+91 90336 30547 latascientific@gmail.com
ISO-aligned QC · Borosilicate 3.3 · Pan India supply network
Mild steel double window sight flow indicator with robust body and two toughened glass windows
Double Window Sight Flow Indicators

MS Double Window Sight Flow Indicator

Mild steel / WCB double window, 25NB to 400NB

Mild steel or WCB double window sight flow indicator — the economical standard for non-corrosive service. 25NB to 400NB, mountable in any orientation.

Request a quotation Full technical data and dimensions Request the datasheet
At a glance
Product typeDouble window sight flow indicator
Body materialMS / WCB
GlassToughened borosilicate 3.3 or soda lime, 2 off
GasketPTFE, 4 off
ConnectorsMS / WCB, 2 off
FastenersG.I. / A2 / CF8
Size range25NB to 400NB
Face to face127 mm to 850 mm, tolerance ±3 mm

Product overview

What it does, and where it fits.

The mild steel double window sight flow indicator is the volume standard of the range: a robust MS or WCB body, two toughened borosilicate 3.3 or soda lime windows and PTFE gaskets, at a fraction of the cost of the stainless equivalent.

It shares its dimensions exactly with the stainless version — 127 mm face to face at 25NB up to 850 mm at 400NB — so the two are interchangeable. It can be mounted in any orientation, and rotary wheel and flapper elements can be fitted to show flow velocity as well as presence.

Radiography of the body is available on request where the specification calls for it.

Features

Built into every unit.

  • MS or WCB body — the economical choice for non-corrosive duty
  • Two toughened borosilicate 3.3 or soda lime windows
  • Can be mounted in any orientation
  • Dimensionally interchangeable with the stainless version
  • Flapper and rotary wheel designs also available

Benefits

Why it earns its place in the line.

  • High quality robust design at the lowest cost in the range
  • Radiography provided on request
  • Two opposed windows let you look through the fluid against a light — far clearer than a single reflecting port
  • Robust flanged body drops straight into an existing line
  • Glass and gaskets replaceable in situ without cutting the pipework

Applications & industries

Where it is specified.

Typical applications

  • Confirming that a line is actually flowing
  • Watching for colour change, cloudiness or phase separation
  • Spotting entrained gas or cavitation at a pump
  • Verifying that a line has drained before maintenance

Industries served

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

Technical data

Specification for MS Double Window Sight Flow Indicator.

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

MS Double Window Sight Flow Indicator — technical specification
Product typeDouble window sight flow indicator
Body materialMS / WCB
GlassToughened borosilicate 3.3 or soda lime, 2 off
GasketPTFE, 4 off
ConnectorsMS / WCB, 2 off
FastenersG.I. / A2 / CF8
Size range25NB to 400NB
Face to face127 mm to 850 mm, tolerance ±3 mm
MountingAny orientation
Flange standardANSI B-16.5; BS-10 Table E, BS-10 Table F and PN 10 also available
TestingHydro tested to the standard hydro test pressure chart; radiography on request
MS Double Window Sight Flow Indicator — dimensional table
SizeOD (±3)PCDH (No.)H dia.L (±3)
25NB10879416127
40NB12798416165
50NB152121419178
80NB191152419203
100NB229191819229
150NB279241822267
200NB343298822520
250NB4063621225600
300NB4834321225650
350NB5334761229760
400NB5975401629850

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
1Body1MS/WCB
2Toughened glass2Borosilicate 3.3 / soda lime
3Gasket4PTFE
4Connectors2MS/WCB
5Fasteners—G.I./A2/CF8

Available on request

  • Flapper type and rotary wheel type designs
  • Radiography 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 MS Double Window Sight Flow Indicator showing numbered components

FAQ

Questions we are asked about this item.

Yes — the catalogue states it can be mounted in any orientation. Note that the flapper type is restricted to horizontal or vertical with upward flow.

Yes, on request.

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.

Talk to an engineer