View Ports

The strongest, most secure sanitary sight glass available, Viewport's mechanically prestressed windows are available in a sanitary clamp design for sight ports in processing applications or inline visual flow indicators.

Unlike some other sight glasses, Viewport sight glasses meet the USP Type 1 standard for pharmaceutical use.

Described as offering the optics of glass and the strength of steel, these glass elements provide a level of safety, and a useful service life, well beyond that provided by conventional tempered glass or plastic in sanitary service. Even at the most extreme temperatures (as high as 536° F) or in overpressure situations, sudden, total failure - that involving leakage or explosive shattering of the glass - essentially never occurs.

Viewports are manufactured to fit sanitary clamp connections. With
simple and fast installation with no risk of breakage, this sleek,
compact, one-piece design provides a cleaner look, less bacteria
traps and unsurpassed safety. The Viewport sight glass can
be used as a view port mounted on a ferrule, a “cross” for inline
visual flow indication or as a light port. Many other connection
types are also available, as shown on the reverse side. Materials
available include 2205 Duplex Stainless Steel, Hastelloy®,
Monel® and Inconel®.

Approvals and Technical Data:
– USP Class VI (tested to confirm biocompatibility)
– BPE Compliant and TÜV Approved
– Sight glass fused to metal conforming to DIN7079
– Borosilicate glass to USP Type I and DIN7080
– Standard surface finish of 10 Ra μ-in (0.25μm)
– Material to ASTM/ASME, TÜV and DIN/EN standards
– Certificate of Conformity to EN 10204-3.1B or 3.1A
– Pressure Equipment Directive 97/23/EG

View Ports

Standard Tube ODd1 Inch/MMd2 Inch/MMd3 Inch/MMS Inch/MMPSIG@ 536 F
1/2″, 3/4″0.98″/ 25 mm0.71″/ 18 mm0.39″/ 10 mm0.39″/ 10 mm230
1″, 1 1/2″1.99″/ 51 mm1.61″/ 41 mm0.98″/ 25 mm0.39″/ 10 mm230
2″2.52″/ 64 mm2.05″/ 52 mm1.18″/ 30 mm0.39″/ 10 mm200
2 1/2″3.05″/ 78 mm2.72″/ 69 mm1.38″/ 35 mm0.39″/ 10 mm200
3″3.58″/ 91 mm2.99″/ 76 mm1.57″/ 40 mm0.39″/ 10 mm150
3 1/2″4.17″/ 106 mm3.54″/ 90 mm1.97″/ 50 mm0.39″/ 10 mm150
4″4.69″/ 119 mm4.02″/ 102 mm2.17″/ 55 mm0.47″/ 12 mm150
6″6.57″/ 167 mm5.98″/ 152 mm2.95″/ 75 mm0.63″/ 16 mm90
8″8.56″/ 218 mm7.80″/ 198 mm3.94″/ 100 mm0.71″/ 18 mm90
10″10.55″/ 268 mm9.65″/ 245 mm4.72″/ 120 mm0.79″/ 20 mm90
12″12.56″/ 319 mm11.81″/ 300 mm5.51″/ 140 mm0.87″/ 22 mm80
*Temperature and pressure apply to sight glass only.
View Ports

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View Ports

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