Yamatake STD920 - Figure 4-13 H Mark on Center Body; Liquid Level Measurement - Piping (STD;STG)

Yamatake Corporation Installation
ST3000 Smart Transmitter Series 900 Electronic Differential Pressure/Pressure Transmitter 4-17
4-3-3 :Liquid Level Measurement -- Piping (STD/STG)
4-3-3-1 Piping
Introduction
For measurement by STD type of liquid level in a tank, the piping method depends on
whether the tank is open or enclosed. For enclosed tanks, piping is modified according
to whether you use the gas sealing method (dry leg) or the liquid sealing method (wet
leg).
H mark
H indicating high pressure is marked on the center body of this transmitter. Check the
mark during piping work. The low-pressure side has no mark.
Figure 4-13 H mark on center body
Before your start
The following parts are requirements for piping work. Refer to illustration.
• 3-way manifold valve
•Pipe
• Main valve
• Union or flange
•Tee
• Drain valve
• Drain plug
• Seal pot (for enclosed tank and wet-leg only)
H
L
ow-pressure side
High-pressure sid
e