 2x longer than cast iron. No fragile impellers.

Specification Compatibility Comparison Table

Sand Mill Volume	Recommended AODD Pump Size	Connection Size	Application Scenario
10 – 30L Horizontal Sand Mill	1″ Aluminum AODD Pump	DN25	Single-unit circulation grinding for paints, inks, and color pastes (This Case)
50 – 100L Sand Mill	1.5″ AODD Pump	DN40	High-volume mass production lines
Lab-scale 5L Sand Mill	1/2″ (0.5″) AODD Pump	DN15	R&D and lab sample preparation

Daily Maintenance Checklist

• Air Source:​ Must install a filter. Drain water daily to prevent valve wear.
• Valve Balls:​ For hard fillers (TiO₂, Al₂O₃), inspect ceramic balls every 3 months.
• Cleaning:​ Circulate solvent after each shift to prevent pigment drying/caking.
• Pressure:​ Do not run at max 0.7 MPa. Use low pressure/speed for fine grinding to extend diaphragm life.
• Winter Care:​ Use low-temp diaphragms in cold weather to avoid rubber cracking