Sanitary Seat Valves

July 26, 2011

Waukesha Valve Manifold

Sanitary Seat Valves have been used in the Food and Pharmaceutical Markets for many years.  More recently however, this type of valve has undergone changes and upgrades to allow for even more types of applications amongst both Food and Pharma applications.  Below are just a few of the various Seat Valve options available through Holland Applied Technologies.

Body type – Today, with the help of 5 axis CNC machines, Sanitary seat valves can be made from bar stock and have many different body configurations.  Shut-off, Divert, Mix-Proof,  Aseptic, Y-body,  Zero- Deadleg, Tangential, and Throttling type Sanitary Seat Valves are now available.  Shut-off and Divert are the most common however now there are now Non-Slamming Divert valves that can be purchased as well.  Aseptic type valves include either a stem “flush” or the newer style Bellows type Aseptic configuration requiring no steam to the valve.  Y-body seat valves provide for large, straight through full port flow for viscous products or ones with particulates. Mix-Proof valves allow our customers to process on one line while Clean In Place procedures are happening on another line connected to it, all without the possibility of CIP fluid ever reaching the product being produced.   Tangential and Zero-deadleg type valves provide solutions for applications where complete drainage is often difficult with a Seat valve.  Buyer beware – Some valve manufacturer’s have much larger “Dead-legs” or hard to clean areas than others….Holland Applied Technologies personnel can illustrate the differences.

Actuators and Control Tops – With the many types of body styles, increased line sizes and increased line pressures in the industry, Actuators have also transformed through the years.  Standard air to open/spring to close type actuators dominate most applications however there are now Air to Air, Heavy Duty Spring, Two Position Type, Throttling and various spring/actuator sizes on the market today.  Each has its place with different applications such as the Two Position where product flows at a high rate of speed up to a certain point where it then partially closes and “dribbles” flow until a certain product level is achieved.  Control tops now include not only micro or proximity type switches but everything from As-i Fieldbus, DeviceNet, and Set/Forget type to name a few.

Stem and Seat – Today’s stem/seat combinations are much improved.  Old style complete rubber coated plug seats have now been replaced by either special oring type or Teflon/Peek type seats in the Sanitary Seat Valve market.  Gone are the days where rubber chunks could break off from the stem seat only to end up in the product downstream.

If you have an application for a Sanitary Seat Valve in your future, please give us a call, we can help.