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ISO-aligned QC · Borosilicate 3.3 · Pan India supply network
Mild steel allen key tubular sight flow indicator with galvanised tie rods and glass tube
Tubular Sight Flow Indicators

MS Allen Key Tubular Sight Flow Indicator

Mild steel allen key tubular, 15NB to 400NB

Mild steel allen key tubular sight flow indicator — a cost-effective solution for less demanding applications, with custom sizes up to 600NB.

Request a quotation Full technical data and dimensions Request the datasheet
At a glance
Product typeAllen key tubular sight flow indicator
Flange materialMS, 2 off
Glass tubeBorosilicate 3.3, 1 off
GasketPTFE, 2 off
Tie rodG.I.
FastenersG.I.
Safety shieldPolycarbonate / acrylic, provided on request
Size range15NB to 400NB; custom sizes up to 600NB

Product overview

What it does, and where it fits.

The mild steel allen key model is the economy option in the tubular family: the same allen key tie rod construction and borosilicate 3.3 glass tube, on MS flanges with G.I. tie rods and fasteners.

The catalogue positions it as a cost-effective solution for less demanding applications, and notes that custom sizes up to 600NB can be built — larger than any other model in the range. Installation is straightforward in both horizontal and vertical lines, and cleaning and maintenance are simple.

Features

Built into every unit.

  • Cost effective solution for less demanding applications
  • Custom sizes up to 600NB — the largest in the range
  • Easy installation in horizontal and vertical lines
  • Borosilicate 3.3 glass tube with PTFE gaskets
  • Acrylic protection tube and toughened glass tube on request

Benefits

Why it earns its place in the line.

  • Lowest cost route to full-bore 360° visibility
  • Custom sizes to 600NB where other models stop at 400NB
  • Easy cleaning and maintenance
  • 360° visibility over the whole length — sees what a two-window unit misses
  • Glass tube and gaskets replaceable on site without cutting the pipework

Applications & industries

Where it is specified.

Typical applications

  • General process visibility on non-corrosive service
  • Water, effluent and utility lines
  • 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 MS Allen Key Tubular Sight Flow Indicator.

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

MS Allen Key Tubular Sight Flow Indicator — technical specification
Product typeAllen key tubular sight flow indicator
Flange materialMS, 2 off
Glass tubeBorosilicate 3.3, 1 off
GasketPTFE, 2 off
Tie rodG.I.
FastenersG.I.
Safety shieldPolycarbonate / acrylic, provided on request
Size range15NB to 400NB; custom sizes up to 600NB
Face to face175 mm to 200 mm, tolerance ±3 mm
MountingHorizontal and vertical lines
Flange standardANSI B-16.5; BS-10 Table E, BS-10 Table F and PN 10 also available
MS Allen Key Tubular Sight Flow Indicator — dimensional table
SizeOD (±3)PCDH (No.)H dia.L (±3)
15NB9060416175
20NB10070416175
25NB10879416175
40NB12798416175
50NB152121419175
65NB180140419175
80NB191152419175
100NB229191819175
150NB279241822175
200NB343298822185
250NB4063621225185
300NB4834321225190
350NB5334761229195
400NB5975401629200

All dimensions in mm. Flange drilling to ANSI B-16.5; BS-10 Table E, BS-10 Table F and PN 10 drilling are also available — see the flange standards table.

Material specification
No.DescriptionQty.Material
1Flange2MS
2Gasket2PTFE
3Glass tube1Borosilicate 3.3
4Tie rod—G.I.
5Fasteners—G.I.
6Safety shield*1Polycarbonate / acrylic

Available on request

  • Custom sizes up to 600NB
  • Acrylic protection tube
  • Toughened glass tube
  • Safety shield on request

Exploded view

Every part, in assembly order.

Item numbers match the material specification table above.

Exploded assembly view of the MS Allen Key Tubular Sight Flow Indicator showing numbered components

FAQ

Questions we are asked about this item.

Custom sizes up to 600NB, which is beyond the 400NB limit of the rest of the range.

The catalogue positions this model as a cost-effective solution for less demanding applications and publishes the 40 bar figure against the stainless allen key model. Send your design pressure and we will confirm what can be built.

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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