Brooks GT1600, Инструкция по установке и эксплуатации

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Section 1
Figure 1-1 Principle of Operation
Design Features
• Configurable to retro-fit GT10xx, GT130x and Full-View
•
360 degrees rotatable viewing angle
• High quality materials for safety, in- and outdoor durability
•
316 stainless steel frame
• Polycarbonate safety shield
• 316/316L dual certified stainless steel process fittings
• Alarms for high- and low flow (optional for all flow ranges, either at time of
order, or as add-on in the field)
• Flanged or threaded connections, available horizontal and vertical
•
Panel- and wall mount options
• Easy in-situ maintenance: Clean or replace tube and float without removal
from the process piping
•
Adjust the scale to compensate for process variation
•
Optional integral needle valve
Principle of Operation
The operating parts of the flowmeter consist of a tapered glass tube and a
float which operates within the tube. The fluid enters the bottom of the tube,
which has the smallest inside diameter (and smallest area), and exits from
the top, which has the largest inside diameter (and largest area). The float is
free to operate between the largest and smallest areas of the tube.
Refer to Figure 1-1.
As the float moves up and down within the tapered tube, the annular area
between the float and tube varies (area increases as the float rises). This
gives the generic name of "variable area meter" for this measurement
principle. As the flow varies, the float will move within the tube until it reaches
an equilibrium position, where the tube taper creates an appropriate annular
area to balance the forces of gravity and the fluids acting on the float.
Refer to Figure 1-2.
Figure 1-2 Cross-Section - GT1600 Flow Tubes with Rib Guides
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