The stainless steel sanitary butterfly valve features a split - type structure. The valve stem and valve disc are integrated, and the surface of the valve body channel is smooth, resulting in low fluid resistance, a high CV value, strong flow capacity, and light torque.

It is mainly applied in industries with extremely high hygiene and safety requirements, such as food, beverage, pharmaceuticals, and biotechnology. Thanks to its special structural design and mirror - finish surface treatment process, the stainless steel sanitary butterfly valve can safely ensure the safety and cleanliness requirements of fluid transportation.

I. Core Features

1. High - quality Materials and Fine Surface Treatment

The main flow - through components of the stainless steel sanitary butterfly valve, such as the valve body, valve disc, and valve stem, are generally made of high quality 304、316L stainless steel. This material not only has excellent corrosion resistance but is also non - toxic, effectively preventing corrosion during contact with fluids and avoiding contamination of the fluids. The surface in contact with the medium is highly polished to achieve an extremely low surface roughness, usually requiring Ra ≤ 0.8μm. The mirror - like finish effectively prevents the growth of microorganisms and the residue of materials, providing a solid guarantee for the purity of the fluid.

2. Aseptic Structure Design

To minimize the risk of contamination, the stainless steel sanitary butterfly valve adopts a seamless design, such as a welded valve body, or is connected by precisely processed clamps or threads. The valve stem is generally installed at the top to avoid penetrating the valve cavity, thus eliminating potential contamination hazards. The edge of the valve disc and the sealing surface of the valve seat are precisely matched. When the valve is closed, it ensures no stagnant areas, further preventing material residue and the growth of microorganisms.

3. Regulatory - compliant Sealing Materials

For the sealing rings, also known as valve seats, materials such as PTFE, silicone, and rubber can be selected. These materials meet relevant food - safety requirements like FDA standards. They are non - toxic, odorless, and non - leaching, fully satisfying the safety requirements for contact with food and pharmaceuticals. This ensures that the stainless steel sanitary butterfly valve maintains excellent sealing performance across various working environments.

4. Easy Cleaning and Sterilization (CIP/SIP)

The smooth inner cavity and streamlined design of the stainless steel sanitary butterfly valve allow cleaning fluids (CIP) and sterilization steam (SIP) to pass through and cover all contact surfaces smoothly. This feature enables the system to achieve online cleaning and sterilization easily, meeting the frequent hygiene treatment requirements of these industries, greatly improving the hygiene standards in the production process, and reducing the risk of product contamination.

II. Structure and Working Principle

1. Structural Components

◦ Valve Body: The valve body of the stainless steel sanitary butterfly valve usually adopts a short - structure, straight - through design, and the connection methods mainly include sanitary clamps (Clamp), threads (Thread), and butt welding (Butt Weld). These connection methods can ensure smooth and non - stagnant joints, effectively preventing material accumulation at the joints and ensuring the smooth and hygienic fluid conveying.

◦ Valve Disc: It is disc - shaped and rotates around its axis in the valve body. The edge contour of the valve disc is carefully designed to precisely match the valve seat, achieving good sealing performance and accurate flow control.

◦ Valve Stem: It is used to transmit torque and drive the rotation of the valve disc. Generally, a single - piece stem design is adopted, extending from the top of the valve body to avoid contact with the medium inside the valve cavity, reducing the possibility of contamination.

◦ Valve Seat: The elastic sealing ring installed on the valve body or valve disc is the key component for achieving sealing. The selected sealing materials that meet hygiene standards can ensure the sealing performance of the stainless steel sanitary butterfly valve under different working conditions and prevent fluid leakage.

◦ Actuators: Manual (handle, handwheel), pneumatic, or electric actuators can be selected according to actual needs. Manual actuators are simple and intuitive to operate, suitable for occasions with a low operation frequency; pneumatic actuators have a fast response speed and large operating force, meeting the application scenarios with high requirements for operation speed and force; electric actuators are convenient for remote control and automated operation, suitable for production systems with a high degree of automation.

1. Working Principle

The working process of the stainless steel sanitary butterfly valve is simple and clear. By rotating the valve stem 90°, the valve disc is driven to rotate from the fully open position parallel to the pipeline axis to the fully closed position perpendicular to the pipeline axis, thus realizing the opening and closing control of the fluid medium. When flow regulation is required, the valve disc can be rotated to the corresponding angle, and the flow rate of the fluid can be adjusted by changing the contact area between the valve disc and the fluid. Due to its low flow resistance, quick opening and closing, and easy operation, it has obvious advantages in the sanitary processes that require rapid fluid control, and can efficiently meet various fluid control requirements in the production process.

III. Core Advantages

1. Excellent Hygienic Performance

The stainless steel sanitary butterfly valve is designed and manufactured in strict accordance with the highest cleanliness requirements, fully meeting the standards of certification systems such as GMP and HACCP, and can effectively ensure the hygiene and safety of the production process, providing a reliable guarantee for product quality.

2. Efficient Cleaning and Sterilization

Its characteristics of easy cleaning and sterilization significantly shorten the time required for cleaning and disinfection, reduce related costs, and improve production efficiency at the same time, enabling enterprises to achieve efficient production while meeting strict hygiene standards.

3. Low Flow Resistance and Large Flow Capacity

When fully open, the flow path of the stainless steel sanitary butterfly valve is almost the same as that of the pipeline, with extremely small pressure loss, which can ensure that the fluid passes smoothly with low energy consumption, improving the efficiency of fluid conveying, especially suitable for production processes with high flow requirements.

4. Compact Structure and Light Weight

This design feature enables the stainless steel sanitary butterfly valve to save a lot of space during installation, making it easy to arrange in a dense pipeline system. At the same time, it also reduces the difficulty of installation and maintenance.

5. Simple Operation and Quick Opening/Closing

It only needs a 90° rotation to achieve full opening or full closing. The operation is simple and fast, and it can quickly respond to the fluid control requirements in the production process, improving the operation efficiency of the production system.

6. Convenient Maintenance

With a modular design, the replacement of vulnerable parts such as sealing rings is relatively easy, reducing maintenance costs and downtime, helping enterprises maintain the continuity and stability of production.

IV. Application Scenarios

1. Food and Beverage Industry

Stainless steel sanitary butterfly valves are widely used in the conveying and filling links of production lines for milk, juice, wine, edible oil, seasonings, purified water, etc., as well as in CIP systems. In the milk processing process, it can precisely control the flow of milk from storage tanks to sterilization equipment, filling equipment, and other links, ensuring stable product quality; on the beverage filling line, it can quickly and accurately control the flow of liquids, ensuring filling accuracy and efficiency.

2. Pharmaceutical and Biotechnology Fields

It is used in pipeline systems for pharmaceutical water (PW, WFI), medicinal liquids, culture media, biological products, fermentation tanks, liquid - dispensing tanks, CIP/SIP stations, etc. In the pharmaceutical process, the requirements for the purity and hygiene standards of fluids are extremely high. The stainless steel sanitary butterfly valve can strictly control the conveying and flow of fluids, prevent drug contamination, and ensure that drug quality meets strict pharmacopoeia standards; in biotechnology, for the conveying of biological agents, cell culture fluids, etc., its high - precision control and excellent hygienic performance can provide reliable guarantees for biological experiments and production.

3. Cosmetics Industry

It is suitable for the conveying of raw materials and finished products such as lotions, perfumes, creams, etc. In the cosmetics production process, the stainless steel sanitary butterfly valve can ensure the quality and stability of raw materials during storage, conveying, and mixing, and during the filling process, it can precisely control the flow of products, ensuring that the amount of products in each filling container is accurate. At the same time, it can guarantee the hygiene and safety of products, preventing contamination during the production and filling processes.

4. Medical Device Industry

It can be applied to cleaning and disinfection equipment, purified water systems, etc. In the production and cleaning process of medical devices, the stainless steel sanitary butterfly valve can ensure the purity of cleaning fluids and purified water, effectively preventing cross - contamination, and providing guarantees for the quality and safety of medical devices.

V. Selection Guide

1. Process Requirements

Determine parameters such as working pressure, temperature range, flow control accuracy, and CIP/SIP frequency according to actual process requirements. In the food processing process with high - temperature sterilization, it is necessary to select a stainless steel sanitary butterfly valve that can withstand high temperatures; for pharmaceutical processes with high requirements for flow control accuracy, a butterfly valve with high - precision flow regulation functions should be selected.

2. Sealing Materials

Select compatible sealing materials, such as EPDM, silicone rubber, FKM, etc., according to the properties and temperature of the medium. If the medium is high - temperature steam, EPDM sealing materials with good high - temperature resistance can be selected; for some corrosive media, FKM sealing materials with strong corrosion resistance are required.

3. Surface Finish

Ensure that the surface finish of the stainless steel sanitary butterfly valve strictly meets the Ra value requirements. Common standards are Ra≤0.8μm or Ra≤0.5μm to meet the strict hygiene requirements of different industries. In the food and pharmaceutical industries, higher surface finishes are usually required to prevent the growth of microorganisms and material residues.

4. Certification Requirements

Confirm that the valve and sealing parts meet applicable industry standards such as FDA, 3A, etc., to ensure the compliance and quality reliability of the product in the target market. Different countries and regions may have different certification requirements for the food and pharmaceutical industries, and enterprises should make selections according to actual needs during the selection process.

The stainless steel sanitary butterfly valve, with its excellent performance in hygienic properties, structural design, operation and maintenance, as well as application adaptability, has become an ideal choice for fluid control in many industries with extremely high hygiene and safety requirements. The correct selection and use of stainless steel sanitary butterfly valves can provide reliable guarantees for the production processes of enterprises, helping them achieve efficient and stable production while meeting strict hygiene standards.