Pneumatic sanitary butterfly valve is specially tailored for industries such as food, pharmaceuticals, and bioengineering that have extremely high cleanliness requirements. In these industries, the production process must meet strict conditions such as sterility, no residue, and easy cleaning. When designing and manufacturing this butterfly valve, materials that meet hygiene standards are selected and a structure that is compatible with them is adopted, which can fully ensure that there will be no pollution risk during the medium transportation process.
Core design requirements
Material safety guarantee
Valve body and valve plate: Adopt 316L stainless steel material. This kind of steel has low carbon characteristics and excellent corrosion resistance. Its surface is treated by electrolytic polishing, and the surface roughness Ra ≤ 0.8μm, effectively preventing microbial attachment and growth and ensuring hygiene and safety during use.
Seals: Select food-grade EPDM, silica gel or PTFE materials. These sealing materials are not only non-toxic but also can be used stably in the temperature range of -20℃ to 150℃. At the same time, they fully comply with relevant FDA/EC1935 standards, providing reliable sealing guarantee for medium transportation.
Structural optimization considerations
Dead-angle-free structure: Achieve a smooth transition between the valve plate and the valve body without grooves or gaps. This design fundamentally eliminates the possibility of medium residue and provides strong support for a high-cleanliness production environment.
Detachable design: The valve seat and valve body adopt a quick-release connection method, which greatly facilitates CIP (cleaning in place) and SIP (steam sterilization) operations. It can efficiently and comprehensively clean and sterilize the valve to ensure that the equipment always meets hygiene standards.
Connection method selection
Clamp quick-install connection: Supports clamp quick-install methods such as Tri-Clamp and DIN11851. Through hygienic clamps, a sealed connection with the pipeline can be quickly achieved without using bolts, effectively avoiding the pollution problems that may be caused by bolt connections. The operation is simple and hygienic.
Welded connection: For the connection method of directly using argon arc welding between the pipeline and the valve body, a zero-leakage sealing effect can be achieved. It is especially suitable for aseptic systems with extremely high sealing requirements, ensuring the safety and stability of medium transportation.
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