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<3. INSTALLATION, PIPING AND WIRING>
3-11
IM 12T03A01-02E
3.3.3 Steam Piping
This is installed to heat measuring liquid whose pour point is high, and to decrease its viscosity.
The sampling unit with steam trace pipes should be used for this purpose.
Connect a pipe from steam source to the sampling unit ‘STEAM IN’ inlet. The sample liquid
conduit also should have a steam tracer pipe. Steam of pressure 0.3 to 0.5 MPa and temperature
of 140 to 160°C is preferable.
Installing the tracer pipe for the sample liquid conduit should be performed after pressure
retentive and leak test of the conduit.
Notes for the tracer piping are as follows.
(1) The tracer pipe of the sample liquid conduit should be installed such that the entire conduit
can be heated. The pipe should also be covered with insulating material (see Figure 3.17).
(2) The steam trap discharge outlet should be open to the atmosphere (see Figure 3.18).
Sampling line
Heat insulating material
Trace pipe
Figure 3.17 Steam Tracer Pipe
Sampling unit
Drain pit
Steam trap
Figure 3.18 Piping at Steam Trap Discharge Outlet
3.3.4 Piping for Air Purge
If the density converter is installed in dusty environment, air purging is recommended.
Air purge should be performed continuously by clean dried air with pressure of 50 kPa G. Size
ø6 x ø4 mm copper or stainless pipe should be used to connect air source to the purge air inlet of
the converter.
The air inlet is Rc1/8 female connection. If specified, a connector for an Rc1/4 female or 1/4NPT
female screw is provided.
5th Edition : Dec. 11, 2015-00