Butt-Weld Cross Sight Glass with Tri-Clamp Window Closures

Welded Process Ports and Clamp-Secured Viewing Windows

This cross sight glass pairs a forged, CNC-machined stainless steel four-way body and butt-weld inline ends with opposed ferrule-style viewing ports secured by heavy-duty single-pin wing-nut Tri-Clamp rings. The clamp-retained window covers allow tool-free removal of the tempered glass lenses and gaskets for cleaning after the body is welded into the line.

Dimensional Standards and Reference Drawings

Source specifications list 1"–4" and DN25–DN100 under 3A, SMS, DIN, RJT, and IDF standards. Note that the embedded drawings No.50042 (3A, SMS, ISO, DS: 1"–4", OD D 25.4–101.6 mm, bore Dn 22.4–97.6 mm, length L 90–300 mm) and No.50041 (DIN: DN25–DN100, OD D 28–104 mm, length L 90–300 mm) depict the union-nut spherical cross series.

Alloy Grades and Elastomer Seals

Available in SS304 or SS316L stainless steel with silicone (VMQ), EPDM, Viton, NBR, or PTFE window gaskets for food, wine, dairy, beverage, vacuum, pharmaceutical, and chemical service (source-claimed tempered glass rating up to 10 bar and -10 °C to +120 °C with EPDM).

Pre-Weld Window Removal and Ordering Notes

Release both wing-nut clamps and remove the window frames, tempered glass lenses, and elastomer seals before butt-welding the flow ports into the pipeline. Specify at order placement if heat numbers or MTR certificates are required.