STEEL CASE BULKMETER DM SERIES
The ultimate loading meter
The Avery Hardoll Steel Bulkmeter is specifically designed to meet the rigorous demands of the modern tank truck loading depot. It provides the highest level of repeatability and accuracy combined with minimal down time for service, without the inconvenience and cost of double casing.
The positive displacement principle is the only accurate method of measuring liquid flow. No other technology e.g. turbine meters can achieve the same level of accuracy. This is particularly true in depot applications where flow rates, pressure and temperature can vary during a delivery. The Avery Hardoll Bulkmeter positively measures fluid volume with minimum scope for error and with minimal effect from pressure variations, temperature change or turbulence from near by valves or bends etc.
The product enters the meter and causes the rotor to revolve by pressure on the vanes.The proximity of the rotor to the body forms an efficient seal, whilst the profile of the body ensures that the vanes are guided through the measuring crescent , where the volume of product is accurately measured.
An extension shaft driving through a pressure tight gland in the meter front cover, transmits the rotor revolutions either directly to a pulse transmitter or through gearing to a stepless mechanical calibrator driving the counter.
Avery Hardoll bulkmeters can be used on all petroleum products of all viscosities that are normally pumped. However there is obviously an increase in pressure drop with more viscous fuels which will, under normal circumstances, limit the maximum flowrate obtainable.It is recommended that the pressure drop through a bulkmeter should not exceed 15 psi (1 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 (1 bar) for continuous running at half speed.