+91 90336 30547 latascientific@gmail.com
ISO-aligned QC · Borosilicate 3.3 · Pan India supply network
FEP PFA lined mild steel tubular sight flow indicator with glass tube and galvanised tie rods
Tubular Sight Flow Indicators

Lined MS Tubular Sight Flow Indicator

FEP/PFA lined mild steel tubular, 15NB to 400NB

Lined tubular sight flow indicator on mild steel flanges — the same fluoropolymer wetted path at lower cost. 15NB to 400NB, to 200 °C, spark tested at 15 kVA.

Request a quotation Full technical data and dimensions Request the datasheet
At a glance
Product typeLined tubular sight flow indicator
Flange materialMS, 2 off
LiningFEP / PFA
Glass tubeBorosilicate 3.3, 1 off
GasketPTFE, 2 off
Tie rodG.I.
FastenersG.I.
Safety shieldPolycarbonate / acrylic, provided on request

Product overview

What it does, and where it fits.

Functionally identical to the lined stainless tubular model, this version uses mild steel flanges and G.I. tie rods and fasteners. Because the flange is lined, the wetted path is the same fluoropolymer and borosilicate combination — the saving is on the external metal, not on the chemistry.

The catalogue rates it for operations up to 200 °C, and every sight glass is spark tested at 15 kVA to prove liner integrity. Dimensions match the stainless version exactly across 15NB to 400NB.

Features

Built into every unit.

  • FEP/PFA lined mild steel flanges — fluoropolymer wetted path at lower cost
  • Suitable for operations up to 200 °C
  • All sight glasses spark tested at 15 kVA
  • Borosilicate 3.3 glass tube with PTFE gaskets
  • 15NB to 400NB, dimensions matching the stainless version

Benefits

Why it earns its place in the line.

  • Same wetted materials as the stainless version at lower cost
  • Proven liner integrity — spark tested at 15 kVA
  • 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

  • Acid transfer
  • Bleach chemicals, caustic and alkali service
  • Pharmaceuticals, waste processing and water treatment
  • Agriculture chemical handling

Industries served

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

Technical data

Specification for Lined MS Tubular Sight Flow Indicator.

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

Lined MS Tubular Sight Flow Indicator — technical specification
Product typeLined tubular sight flow indicator
Flange materialMS, 2 off
LiningFEP / PFA
Glass tubeBorosilicate 3.3, 1 off
GasketPTFE, 2 off
Tie rodG.I.
FastenersG.I.
Safety shieldPolycarbonate / acrylic, provided on request
Size range15NB to 400NB
Face to face175 mm to 230 mm, tolerance ±3 mm
Temperature rangeSuitable for operations up to 200 °C
Spark testingAll sight glasses spark tested at 15 kVA
Flange standardANSI B-16.5; BS-10 Table E, BS-10 Table F and PN 10 also available
Lined MS Tubular Sight Flow Indicator — dimensional table
SizeOD (±3)PCDH (No.)H dia.L (±3)
15NB9060416175
20NB10070416175
25NB10879416180
40NB12798416185
50NB152121419190
65NB180140419195
80NB191152419200
100NB229191819200
150NB279241822210
200NB343298822210
250NB4063621225220
300NB4834321225220
350NB5334761229230
400NB5975401629230

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
2Lining1FEP/PFA
3Gasket2PTFE
4Glass tube1Borosilicate 3.3
5Tie rod—G.I.
6Fasteners—G.I.
7Safety shield*1Polycarbonate / acrylic

Available on request

  • Safety shield (polycarbonate / acrylic) 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 Lined MS Tubular Sight Flow Indicator showing numbered components

FAQ

Questions we are asked about this item.

Yes — borosilicate 3.3 glass, FEP or PFA lining and PTFE gaskets in both. The difference is the external flange metal and the tie rod material.

The catalogue lists acid transfer, agriculture, bleach chemicals, caustic and alkali, pharmaceuticals, waste processing and water treatment.

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