Ceramic Ball Valve
Ceramic ball valves are used to handle the most abrasive or(and) corrosive applications, including mining, coal fired power plants, steel works, poly silicon, pneumatic conveying, recycling, Mining, Oil and Gas, pulp and paper and petro chemistry.
Due to the significant corrosion and abrasion resistant, It series fully lined ceramic ball valves have the best performances in all kinds of excessively corrosive and abrasive applications as an on/off or a control valve. A standard fully lined ceramic ball valve is designed with a flanges 3-pieces body for PN16-63(ASME Class 150-600), and in sizes DN15-DN300( 1/2-12″), while DN15-DN100(1/2′-4″)has a floating ball and DN125-DN300(5-12″)has a trunnion ball.
Cold Isostatic Pressing(CIP) and high-temperature sintering nanometer high-purity 99.5% alumina and zirconia ceramics will not interact with almost all organic and inorganic chemicals, nor contaminate the process media. Their physically and chemically stability against most acids and alkalis will last for many years with little or no corrosive degradation.
The hardness of 99.5% alumina ceramics is about HRA88 or above. harder than zirconia (about HRA85), about 8 times harder than stainless steel. As valve core, ceramic components make the valve done well in the most severe abrasive conditions, such as pneumatic conveying to transport silicon powder.
The perfect spherical seal between the ceramic ball and seat ensure a Class VI shutoff. There is no clearance between the ball and seat, which prevent the deep sealing surface being marred and scratched by particles , and the ceramic ball will not be stuck anyway,
In general, the round-port ceramic ball valve is often used as a on-off valve. If precise and stable control performance are highly required in any application, the equal percent V-port ceramic ball valve is the best choice.
Size Range
DN15,20,25,32.40,50.65,80, 100, 125, 150,200,250.300
NPS 1/2′,3/4, 1′, 1 1/4′, 11/2′, 2′.21/2′,3′.4′.5′,6′,8′, 10′, 12
Pressure Rating
PN 16,25.40.63
ANSI Class 150.300.600
Face-to-Face Dimensions
According to ASME B 16.10
Temperature Range
-30*C-230″C(Standard Valves)
Max.600’C(High-temperature design)
Valve Tightness
ANSI B16. 104 Class VI(Zero Leakage)
Ceramic Ball Valve Materials
Body: A105N,SS304, SS316,SS304L,SS316L
Trim: High pure ceramics(99.5%Al203, ZrO2)
Stem: 17-4PH.SS316.SS316L, Hastelloy C276
Packing: Graphite, PTFE
| Items | Unit | Material | ||
|---|---|---|---|---|
| 99.5% Al2O3 | Y-ZrO2 | Ce-ZrO2 | ||
| Bulk Density | g/cm3 | 3.9 | 6.0 | 5.5 |
| Flexural Strength | Mpa | 400 | 950 | 800 |
| Elastic Modulus | Gpa | 300 | 200 | 250 |
| Hardness | HRA | 88 | 85 | 86 |
| Max. Temperature | °C | 1500 | 500 | 500 |
| Linear Expansion Coefficient | 10-6/°C | 7.5 | 9.6 | 9.6 |
Compared to most materials, ceramics used in valves have more universal and much higher corrosion resistance. Including in majority high-temperature acids and alkalis. But please be well noted that ceramics is sensitive in some certain media with different mixtures. state, pressure and temperature.
| Corrosion Resistance Chart | |||||
|---|---|---|---|---|---|
| Media | Temp. | 99.5% Al2O3 | ZrO2 | SS316 | HC276 |
| 20%HCL | 60°C | A | A | C | B |
| 20%HCL | 90°C | A | A | X | C |
| 60% H2SO4 | 60°C | A | A | C | B |
| 60% H2SO4 | 90°C | A | A | C | C |
| 10%HF | 60°C | B | C | C | B |
| 50%HF | 90°C | C | X | X | C |
| 60%HNO3 | 60°C | A | A | A | C |
| 60%HNO3 | 90°C | B | A | B | C |
| 30%NaOH | 60°C | A | A | A | A |
| 30%NaOH | 90°C | B | B | B | A |
A-Negligible or no corrosion, recommended for valve use
B-Little or slight corrosion, fitness for valve use
C-Significant corrosion, not recommended for valve use
X-Violent corrosion, not allowed for valve use
The mechanical properties of ceramics are very different from metals. The pressure resistance of all ceramics is many times higher than metals, but the tensile and the flexural strength is lower. Due to the high torque load, ceramic valve balls require materials with high flexural strength. In most applications, zirconia ceramics is used for valve balls.
High pure alumina (Al and stabilized zirconia components could maintain their shape, structure, mechanical strength as well as other physical and(or) chemical characteristics up to high temperature that more than 1000″ C. In addition to the material dependency, the thermal shock resistance is also highly different dependenting on the shape. In general, some simple shapes such as pipes and tablets have better thermal shock resistance than components that have complex construction.
therefore, all related conditions must be closely conserved.
Ceramic ball valve are widely used in all kinds of powder and solid materials including:
Main industries served:
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