Flomec D-40, Instruction Manual

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Commissioning 7
3.0 Commissioning Once the meter has been mechanically installed the meter is ready for commissioning.
The meter must NOT be run until the pipework is flushed of foreign matter, more often than not foreign matter is
present after pipework fabrication or modification; weld slag, grinding dust, sealing tape & compound &/or surface
rust are most common offenders.
Flushing can be undertaken by utilizing a by-pass or removing the meter from the pipework. If neither is practical
then the meter rotors must be removed prior to flushing (refer to Maintenance section of this manual for
disassembly).
After flushing or following long periods of shutdown the meter must be purged of air/vapour. This can be achieved
by allowing the liquid to flow through the meter at a slow rate until all air/vapor is displaced. Never run the meter
above its maximum flow or exceed 100kpa (1 bar, 15psi) pressure drop across the meter. Now the meter is ready
for its operation to be confirmed by ensuring correct indication on the mechanical display. Refer if necessary to
fault finding section of this manual.
strainer
flowmeter isolation valve isolation valve
by-pass valve
Open downstream valve last