PFA Lined Stainless Steel Tubular Sight Glass

CRP manufacture PFA lined tubular sight glasses which are designed to offer the highest levels of process viewing with a clear Borosilicate Glass tube offering 360 degree viewing.

The glass is of a heavy wall construction up to 0.354″ thick. Depending on nominal bore the sight glasses can be used in corrosive processes up to 145 PSI and 302 degrees F.

The flange ends of the sight glasses are manufactured from stainless steel for external or marine environments and have HiPerFlon PFA linings. 


CRP can supply flanges to suit ASME 150 or DIN PN10 and PN16 depending on customer requirements. The choice of materials ensures that the sight glass will provide long service life conveying acids and other highly corrosive medias. 

In instances where the glass may be subjected to attack from, with hydrofluoric acid for example, we can supply the sight glass internally lined with an FEP sleeve.

We recommend that all our sight glasses are supplied with an outer acrylic shield to help prevent mechanical damage of the glass from external elements.

We offer a standard length of sight glass equivalent to the Atomac AKH2 valve in length. This is called our CTSG Tubular Sight Glass. We can supply all sizes of sight glasses in shorter or longer lengths up to 59″, we call these with a special length DTSG Tubular Sight Glasses.

Dimensions below are for the standard CTSG Tubular Sight Glass available to suit both ASME 150 and DIN PN10/16 flanges to EN558-1 basic series 1.

To Suit PipeworkFace – FaceFlange øRaised Face øWeight 500mm lg.Glass
ASME 150 Flanged Piping Systems
InchesDim. A InchesDim. B InchesDim. C InchesPoundsø InchesWall Inches
1 1/
DIN PN 10/16 Flanged Piping Systems
1 1/