Zirconia Ceramic Sprayed Valve Balls

Special Coating Valve balls

TongBall's zirconia ceramic-coated valve balls leverage the phase transformation toughening of ZrO₂ and advanced thermal spray technology. The partially stabilized zirconia coating formed by plasma spraying exhibits exceptional thermal shock resistance, high toughness, and low thermal conductivity. With strong chemical inertness, it delivers outstanding resistance to corrosive wear in high-temperature (up to 1100°C) and strongly acidic or alkaline media, making it ideal for demanding applications requiring both wear resistance and prevention of media adhesion.

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	YSZ (Partially Stabilized Zirconia, Plasma Sprayed)
Operating Temperature Range	≤1100°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	HRA 85+
Bond Strength	≥50 MPa
Adhesion Class	Class 0 per GB/T 9286 (Cross-cut Test). No peeling is allowed.
Interface Porosity	<2%
Surface Roughness (Ra)	≤0.6 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