ABB SensyMaster FMT430 - Assembly of the Pipe Component; Wafer Type Design (FMT091) and Partial Measuring Section (FMT092)

32 SensyMaster FMT430, FMT450 THERMAL MASS FLOWMETER | OI/FMT430/450-EN REV. B
… 6 Installation
Assembly of the pipe component
When installing the pipe components, observe the following
points:
• During installation, it is important to ensure that the flow
direction corresponds to the attached label.
• When welding the welding adapter, remember to observe
the relevant welding instructions. The amount of heat
introduced must be kept to an absolute minimum to
prevent warping of the mounting flange's sealing surface.
• In the case of flanged connections, flat gaskets must be
installed, which should be in perfect condition and
resistant to the measuring media.
• Before installing pipe components or sensors, check all
components and gaskets for damage.
• Pipe components must not be installed under tension,
otherwise the piping may exert impermissible forces on
the device.
• When assembling the flanged connections, use screws
that offer the required strength and dimensions.
• The screws must be tightened evenly and to the required
torque.
• Once the pipe components have been installed, the
insertion connection must be sealed by means of a blind
flange plus gasket or by closing a shut-off device (if
present).
Wafer type design (FMT091) and partial
measuring section (FMT092)
1
Flange screw
2
Washer
3
Flange
4
Flange gasket
5
Pipe component
6
Sensor connection
7
Centering pin, outflow side
8
Nut
Figure 18: Installing a pipe component (example, wafer type design)
1. Position the pipe component coplanar and centered between
the piping. The flow direction must correspond to the arrow
indicated on the pipe component. The centering pin on the
pipe component must be located on the outflow side (behind
the measuring point).
2. Install gaskets between the sealing surfaces.
Note
For achieve the best measurement results, make sure the
gaskets fit concentrically with the pipe component.
• The inside diameter of the pipe and flange must precisely
match in the wafer type design. Any differences in levels or
edges, or untidy weld seams, will reduce the measuring
accuracy.
• To guarantee that the flow profile is not distorted, the
gaskets must not protrude into the piping.