Aseptic valve or hygienic valve, what's the real difference


From time to time I receive the opportunity to sit in on product trainings offered here at Shinjo Engineering. A couple weeks ago, I attended a session on sanitary valves, presented by Fred Bu, one of our consideration managers. He demonstrated the function and features of each sanitary valve and discussed which were hygienic and which were aseptic. Following the presentation, I asked Fred to assist me know very well what the difference is. Works out, I wasn’t the first person to ask.

What's aseptic? The word aseptic method for be free from contamination caused by harmful bacteria, microorganisms, or viruses. When applied to be able to valves, this would mean the materials and surface finish of the valve tend to be enhanced for exceptional clean-ability. Additionally, it means each element of the valve which comes in contact with preparations to get the hermetically sealed through the environment and atmosphere that surrounds the process. This is achieved by using a bellows around the valve stem in order to avoid harmful bacteria, et al, from getting yourself into the process. 
Exactly how hygienic and aseptic valves offer a similar experience
Hygienic and aseptic valves have a lot in accordance. They share similar materials of construction, and smooth surface finishes. Their design also requires there isn't any destination for bacteria to hide within the valve. Despite their similarities, you will discover distinct differences between the two. 

How’s hygienic different from aseptic?
While aseptic valves aim to prevent contamination from your environment, the main objective of hygienic valve design is easy clean-ability.
Regions of a hygienic valve will move around in and out of your process, becoming encountered with the surrounding environment. By way of example, a rising stem on a valve comes into play contact with accomplishing this, and can also come in contact with the environment outside of the process.

Take a look at this video of your hygienic mix-proof valve from Rieger Valves. Here you can see for the reason that valve opens and closes, the stem exits the entire body, and returns to the body.

Compare with this aseptic mix-proof valve. Note how the bellows be important.

When should i use aseptic or hygienic valves?
Hygienic valves are frequent in food, beverage, and dairy manufacturing. They are found in processes where clean-ability (CIP or COP) is extremely important.

Aseptic valves, are normally found in industries that require high quantities of purity. These include manufacturers of injection drugs, cosmetics, microelectronics, and the like. Aseptic valves are widely-used here to manipulate processes and minimize contamination from environmental sources.

In sanitary applications, valve design matters! If you're unsure which valve is perfect for your process, talk to an engineer. They can help determine which valve will achieve your objectives for production and cleanliness.
Uncertain which valve is right for your process? Ask us about it! We gladly provide technical assistance to businesses and municipalities in Wisconsin and upper Michigan.