S-178-10(E）
(2) Carefully follow the valve operations sequence given below. On a new installation, care should be exercised
to prevent the rotors from spinning violently by compressed air.
①
Close the valve A upstream of and the valve B downstream of the meter.
②
Slowly open the valve C on the bypass line to allow the liquid to run through the bypass line, washing away
weld chips, scales or other foreign matter inside the pipeline.
On a newly installed piping assembly, extra care should be used. See page 16 for flushing instructions.
③
Sightly open the valves A and B. Slightly close the valve C if necessary. Make sure to see the counter of the
register slightly moves in response at this time.
④
After a warmup period, slowly close the valve C and progressively open the valves A and B until the rated flow
is reached.
⑤
Flowrate is adjustable with the valve B downstream of the meter. Use the meter within the flow range speci-
fied.
流入方向
FLOW DIRECTION
ストレーナ
STRAINER
バイパスライン
BYPASS LINE
VALVE
バルブ
METER
流量計
A
B
C
CAUTION
In case where the meter is used with heavy oil exceeding
80
℃
in temperature, maintain this condition at least for 10 minutes to obtain
uniform temperature distribution in the measuring chamber.
CAUTION
If you plan to use the water service FlowPet for boiler feed water,
keep the concentration of antiscale/corrosion inhibitor and deoxidizing agent
according to their instruction manuals. Exceeding their prescribed concentration may
lead to corrosion of the meter and other problems.
