Alumina Ceramic Sprayed Valve Balls

Special Coating Valve balls

TongBall plasma-sprayed alumina valve balls offer a cost-effective solution for wear and corrosion resistance. Featuring dense Al₂O₃ or Al₂O₃-TiO₂ coatings with hardness exceeding HV1100 and excellent insulating properties, these balls provide superior resistance to most oxidizing acids, organic solvents, and high-temperature gases. Widely used in chemical pumps, agitator shafts, and conveying systems, they effectively combat particle erosion and chemical attack, extending equipment uptime.

Size Range	1/2" to 56" (Custom sizes available)
Pressure Rating	PN10-PN420 （Class150-4500）
Ball Material	F304, 1.4301, F316,1.4401, A105, F51/53/F55/F60/F44, 17-4PH, Inconel 625/718/825, Monel 400/500,K-500 etc.
Core Process/Coating	Al₂O₃ / Al₂O₃-TiO₂ (Plasma Sprayed)
Operating Temperature Range	≤900°C
Core Technical Parameters	Criteria for High-End Technical Level
Thickness Uniformity	Thickness deviation at any spherical position ≤±8%
Thickness Tolerance Range	100 - 500 μm. For ultra-thin coatings (<10 μm) Zero missed-spray allowed.
Surface Hardness	HV 1100-1300
Bond Strength	≥45 MPa
Adhesion Class	Class 0 per GB/T 9286 (Cross-cut Test). No peeling is allowed.
Interface Porosity	<3%
Surface Roughness (Ra)	≤0.4 µm
Surface Defect Rate	≤0.1 defects per m² ; no cracks or bubbles
Spraying Positioning Accuracy	±0.1mm
Edge Coverage	No edge warping or shrinkage 100% coverage