316L Stainless Steel Sanitary Clamp Butterfly Valve — Viton Seat, up to 200 °C

Cematic's 316L stainless steel sanitary clamp butterfly valve is the standard solution for fluid control in sanitary industries with aggressive fluids or high temperatures. Its Viton (FPM) seat also ensures a tight and resistant seal up to 200 °C, far exceeding the thermal range of standard EPDM.

Therefore, it is the right choice when the process combines high temperature, aggressive cleaning agents, or fluids chemically incompatible with other elastomers.

Its internal surface with a Ra ≤ 0.8 µm finish also facilitates effective and quick cleaning. Consequently, it prevents residue accumulation between production cycles. It also complies with the most demanding hygiene standards in the food, pharmaceutical, and cosmetic industries.

Operating Principle — Sanitary Clamp Butterfly Valve with Multi-position Lever

The disc rotates 90° via the multi-position lever between fully open and fully closed. The lever also allows precise adjustment of flow in intermediate positions, so the operator can regulate or block fluid passage according to the process. Furthermore, it does not require tools or specialized knowledge for operation.

The ISO Clamp connection also allows the valve to be installed and removed without welding and without special tools. Consequently, it simplifies preventive maintenance and reduces downtime. This way, the operator can remove the valve for inspection or cleaning in seconds.

Why Viton over EPDM in this application

The choice of seat defines the valve's actual chemical and thermal compatibility. Therefore, Viton is the correct seat in the following cases:

• High temperature up to 200 °C: Viton resists up to 200 °C, while EPDM is limited to 110 °C. Therefore, it is the only viable elastomer in full-temperature SIP sterilization processes.
• Fluids with oils, hydrocarbons, or solvents: Viton, on the other hand, offers excellent chemical resistance to oils, hydrocarbons, and solvents that would degrade EPDM in weeks. Consequently, it significantly extends the valve's lifespan in such environments.
• Aggressive cleaning agents: In CIP cycles with concentrated acids and alkalis at high temperatures, Viton also maintains its sealing integrity. EPDM, in contrast, may experience premature deterioration under these conditions.
• Additives and flavoring agents: Viton is compatible with a significantly wider chemical range than EPDM, making it the standard seat in food additive and cosmetic processing.

Construction Materials

The body is made of 316L stainless steel (CF3M), which is the standard material in hygienic and chemically demanding applications, as it offers greater resistance to chlorides and cleaning agents than SS304. The disc is also made of SS316L, maintaining material consistency throughout the fluid contact area.

The seat is made of Viton (FPM), which is the correct elastomer for high temperatures and aggressive fluids. Screws and nuts are made of SS304, ensuring external corrosion resistance in humid environments. Finally, the internal Ra ≤ 0.8 µm finish eliminates surface roughness that could retain product or microorganisms.

Technical Specifications

Fluid Compatibility

This sanitary clamp butterfly valve with a Viton seat is compatible with a wide range of fluids in the sanitary and chemical industries. The main groups are described below:

• Food fluids — dairy, juices, beer, soft drinks — SS316L and Viton maintain product integrity; additionally, the Ra ≤ 0.8 µm finish prevents residue retention between batches
• Purified water and water for injection — SS316L does not release metallic ions; therefore, it is the standard material in pharmaceutical water lines
• Clean steam up to 200 °C — Viton resists steam at full SIP sterilization temperature; EPDM, however, is not viable above 110 °C
• CIP agents — caustic soda, nitric acid, peracetic acid — Viton resists the most aggressive cleaning agents; likewise, SS316L withstands typical concentrations in CIP cycles
• Essential oils, additives, and flavoring agents — Viton offers superior chemical compatibility to EPDM with oils and organic compounds; therefore, it is the correct seat in flavor and cosmetic processing
• Moderate organic solvents — Viton resists a wider range of solvents than any other general-purpose elastomer; however, verify specific compatibility with Cematic's technical team for chlorinated or concentrated aromatic solvents

Applications of the sanitary clamp butterfly valve with Viton

Food and Beverages

The sanitary clamp butterfly valve controls flow in dairy, juice, beer, and soft drink lines. Its hygienic design maintains product integrity, making it the standard component in plants with food safety certification. Additionally, the Viton seat resists the acids and alkalis common in food and beverage processing.

Pharmaceutical and Biotechnology

In transfer lines and purified water, 316L steel also withstands aggressive cleaning agents without corrosion or fluid contamination. Therefore, it ensures process sterility in every operation. Furthermore, the Ra ≤ 0.8 µm internal finish complies with the surface requirements of the most demanding pharmaceutical regulations.

CIP/SIP Systems

The multi-position lever, for its part, regulates flow during cleaning and sterilization cycles. Consequently, it is not necessary to remove the valve to clean the circuit. Additionally, Viton maintains sealing integrity at SIP sterilization temperatures up to 200 °C, which differentiates it from EPDM in this type of process.

Chemical Processing and Additives

Viton, therefore, offers excellent resistance to oils, hydrocarbons, and solvents. For this reason, this valve is ideal for handling additives and flavoring agents in processes of high chemical complexity. It also extends the component's lifespan in corrosive environments where other elastomers fail prematurely.

Cosmetics and Personal Care

This valve also handles creams, lotions, and liquid soaps safely and hygienically. Its polished interior also prevents cross-contamination between formulations in multi-purpose production lines. Therefore, it is a key component in high-quality cosmetic production plants where product traceability is critical.

In summary, Cematic's sanitary clamp butterfly valve combines high-performance materials, ease of operation, and sanitary design. It is, therefore, the most reliable choice for demanding sanitary industrial processes.

For the complete range of hygienic butterfly valves, see hygienic valves collection →

Technical Data Sheet