Chapter HCOTEG174280

Published date15 April 2016
Record NumberHCOTEG174280

All meters need to be full of oil at all times, and sited in such a way that there is noturbulence in the flow ahead of the meter (this usually means there has to be a straightpipe into the meter) and there is nothing in the immediate vicinity of the meter thatcould interfere with the way the meter works – such as vibration.

Type of flow meter and description What the meter measures Main usage and strengths Weaknesses
All meters need to be full of oil at all times, and sited in such a way that there is noturbulence in the flow ahead of the meter (this usually means there has to be a straightpipe into the meter) and there is nothing in the immediate vicinity of the meter thatcould interfere with the way the meter works – such as vibration.
– there are various types involving gears, ovals and screws – effectively they are like a pump working in reverse – a fixed volume is trapped in a chamber of the meter whilst it rotates. All meters need to be full of oil at all times, and sited in such a way that there is noturbulence in the flow ahead of the meter (this usually means there has to be a straightpipe into the meter) and there is nothing in the immediate vicinity of the meter thatcould interfere with the way the meter works – such as vibration.

– this is in fact the only meter that is purely volumetric – its action is solely dependent upon the volume of liquid that passes through the meter. | Accurate at low flow rates – used for tanker loading gantries. | Needs clean fluids. If fluid (such as white spirit) has no lubricating properties the meter will wear out quickly.
Viscous fluids will find it difficult to push through the meter.
Compensations for temperature have to be made. | | All meters need to be full of oil at all times, and sited in such a way that there is noturbulence in the flow ahead of the meter (this usually means there has to be a straightpipe into the meter) and there is nothing in the immediate vicinity of the meter thatcould interfere with the way the meter works – such as vibration.

– the faster the flow the faster it spins. All meters need to be full of oil at all times, and sited in such a way that there is noturbulence in the flow ahead of the meter (this usually means there has to be a straightpipe into the meter) and there is nothing in the immediate vicinity of the meter thatcould interfere with the way the meter works
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