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Flowmeter > O Series [0-100]

O-100 Glass



O-100is series of Orifice bypass flowmeter. The flow through the main pipe is by -passed by an orifice plate. The bypassed flow is indicated by small sized glass tube variable area flowmete flow measurement through main pipe.


· Economical measurement even for large size lines.
· Any flow direction of horizontal, vertical including top to bottom possible.
· No Utility supply needed for local indication.
· Alarm contact optionally available.

Short Specifications

Measuring object Liquids(Viscosity: up to 3mPa·s) and Gases
(Not suitable for slurry and steam)
Flow range Liquid (Water at 20°C)
Max. 700 to 2600m3/h (DP=50kP)
Min. 1.8 to 15m3/h (DP=10kPa)

Gas(Air at 0°C, 0MPa)
Max. 5500 to 55000m3/h(nor) (DP=30kPa)
Min. 25 to 280m3/h(nor) (DP= 5kPa)
Fluid temperature Max. 120°C(Allowable thermal shock 80°C)
Fluid pressure Max. 1MPa
Type of tapping
and available size
1D·1/2D taps: 100A(4B) to 500A(20B)
Corner(Ring) taps: 50A(2B) to 500A(20B)
Flange taps: 50A(2B) to 500A(20B)
Vena contracta taps:  100A(4B) to 500A(20B)
Main orifice: SUS304, SUS316
Orifice rings: SS400, SUS304, SUS316
Ball valve: C3771Be, SCS14A
Bypass piping:  SGP, SUS304, SUS316
Bypass orifice: SUS304, SUS316
Gasket: Non Asbestos (for liquids)
NBR or FPM (for gases)
Flowmeter: Body: SCS14/SS400, SUS304 or SUS316
Tapered tube: Heat-resistant glass
Float: SUS304, SUS316, SUS316L (for liquids)
           Alminium, PFA, PVC, SUS304 (for gase)
Function Local indication
Local indication with alarm contact(1 or 2 point)
Indication accuracy ±3%F.S.
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