Sanitary Pneumatic Welded Butterfly Valve 304/316L Stainless Steel 3-Piece Quick-Install / Welded Butterfly Valve Food Grade Zero Leakage
Product Overview
This series of sanitary pneumatic welded butterfly valves is designed for clean fluid transportation scenarios in industries such as food, pharmaceuticals, beverages, and daily chemicals. Crafted from 304/316L stainless steel, the valve body features a mirror-polished flow channel. Paired with food-grade seals and an aluminum alloy pneumatic actuator, it achieves rapid opening/closing, zero leakage, and easy cleaning. It supports welded connections to meet the installation requirements of clean pipeline systems, complies with GMP sanitary standards, and eliminates medium residue and secondary pollution.
🔹 Core Structure and Features
1. Sanitary Three-Piece Stainless Steel Valve Body
The valve body is precision-cast from 304/316L stainless steel with a three-piece bolted structure for easy disassembly and maintenance. The internal and external flow channels are mirror-polished (surface roughness Ra≤0.8μm), ensuring no dead corners or residue and preventing bacterial growth. It can directly pass food-grade safety certifications and is suitable for clean fluid conditions.
2. Food-Grade Zero-Leakage Sealing System
The seals are made of EPDM (Ethylene Propylene Diene Monomer) or silicone rubber, which are non-toxic, odorless, resistant to high/low temperatures and aging, and can withstand high-temperature steam sterilization. The butterfly plate and valve stem feature a dead-corner-free design; the sealing surfaces do not rub during operation, thoroughly avoiding medium residue and ensuring long-term zero leakage.
3. Efficient Pneumatic Actuator Drive
Equipped with an aluminum alloy double-acting/single-acting pneumatic actuator that is anodized for corrosion resistance and lightweight performance. It offers rapid response (0.3-1 second to open/close), supports remote control and automated operation, and can be paired with solenoid valves and positioners for intelligent control, adapting to production line automation needs.
4. Welded Connection Design
Adopts a butt-weld connection form, directly welded to the pipeline, eliminating risks of clamp loosening or seal aging. It is suitable for long-distance clean pipeline systems; after welding, the pipeline has high integrity, facilitating insulation and online cleaning/sterilization (CIP/SIP), complying with pharmaceutical and food industry pipeline installation standards.
🔹 Key Technical Parameters
| Item | Parameter Details |
|---|---|
| Nominal Diameter | DN15~DN100 (Customizable DN125-DN200) |
| Valve Body Material | 304 Stainless Steel (Standard), 316L Stainless Steel (Optional) |
| Seal Material | EPDM (Food Grade), Silicone Rubber, PTFE (Optional) |
| Nominal Pressure | PN16 (1.6MPa) |
| Applicable Temperature | -20℃~150℃ (EPDM seal, steam sterilization resistant) |
| Connection Type | Butt Weld (Complies with ISO 2852 standard) |
| Drive Method | Pneumatic Actuator (Double-acting / Single-acting optional) |
| Applicable Medium | Drinking water, beverages, alcohol, medicinal liquids, purified water, daily chemical fluids, etc. |
| Leakage Class | Zero Leakage (Soft Seal) |
| Execution Standard | Complies with GMP Sanitary Standards, Food Contact Material Safety Standards |
🔹 Material and Process Description
a, Valve Body Material: 304/316L stainless steel offers excellent corrosion and acid-alkali resistance, suitable for weak acid-alkali media in food and pharmaceutical industries. The three-piece bolted structure facilitates disassembly, cleaning, and maintenance.
b, Surface Treatment: The internal and external flow channels of the valve body are mirror-polished, with a surface roughness of Ra≤0.8μm. There are no dead corners or weld residues, meeting CIP/SIP online cleaning requirements and eliminating medium residue.
c, Seals: Food-grade EPDM rubber is non-toxic, odorless, resistant to high-temperature steam sterilization, and does not age or shed during long-term use, ensuring stable and reliable sealing performance.
d, Pneumatic Actuator: Made of aluminum alloy with anodized treatment for corrosion resistance and impact resistance. Double-acting or single-acting options are available; the single-acting type features a spring reset function, automatically closing/opening upon power or air failure to ensure operational safety.
🔹 Typical Application Scenarios
1. Food and Beverage Industry
Fluid transportation pipelines in beer, beverage, and dairy production lines. Suitable for media such as milk, juice, and beer, offering cleaning resistance and no residue. It complies with food hygiene standards to ensure product quality and safety.
2. Pharmaceutical Industry
Medicinal liquid, purified water, and water for injection (WFI) transportation systems. It can withstand high-temperature steam sterilization, has a dead-corner-free valve body to avoid drug contamination, and meets GMP certification requirements.
3. Daily Chemical Industry
Cosmetic and detergent production pipelines. Suitable for weak acid-alkali media, offering corrosion resistance and easy cleaning. It adapts to clean fluid conditions and prevents product contamination.
4. Water Treatment Industry
Pure water and mineral water production systems. The sanitary zero-leakage design is suitable for clean water transportation and control, meeting drinking water safety standards.
5. Biochemical Industry
Biological agent and fermentation broth transportation pipelines. It offers corrosion resistance and no secondary pollution, adapting to clean fluid conditions and ensuring the stability of bioactive media.
🔹 Product Advantages
1. Sanitary Design, Safe and Residue-Free
Full stainless steel mirror-polished valve body + food-grade seals, with a dead-corner-free flow channel. It complies with food and pharmaceutical hygiene standards, eliminates medium contamination risks, and is suitable for clean production scenarios.
2. Rapid Opening/Closing, Highly Automated
Pneumatic drive offers rapid response and short opening/closing times, suitable for automated production lines. It supports remote control, reduces manual operation, and improves production efficiency.
3. Corrosion Resistant, Long Service Life
304/316L stainless steel material is acid-alkali resistant and aging resistant, capable of withstanding cleaning and sterilization conditions for a long time. Food-grade seals are resistant to high/low temperatures and wear, offering a service life far exceeding ordinary valves.
4. Welded Connection, More Secure Installation
The butt-weld connection integrates with the pipeline, eliminating risks of bolt loosening or seal aging. It is suitable for long-distance clean pipeline systems and facilitates insulation and online cleaning.
5. Customized Service, Adapts to Various Needs
The valve body material (304/316L), seal material, and drive method (double-acting/single-acting) can be customized according to requirements. It supports pairing with accessories such as solenoid valves, filters, and positioners to meet automation control needs.
🔹 Installation and Operation Instructions
1.Before installation, verify if the valve model, diameter, and connection type match the pipeline, and check if the valve body, seals, and actuator are intact.
2.During welded installation, the valve must be in a half-open position to prevent high welding temperatures from damaging the seals. After welding, clean the weld slag to ensure a smooth flow channel.
3.After installing the pneumatic actuator, connect the air source to debug the opening/closing action, confirming accurate open/close position signals without jamming or leakage.
4.Before long-term shutdown, clean and sterilize the valve and store it dry. Before re-commissioning, manually open and close it several times to check if the sealing performance is normal.