Tecfluid SC-250 - Manual (Page 8)

8
When measuring low pressure gas flow with AISI 316 floats, oscillation of the float often occurs,
which makes it very difficult to read the flow rates. In these cases it is recommended to install a
damper in the instrument.
The damper consists of a piston mounted in the interior of closed cylinder at one end. The
compression forces of the gas absorb the floats oscillations, maintaining it stable in the reading
point.
If you have this problem, consult us to install a damper in your flow meter.
The valves must be closed during work stoppages or at the end of the working day to
avoid sudden surges on starting up, which could damage or bend the float when
forcibly driven during fluid flow.
LIQUID MEASUREMENT.
When measuring liquids the regulation valve should be installed as shown in Figure 4.
The by-pass valve should remain closed. The inlet valve (1) is opened slowly to low flow rate
position, then the meter outlet valve (2) is also opened slowly so as to get rid of the air and then
progressively fully opened.
The required flow is then regulated by using the inlet valve.
Close the valves during work stoppages or, at the end of the working day to stop sudden
surges when started up. If the float hits the stops sharply this could cause damage to the
meter.
A FILTER PRIOR TO THE METER IS RECOMMENDED. If the fluid also contains magnetic
particles, which could adhere to the float and jam it, a magnetic filter must be placed at the meter
inlet.
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