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Investment cast tubular sight flow indicator with cast stainless flanges and glass tube
Tubular Sight Flow Indicators

IC Tubular Sight Flow Indicator

Investment cast tubular, 15NB to 150NB

Investment cast tubular sight flow indicator for low pressure applications — a cost-effective alternative to bar-stock units. 15NB to 150NB at a constant 175 mm face to face.

Request a quotation Full technical data and dimensions Request the datasheet
At a glance
Product typeInvestment cast tubular sight flow indicator
Flange materialCF8 / CF8M / CF3M investment cast, 2 off
Glass tubeBorosilicate 3.3, 1 off
GasketPTFE, 4 off
Tie rodA2 / CF8
FastenersA2 / CF8
Safety shieldPolycarbonate / acrylic, provided on request
Size range15NB to 150NB

Product overview

What it does, and where it fits.

This model uses investment cast stainless flanges rather than machined bar stock, which brings the cost down substantially while keeping the clean internal form of a casting. The catalogue positions it for low pressure applications where a bar-stock unit would be over-specified.

Face-to-face is a constant 175 mm across every size from 15NB to 150NB, and the catalogue notes that custom face-to-face length adjustments are possible at site, with custom lengths up to 1500 mm available.

Note that this model uses a 16 mm hole up to 100NB, unlike the rest of the range which steps to 19 mm at 50NB — check the drilling against your mating flange.

Features

Built into every unit.

  • Suitable for low pressure applications
  • Cost effective compared to bar-stock sight flow indicators
  • Custom face to face length adjustments possible at site
  • Constant 175 mm face to face from 15NB to 150NB
  • Custom face to face lengths up to 1500 mm available

Benefits

Why it earns its place in the line.

  • Lowest-cost stainless tubular option
  • Site-adjustable face to face length
  • 360° visibility over the whole length — sees what a two-window unit misses
  • Glass tube and gaskets replaceable on site without cutting the pipework
  • Short face to face across the size range makes retrofit straightforward

Applications & industries

Where it is specified.

Typical applications

  • Low pressure process and utility lines
  • General visual flow confirmation
  • Watching for settling solids, stratification or a moving interface
  • Confirming complete drainage of a line before maintenance

Industries served

  • Chemical processing
  • Pharmaceutical
  • Dairy & food
  • Water & effluent treatment
  • Agrochemicals
  • Paper & bleaching
  • Petrochemical
  • Distillation & solvent recovery

Technical data

Specification for IC Tubular Sight Flow Indicator.

Figures below are for this product only — every item in the range carries its own dimension table.

IC Tubular Sight Flow Indicator — technical specification
Product typeInvestment cast tubular sight flow indicator
Flange materialCF8 / CF8M / CF3M investment cast, 2 off
Glass tubeBorosilicate 3.3, 1 off
GasketPTFE, 4 off
Tie rodA2 / CF8
FastenersA2 / CF8
Safety shieldPolycarbonate / acrylic, provided on request
Size range15NB to 150NB
Face to face175 mm constant; up to 1500 mm on request
Pressure ratingSuitable for low pressure applications
Flange standardANSI B-16.5; BS-10 Table E, BS-10 Table F and PN 10 also available
IC Tubular Sight Flow Indicators — dimensional table
SizeOD (±3)PCDH (No.)H dia.L (±3)
15NB9060416175
20NB10070416175
25NB10879416175
40NB12798416175
50NB152121416175
65NB180140416175
80NB191152416175
100NB229191416175
150NB279241819175

All dimensions in mm. Note that this model uses a 16 mm hole up to 100NB, unlike the rest of the range.

Material specification
No.DescriptionQty.Material
1Flange2CF8/CF8M/CF3M
2Gasket4PTFE
3Glass tube1Borosilicate 3.3
4Tie rod—A2/CF8
5Fasteners—A2/CF8
6Safety shield*1Polycarbonate / acrylic

Available on request

  • Custom face to face lengths up to 1500 mm
  • Safety shield on request
  • Different flange standards

Exploded view

Every part, in assembly order.

Item numbers match the material specification table above.

Exploded assembly view of the IC Tubular Sight Flow Indicator showing numbered components

FAQ

Questions we are asked about this item.

This model uses a 16 mm hole up to 100NB, where the rest of the range steps to 19 mm at 50NB. Check the drilling against your mating flange before ordering.

The catalogue describes it as suitable for low pressure applications without publishing a figure. Send your design pressure and we will confirm whether this model or an allen key version is appropriate.

Yes — the catalogue notes that custom face-to-face length adjustments are possible at site.

Enquiry

Tell us your line size — we'll confirm the spec.

Send the bore, the media, the temperature and pressure, and the flange standard you work to. Drawings and custom sizes welcome.

Enquire on WhatsAppChat to us on +91 90336 30547 Request the datasheetWe will email the drawing for this item Talk to a technical expertMaterial selection and duty review Send a drawingWe fabricate to your isometric or sketch Request a custom sizeNon-standard bores, lengths and drilling

Not sure which spec fits your process?

Send your requirement — media, temperature, pressure, dimensions — and we'll recommend the right product or fabricate it.

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