D-583-2N-E
23
8. OPERATION
8.1 Flushing the Piping Assembly
() On a newly installed piping assembly where
scale, sludge and other foreign matter are
expected, follow the instructions given below,
using a bypass line (Fig. 8.).
(2) If there is no bypass line, install a short pipe
section in place of the flowmeter before flushing
the piping assembly (Fig. 8.2).
(3) Flushing Instructions
) Use clean water.
2) Flushing water velocity should be high
enough - preferably from 4 to 6 meters/sec.
3) Perform flushing for extended periods of
time.
CAUTION: To avoid damage to
the flowmeter, conduct
flushing before meter
installation, or, in the case
of hottap type, with the
probe retracted.
Fig. 8.
8.2 Operation Procedure
() Drainage (in steam service):
To prevent steam hammer, drain the piping assembly completely.
(2) Checking the meter for proper installation:
To ensure safety, inspect connecting bolts, gaskets, etc. for tightness and other condition.
Make sure of the flow direction also.
(3) Leak check:
Fill the meter with fluid and check for any leak.
(4) Upon completion of wiring connections, turn on power:
Verify that the receiving instrument will not register erratic counts with no flow.
(5) Starting up the measurement line:
By starting up the pump or opening up the valve, carefully allow the fluid to flow.
CAUTION: To safeguard the equipment connected, exercise care not to increase
the flowrate sharply.
(6) Checking the operation:
Verify that the receiving instrument registers properly.
Make sure that the fluid conditions (pressure, temperature, etc.) and flowrate conform to the meter
specifications.
DELTA METER
FLOW
DIRECTION
BYPASS LINE
DELTA METER
BLIND
FLANGE
Fig. 8.2
FLOW
DIRECTION
Summary of Contents for EX DELTA II
Page 49: ...D 583 2N E 49...
