Here you will find some of the internal components of a BIAR valve. From the stem gasket opening seal to the bellows seal and parts in between. Learn more about what goes into a BIAR valve assembly below.
Stem Gasket:
The stem gasket is what seals the opening and is specifically engineered so that there is no dead space, guaranteeing a representative sample every time a sample is taken. The standard stem gasket consists of a PTFE gasket and for higher temperatures and pressures this can be upgraded to a high pressure gasket made of stellite. These are easily replaced as part of a regular PM schedule. We have a choice of two outlet sizes, a 4mm opening and for processes of higher viscosities, a 10mm opening.
![Stem Gasket-diagram Stem Gasket-diagram](https://www.biar.us/hs-fs/hubfs/Stem%20Gasket-diagram.jpg?width=836&height=358&name=Stem%20Gasket-diagram.jpg)
![Stem Gasket-04mm Chart Stem Gasket-04mm Chart](https://www.biar.us/hubfs/Stem%20Gasket-04mm%20Chart.jpg)
![Stem Gasket-010 mm Chart Stem Gasket-010 mm Chart](https://www.biar.us/hubfs/Stem%20Gasket-010%20mm%20Chart.jpg)
Stuffing Box:
The stuffing box or ‘packing’ is a series of washers that effectively seal the valve around the stem. These come in a variety of materials and are customized for process compatibility.
![stuffing box stuffing box](https://www.biar.us/hubfs/stuffing%20box.png)
![Stuffing Box Simple Diagram Stuffing Box Simple Diagram](https://www.biar.us/hs-fs/hubfs/Stuffing%20Box%20Simple%20Diagram.jpg?width=295&height=350&name=Stuffing%20Box%20Simple%20Diagram.jpg)
![Single Detection Chart Single Detection Chart](https://www.biar.us/hs-fs/hubfs/Leak%20Detection%20Chart-1.jpg?width=150&height=350&name=Leak%20Detection%20Chart-1.jpg)
Leak Detection Port:
The stuffing box can also be modified to include an o ring and leak detection port for added security.
![leak detection port leak detection port](https://www.biar.us/hubfs/leak%20detection%20port.png)
![Stuffing Box Double Diagram Stuffing Box Double Diagram](https://www.biar.us/hs-fs/hubfs/Leak%20Detection%20Port%20Diagram.jpg?width=390&height=350&name=Leak%20Detection%20Port%20Diagram.jpg)
![Double Detection Chart Double Detection Chart](https://www.biar.us/hs-fs/hubfs/Leak%20Detection%20Double%20Chart.jpg?width=144&height=350&name=Leak%20Detection%20Double%20Chart.jpg)
Bellows Seal:
A bellows seal is another option that forms a hermetical seal, preventing leakage of liquid or gas, even when subjected to extreme changes in temperature. A leak detection port can give added security by notifying operations if product has leaked past the bellows seal with the addition of a pressure gauge.
![bellows seal bellows seal](https://www.biar.us/hubfs/bellows%20seal.png)
![BELLOWS SEAL Diagram BELLOWS SEAL Diagram](https://www.biar.us/hs-fs/hubfs/BELLOWS%20SEAL%20Diagram.jpg?width=292&height=350&name=BELLOWS%20SEAL%20Diagram.jpg)
![BELLOWS SEAL Chart BELLOWS SEAL Chart](https://www.biar.us/hs-fs/hubfs/BELLOWS%20SEAL%20Chart.jpg?width=152&height=350&name=BELLOWS%20SEAL%20Chart.jpg)