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Flow ORIFLOMETER® Large sized differential pressure flow meter with multi functionsO7000 Series


O7000 Series PDF

*Specifications are subject to change without prior notice.

The O7000 flow meter consists of an orifice plate and a metal tube variable area flow meter (AM7000).
By measuring a bypass flow of the" large sized" pipes with a" small sized" flow meter, the flow rate in the large pipes can be measured at low cost.
The robust and reliable local indicator can be equipped with the electric output, local flow integration with pulse output, alarm output and communication function to meet various applications.


  • · A large flow through an orifice in the medium to large main pipe can be measured by measuring its small bypass flow at low cost.
  • · Bottom to top, top to bottom, left to right, right to left are acceptable.
  • · Local indication, electric transmitter, local flow integration, pulse output of integrated flow, alarm output and communications are available.
  • · HART and PROFIBUS PA communications
  • · Explosion proof (Certified by TIIS, KOSHA, NEPSI, ATEX and IECEx)
  • · Protection class of indicator IP67

Standard Specifications

Measuring fluid Liquids (Max. viscosity 3 mPa·s) and
Gasses, not suitable for slurry and steam
Flow range Liquids (in case of density: 1.0 g/cm³ and viscosity: 1.0 mPa·s)
 Max. 200 to 3000 m³/h (size: 500 mm, at DP = 60 kPa)
 Min. 3 to 25 m³/h (size: 50 mm, at DP = 40 kPa)

Gases (in case of temperature: 0 °C, and 1 atm)
 Max. 4900 to 72000 m³/h (nor) (size: 500 mm, at DP = 60 kPa)
 Min. 80 to 710 m³/h (nor) (size: 50 mm, DP = 40 kPa)
Fluid pressure For JIS10K class (1.4 MPa at max.120°C, 1.2 MPa at max.200°C)
The maximum allowable pressure is subject to its temperature
Complying with the relevant flange ratings. Consult us for higher pressure services.
Fluid temperature -20°C to 200°C
Pipe sizes and available pressure taps D・D/2 taps 100 to 500 mm (4 to 20 in.)
Corner taps 50 to 500 mm (2 to 20 in.)
Flange taps 50 to 500 mm (2 to 20 in.)
Vena contracta taps 200 to 500 mm (8 to 20 in.)
Consult us for larger sizes, 550 mm (22 in.) or more
Process connection JIS 5K, 10K, 20K
ANSI or JPI CLASS 150, 300, Consult us for others.
Main orifice plate: 
SUS304. SUS316
Orifice ring: 
SS400. SUS304. SUS316
Ball valves: 
C3771BE. SCS14A
SGP. SUS304. SUS316
Bypass orifice: 
SUS304. SUS316
Non-asbestos for liquids
NBR for gasses
Flow meter: 
Main section SUS304 or SUS316
Indication accuracy ±3 % F.S.
Function/Construction Local indication: O7□L
Electric transmitter: O7□E
Electric transmitter + HART communication: O7□H
PROFIBUS PA communication: O7□P
Local integration: O7□T
Reed switch: O7□R
Proximity: O7□N
Microswitch: O7□M