Sanitary valves, the name recommends the purpose that the valve meets health standards of food or medicine. The valve body should meet the stainless steel health standards. The parts contacting the medium are given mirror-polish, while the polishing and cleanliness degree is expected to be met as valve components health standards. However, the sanitary valves used in the food processing, hospitals and pharmaceutical factories are the main types and so absolute care is mandatory. In fact, it is also used meeting health standards so that there is no chemical or physical hazard.
The valves body is mostly in stainless steel and the sealing surface must be non-toxic. The hard and soft sealing material may be rubber and stainless steel. The common sanitary valves are the sanitary butterfly valves, sanitary check valves, sanitary ball valves, sanitary diaphragm valves and sanitary solenoid valves.
The sanitary valves require mechanical sealing:
- With a fineness in surface or above.
- In line meeting the GMP requirements.
- In situ disinfection and cleaning of the surface you are in contact with.
- No material accumulation and there is smooth transition.
- Structure to prevent the sealing surface material from fleeing outside.
Sanitary valves are mainly used in applications. They are designed for clean or sterile processing type applications. Thus for a valve to be used as sanitary valves means it should not have cavities or crevices to trap media that the bacteria feeds on and multiplies. The surfaces that are wet must be polished and the radius should be in minimum size such that entrapment or media clinging may be avoided. However, the brass, plastic and other materials to be used in sanitary applications are acceptable, yet stainless steel is mostly preferred. The sanitary valves types include mainly, 2-way, 3-way ball and also angle seat valves.
The sanitary valve applications that are used commonly include:
- Beverage and foods
- Sterilizing equipment
- Wine and spirits making, brewing
- Cosmetics and fragrance
Sanitary valves are very important for each application and it is really good to put isolation valves on each pipe so that it may be shut off during maintenance. The valves can be inline, though having a hot and cold manifold may be the neatest solution, with both, master and individual shut off valves that are located for easy access, just behind a removable panel.