A Ceramic butterfly valve is a quarterturn isolation and control valve that employs a rotating disc as mechanism to start, stop or regulate the flow. The difference from conventional metal valves is that its trim – usually the disc and seat, or the entire lining – is manufactured from high performance engineering ceramics like alumina (Al₂O₃), zirconia (ZrO₂) or silicon carbide (SiC). These characteristics lead to extreme hardness, excellent wear resistance, and superior chemical stability, therefore, ceramic butterfly valves are highly suitable for abrasive slurries, corrosive chemicals, and high temperature applications in which metallic valves ends significantly too soon.
Ceramic butterfly valves are provided with all the standard end connection types, which enables designers to choose the most appropriate type based on pressure, space available for installation and maintenance.
Valves of the lug type have threaded lugs around the body, which allow one side of the line to be taken apart without interfering with the other side. This allows for disconnecting one side of the line for dead-end services and maintenance. Ceramic Trim lug type butterfly valves are very common in severe abrasion applications such as mining and power ash handling.
Flange style butterfly valves (a.k.a .
Flanged Butterfly Valves) have integral flanges on each end allowing for flange to flange bolted connections. They are also high in mechanical strength and easily aligned when installed. In ceramics, flanged constructions are the norm for chemical process lines transporting corrosive acids and bases.
Double Flanged Butterfly Valves extend the principle by adding full-faced flanges on both sides for incredible stiffness and concentricity. These are generally recommended for large diameter piping, high pressure pipelines and underground installation where long term dependability essential.
Grooved type butterfly valves are designed with grooved ends that are suitable for use with couplings, allowing for quick and easy, tool-free installation. Ceramic-lined grooved valves are frequently chosen for fire protection systems that may be subject to corrosive water or abrasive fuels.
Cast iron lug butterfly valvesfor the most part are less costly than the ductile or
Stainless Steel Butterfly Valve but still provide exceptional strength and reliability. They offer the best of both worlds, so it is no wonder they are highly sought after in the municipal water and utility services industry.
Halar lined pinless butterfly valves are a unique version with the body being lined with Halar (ECTFE) fluoropolymer and the disc is either coated or ceramic-based. The pinless design completely eliminates exposed stem pins which means no crevice corrosion or contamination- this is a significant benefit in ultra pure or highly corrosive environment.
Manual Flange Type Butterfly Valve is operated by handwheel or gear without external power, simple and reliable flow regulation. When furnished with ceramic components, they are suitable for use in remote or hazardous areas where electric actuators are not desired.
Motorized butterfly valves come with electric actuators that allow for operation automation. Ceramic motorized butterfly valves are particularly effective in process plants that need fine flow control, have remote or hard-to-service locations, or involve corrosive materials.
To conclude, a single ceramic butterfly valve is not a product but a range of solutions designed around unique connection types as well as unique operating techniques. If you’re looking for a lug butterfly valve to ensure maintainability, a double flanged butterfly valve for use in abrasive applications or a motorized butterfly valve for automation, ceramic technology is the industry leader that offers proven solutions for even the most complex processes.
