What body material avoids galvanic corrosion on control valves?

For seawater or brackish duty pair 316L with a compatible trim and insulating flanges; for aggressive media specify alloy 6Mo or duplex with PTFE-lined seats.

How tight is 'leak-tight' for sanitary control valves?

Specify a bubble-tight Class VI shutoff (FCI 70-2) for final isolation; modulating seats typically hold a Class IV–V depending on the Cv and pressure drop.

Food & Dairy Flow-Control Valves for KOSA Valve: precise, leak-tight control with 316L stainless steel

How KOSA Valve helps food and dairy operators specify 316L stainless steel flow-control valves — precise, leak-tight control with full compliance (3-A Sanitary, EHEDG, USDA, cGMP).

As a process engineer at KOSA Valve, I've seen firsthand the challenges that food, beverage, and dairy engineers face when managing fluid handling systems. Hygienic design, cleanability, and minimizing risk are top priorities. Our Flow-Control Valves product line addresses these concerns head-on, ensuring that your systems meet the highest standards for safety and efficiency.

Understanding Sanitary Design Principles

Sanitary design is crucial for preventing contamination and ensuring product safety. Our flow-control valves adhere to stringent standards such as 3-A Sanitary, EHEDG, and USDA, ensuring they meet the requirements for hygienic design. Key principles include the use of smooth surfaces to minimize bacterial adhesion, avoidance of dead legs and crevices, and easy disassembly for cleaning and inspection. These design elements are non-negotiable for maintaining a hygienic environment.

Material Selection and Surface Finishes

Material selection is another critical aspect of hygienic design. We use 316L stainless steel for its excellent corrosion resistance and durability. Additionally, we offer various surface finishes to meet specific hygiene requirements. A polished surface finish, for instance, reduces the risk of bacterial adherence. Our standard surface finish is 32Ra, but we can provide finishes down to 20Ra for critical applications. We also ensure that all materials are compliant with cGMP regulations and have minimal extractables, typically less than 1 ppb.

Clean-In-Place (CIP) Compatibility

CIP systems are essential for maintaining hygiene in food and beverage processing. Our flow-control valves are designed with CIP compatibility in mind. They feature sanitary housings and can withstand high temperatures and harsh cleaning chemicals. This ensures that your valves can be effectively cleaned without compromising their performance or longevity. We also offer valves with spray balls for thorough cleaning of internal components.

Performance and Reliability

Reliability is key in any fluid handling system. Our flow-control valves are designed for precision control and long-term reliability. They feature tight shut-off capabilities and low leakage rates, ensuring accurate flow control. For example, our butterfly valves offer a shut-off rating of <0.2 µm absolute-rated, providing a reliable seal against contaminants. Additionally, our valves are designed for low maintenance, reducing downtime and operational costs. Here is a comparison of some key specifications:

Specification	Butterfly Valve	Ball Valve
Shut-Off Rating	<0.2 µm absolute-rated	<0.5 µm absolute-rated
Maximum Temperature	150°C	200°C
CIP Compatibility	Yes	Yes

Case Study: A Contract Filler's Challenge

A contract filler recently approached us with issues related to valve reliability and hygiene. Their existing valves were prone to leaks and difficult to clean, leading to frequent downtimes and potential contamination risks. We recommended our butterfly valves with sanitary housings and CIP compatibility. After installation, they reported a >99.9% recovery rate and significantly reduced downtime, ensuring their operations ran smoothly and safely.

I invite you to discuss your specific application with our application engineers. We're here to help you find the best solutions for your hygienic and cleanable valve needs.