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6.
To ensure proper operation of the instrument, the medium flowing through the instrument
must be clean and free of impurities such as dust particles. Although our company installs a
miniature filter, it is strongly recommended that customers install the filter upstream as it is not
easy to disassemble and clean.
8 Key points for the operation of the purge device
1.
Check that the primary and secondary pressures are within the specified range.
2.
Check that the pressure variation range is in accordance with the specifications.
3.
For constant primary pressure models, install a pressure reducing valve whenever possible.
If the primary pressure deviates from the set value, adjust the pressure to reduce the deviation
so that an accurate flow rate can be obtained.
4.
Flow rate setting: When filling the purge device with a fluid or when adjusting the flow rate,
a needle valve should be used. Before operating the purge device, close the valve tightly. When
operating, open the valve slowly to avoid sudden changes in flow rate until the needle and dial
of the flow meter indicate the set value. Do not close the valve provided with the purge device.
5.
When operating, be careful not to allow fluid to be rapidly injected into the purge device
through the valve on the flowmeter. Otherwise, the float in the flowmeter will rise rapidly and
damage the flowmeter.
6.
Particular attention must be paid to ensure that the medium flows in the same direction as
that required by the instrumentation. Before installing the instrument, all the fine adjustment
needle valve should be closed.
7.
When measuring liquids, the pipeline should be drained and purged before operation to
avoid shock effects. Open the valve slowly.
8.
For gas measurement, open the valve slowly to adjust the pressure to the operating
pressure.
9.
For panel-type modular models, a pressure-reducing filter is usually installed at the inlet. It
should be noted that in normal operation, the pressure value should be adjusted according to
the requirements of the order.
9 Maintenance and repair
9.1 Periodic inspection items
The following table indicates standard maintenance items and intervals. The intervals will vary
depending on the fluid and operating conditions. Please consider the actual operating conditions to
determine the intervals and contents as appropriate.
