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Jakarta Barat

Flow Meter Avery Hardoll BM 650 Series

Avery Hardoll BM Series flowmeters are precision made, positive displacement, liquid measuring instruments that maintain the higest level of accuracy over a lifetime of operation. Simplicity of design and accuracy has resulted in the Avery-Hardoll BM Series meters to being the most preferred meters by aviation fueling operators and airlines in internatonal markets.

BM Series bulkmeters are manufactured in three basic sizes with different ratings identified by a series number.

The series numbers, sizes, flow rates, and a brief description of each series of meter are shown below.



Serial Number : BM650

Manifolds : 4 inches, 102 millimeters

Flow Rates : 65 – 650 Imperrial Gallons, 300 – 3000 liters

General Description : Triple Capsule Meters



  • The BM Series bulkmeters consist of three main assemblies: the manifold, body assembly and rotor assembly
  • The higher rating of the larger meters is achieved by bolting two or three body capsules together and fitting double or triple rotor assemblies with a larger manifold to suit
  • A calibrating mechanism and mechanical register are also attached to the front end cover
  • The calibrating mechanism can be replaced by a front cover incorporating a pulse transmitter when required for electronic systems, such as MASTERLOAD II™ or MASTERLOAD III™ registers


Spesification :

Meter Series : BM250

Pipeline Size : 4” (102mm)

Flow Rate : 65 to 650 Imp. Gal, 300 to 3000 lpm, 18 to 177 M³/h

Flanges Conform To : ASA 150 FF

Flanges Material : Steel


Viscous Products

Avery-Hardoll bulkmeters can be used on all petroleum products of all viscosities. However there is obviously an increase in pressure drop with more viscous fuels which, under normal circumstances, will limit the maximum flow rate obtainable.

It is recommended that the pressure drop through a bulkmeter should not exceed 15 psi (one bar), above which the load on the bearings will start to cause wear. Consequently when using products with viscosities (at operating conditions) above 100 centistokes, it is necessary to reduce the maximum permitted flowrate. As a guide it is suggested that the pressure drop through the meter should not exceed 10 psi (0.7 bar) for continuous running at maximum speed or 15 psi (one bar) for continuous running at half speed.

Pressure Loss

The low pressure drop for the BM series of Avery-Hardoll bulkmeters is displayed below:


Maximum working pressure: 10.5 bar (150 psi)

Test pressure: 21 bar (300 psi)

Temperature range: -28ºC to 100ºC

Volume per revolution:

  • 2.27 litres (single capsule)
  • 4.54 litres (double capsule)
  • 6.82 litres (triple capsule)

Repeatability (typically): .02%

Calibration :

  • Calibration adjustment is provided to minimize the meter error at any selected flowrate. Adjustment is stepless; no gear changing is necessary; the calibration screw is easily accessible after breaking a seal and removing a sealing screw.
  • All meters are tested to 300 psi (21 bar).
  • All meters are tested before dispatch at a range of flow rates, and test certificates can be supplied if requested.
  • The fluid used for testing is odorless kerosene.
    • Specific gravity at 60/60ºF, 15/15ºC = 0.8
    • Viscosity at 60ºF, 15ºC = 2.4 centistokes.
  • Suggested correction to be made to the calibrating mechanism when used with products with different viscosities as follows:
    • Gasoline + 0.1% + means increase counter readings
    • Kerosene 0.0% – means decrease counter readings
    • Gas Oil – 0.1%
    • Fuel Oil – 0.22%

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