Tri-Clamp Mount Viewing Port with Slotted Union Closure
A circular sanitary viewing port combining a bottom Tri-Clamp ferrule mounting base with a threaded body and slotted round union nut that retains the flat viewing glass. Offered in SS304, SS304L, SS316, and SS316L across 1"–4" in the union-port reference drawing and DN25–DN150 (1"–6") in the header.
Metal Body Material | SS304 / SS304L / SS316 / SS316L |
|---|---|
Mounting & Closure | Bottom Tri-Clamp Ferrule Base with Top Slotted Union Nut |
Port Construction | Clamped Base Liner, Flat Sight Glass & Slotted Round Union Ring |
Scoped Size Range | DN25–DN150 (1"–6") |
Supported Standards | DIN, 3A, SMS, IDF, RJT, BS, ISO |
Product overview
Tri-Clamp Mounting Base and Slotted Union-Nut Window
This union-type clamped sight glass features a bottom Tri-Clamp ferrule flange that clamps directly onto a mating vessel or tee ferrule, paired with an externally threaded upper body and a slotted round union nut that compresses the flat viewing glass and elastomer gasket.
Union-Port Reference Drawing (1"–4") and Series Sizes
The embedded Union-type sight glass drawing tabulates 1", 1-1/4", 1-1/2", 2", 2-1/2", 3", and 4" with heights A from 35.0 to 62.0 mm, DIN neck diameters D from 28.0 to 104.0 mm, 3A/SMS neck diameters D from 25.4 to 101.6 mm, and union nut outer diameters D5 from 63.0 to 146.0 mm (note that the drawing's cross-section illustrates the plain weld-neck base rather than the bottom Tri-Clover ferrule flange). Header specifications list DN25–DN150 (1"–6").
Stainless Steel Grades and Seal Elastomers
Available in SS304, SS304L, SS316, and SS316L stainless steel with silicone, EPDM, Viton, and NBR seals. Note that the series parameter table in the series documentation also repeats generic inline tubular sight glass boilerplate.
Mounting and Ordering Checks
Attach the bottom ferrule to the mating nozzle using a standard Tri-Clamp ring and gasket, and use a hook spanner on the slotted union nut when servicing the sight glass lens. Specify the required ferrule size, standard, and elastomer material when ordering.
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