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General Catalog 765-01
DB Series
DB Series
Orifice plate, flow-meters
DB Series

• For agressive liquids
• Direct reading indicator on pipes from ND 50 up to 200
• Mounting in all positions
• According standard NF X 10-102
• Options: Flow contact; Output signal


- Clean waters: Tap water, swimming pool water
- Aggressive liquids (acidic or basic)


Wafer mounting: The orifice plate is inserted between 2 flanges. The differential pressure is between the inlet and outlet, one on each side of the plate. The differential pressure is related to the flow rate inside the main pipe. The flow indicator is part of the bypass, allowing a direct reading.

In order to obtain a proportional relation to the main flow, a BORDA nozzle is inserted before the flow indicator.

Option with output signal:
Instead of an indicator, a flow transmitter may be installed.

Flow ranges   From 2 up to 350 m³/h (water)
Accuracy   ± 4 %
Repeatability   ± 0,4 %
Scale amplitude   2 to 10
Pressure limit   10 bar (water at 20°C)
Temperature limits   PVC: 50 °C; PPH: 90 °C;
    PVDF: 120 °C
Pressure drop   On request
Orifice plate (standard)   PVC
Associated flow indicator   PVC or polysulfone
Diver   PVDF
Bypass   Same as the orifice plate
Stop valves   Same as the orifice plate
Seals   EPDM
BORDA injector   PVC, PPH or PVDF

- Reed contact: See data-sheet da731-03
- Output signal: Transmitter on request

General Catalog 765-01
17/12/2019 16:35
Orifice plate, flow-meters
DB Series
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