Flow Indicator



  • Differential Pressure across orifice plate assembly
  • Weld Neck Flange connection
  • Unit of measurement direct in terms of flow unit
  • Weatherproof to IP - 68 (IS 13947 Part 1)

  • Specifications
  • How to Order
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Design Conforms to ISA RP 3.2, DIN 1952, BS 1042, ISO-5167
Plate material SS304, SS316, SS316L as standard. Hastelloy-C, Monel, PP, PVC, PTFE coated, etc. can be given on request.
Types Square edge concentric, Quadrant edged, Conical entrance, Eccentric, Segmenta
Orifice Bore In accordance with ISO-5167, BS-1042, ASME MFC 3M, R.W.Miller, L.K.Spink, AGA-3
Tag Plate In the same material as plate & is welded to orifice plate. Tag plate integral to the Orifice plate (i.e. without welding) can also be offered as a special case.
Vent / Drain Vent or Drain holes are provided as per customer's requirement. Not drilled for orifice bores smaller than 25.4 mm
Flange Union Weld neck, Slip on, Threaded, Socket welded with RF or RTJ facing Orifice flanges are in accordance with ANSI B16.36 with minimum flange rating of 300# for sizes up to 8" or male - female flanges in accordance with ANSI B16.5.
Pressure Tappings Corner tappings are recommended for sizes upto 1 ½"; Flange taps from 2" to 16"; D – D/2 taps for higher sizes.
Gasket CAF as per IS: 2712 Gr 0/1, SS spiral wound + CAF, SS spiral wound + Grafoil, SS spiral wound + PTFE are normally supplied as per process requirement. Other materials available on request.

For RTJ flanges, the plate is fixed on the plate holder. The plate holder is in Soft Iron material & acts as a gasket.
Studs / Nuts ASTM A193 Gr.B7/A-194 Gr.2H as standard, Other material on request.
Jack Screw Carbon Steel ( C1038 heat treated )
Flow Indicator
Dial 150 mm, Aluminium, white background, black markings
Case SS304 / SS316 with bayonet bezel
Protection Weatherproof to IP-68 (IS:13947 part I / IEC:60529)
Window Safety glass (Shatter proof / Toughened glass)
Pointer Light weight, micrometer adjustable
Sensing Bellow in SS316L
Other wetted parts SS316L
Movement SS304 / SS316
Connection ½" NPT (M) as standard (other on request)
Range Minimum 0 to 1000 mm WC
Static Pressure Upto 60 kg/cm2g, Higher Static Pressure on request
Accuracy ± 1% FSD
Blow out disc Provided (top of the case)
Temperature suitability (-) 20°C to 80°C
Optional Three Valve Manifold in SS316, suitable SS tubing and associated instrument fittings