PRIME 4 Installation and Operation Manual
Operation 6
3 Operation
3.1 Start-Up Procedure
When the PRIME 4 meter is first installed in the line, air is in both the line and inside the meter’s rotor. The
air takes some time to work out. If the meter is subjected to hydraulic shock during this vulnerable time, the
rotor can pinch down on the blades and cause blade breakage or cam shaft rotation. By following the
procedure outlined below, the likelihood of meter damage should be greatly reduced.
This procedure should be repeated whenever air has been introduced to the line or meter.
1. If possible, gravity head should be used to initially fill the meter. The upstream valve should be slowly
opened as product is gravity fed through the meter and air is vented from the high point of the meter or
system.
2. After gravity feeding the meter is complete and all air that can be removed during this step has been
removed, close the upstream isolation valve and energize the pump.
3. Slowly open the upstream isolation valve until the meter and flow control valve are just pressurized. It
is important that the upstream valve be just barely open to ensure that the meter is operated between
50 to 75 gallons per minute (gpm).
4. Initiate low flow between 50 and 75 gpm using the electronic preset. It is recommended that multiple
batches of at least 300 gallons be run to ensure all air from the system is expelled.
5. Vent air from the high-point vent until no sign of air being vented is evident.
6. After all of the air has been bled from the system, gradually open the isolation valve and initiate normal
operation.
3.2 General Operating Information
The PRIME 4 meter has been tested on kerosene and the meter median K-factor has been attached. To
obtain maximum service from Smith Meter meters, it is suggested that detailed records be maintained.
Data about the meter—such as the model, serial number, operating rate, type of product, meter clear-
ances, totalizer readings, meter factor, and other pertinent information—should be recorded. Such
information is an excellent guide in scheduling a preventive maintenance program.
Air trapped inside the rotor takes time to be displaced.
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