Yamatake Corporation Installation
ST3000 Smart Transmitter Series 900 Electronic Differential Pressure/Pressure Transmitter 4-19
4-3-3-3 Closed Tank - Piping
Recommended piping for dry leg - Example
When using the dry-leg method, connect the high-pressure side of the transmitter to
the lower part of the tank. Connect the low-pressure side to the gas-sealing pipe of the
tank.
After completing piping work, check for pressure leaks around the connecting pipe,
the transmitter, and the 3-way manifold valve. The following shows a typical installa-
tion.
Always connect the high-pressure side of this transmitter to the lower part of the tank.
Install this transmitter below the lowest liquid level to be measured.
Figure 4-15 Closed Tank -- Piping (Dry-leg Sealing Example)
Liquid level
Gas vent plug
Low-pressure side
High-pressure side
3-way
manifold valve
Main valve
Main valve
Tee
Tee
Tee
Gas vent plug
Drain valve
Drain valve
Vent / Drain plug
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