While choosing the right sanitary valve you will need to consider several factors. First, it is crucial to understand your application needs and then find a suitable valve. The specifications that engineers use to find an appropriate valve include pressure, size, type, material, actuation type, and ability to handle media

Valve type

Three factors will be considered to choose a valve type – function, flow control, and operation.

  • For flow control choose a valve type having good throttling performance. Even the valve size needs to offer flow control, which is inherent in certain designs where the flow rate can be altered, during the opening.
  • For backflow prevention select check valve.
  • For pressure control, there will be a need for pressure regulating valve.
  • The blending of two-stream processing will need a mixing valve.
  • Solid valves will be necessary for granules, powders or bulk materials.

At Flowtrend you can get specific food-grade sanitary valves of different categories including water valves, hydraulic valves, steam valves, vacuum valves, and air valves.

Valve size & performance spec

Right valve size is also crucial because improper size can trigger operating issues in the processing system. The undersized sanitary valve can choke the downstream flow as well as create backpressure in the upstream. The oversized valve can regulate the flow across limited range near closed position. The flow rate is used to size the valve properly.

Material

For corrosive media like saltwater, acids, chemicals, wastewater processing, and specific food & beverages need sanitary valve material that does not rust. If media is a slurry including abrasive solids, then the valve material needed will be erosion resistant.

For high-pressure media, an alloy of high strength will be essential to handle the internal stress. Hot media will need material that is robust and does not oxidize at high temperatures. For volatile compounds valve material of bronze or brass alloy is recommended.

Actuation

For automatic turn off and on a hydraulic, pneumatic or electric actuator will be needed to slide or turn the controls. Check valves don’t need actuation because it is operated with a pressure drop inside the system. Valve end connection is also a factor to look into. If existing connection has flanged fittings, choose flanged end valves.

In certain sectors and applications, there are specific standards, regulations, and codes, which need to be adhered to. A valve has to be certified before you apply it in specific pressure vessel, boiler, refinery, or other critical applications.