YOKOGAWA TB820D, User Manual, Page: 20 / 87

<2. INSTALLATION, PIPING, AND WIRING>
2-9
IM 12B01B30-02EN 2nd Edition : June 09 , 2021-00
Table 2.7 Specification of Solenoid valve cable
Cable length (*) 3000 mm or less (*1)
Rated voltage 300V or above
Rated temperature 75°C or above
Specification AWG 20 2-core cable
Sheath outer diameter Ø6.5 to Ø12.5 mm
Cable termination On the terminals of Terminal Box, strip the outer sheath
of 80 mm, provide the termination M3 round.
On the solenoid valve terminals, the cable termination
varies depending on the type of terminal.
(*) The specification shall be satisfied to comply with EMC regulation.
Connect the cable for SV by referring to Figure 2.2 and Figure 2.7.
2.2 Piping
There are three piping methods in accordance with the system configuration.
(1) A system using an open head tank (/D3)
(2) A system using a Simple head tank (/D2)
(3) A system using a pressurized head tank (/D1)
(4) A system without a head tank
Depending on the application, select the appropriate system configuration, and install pipes
accordingly following the procedure described below.
2.2.1 System Using an Open Head Tank (/D3)
This is a typical system and the piping diagram is shown in Figure 2.20. Air bubbles in a sample
are removed by an open head tank and the sample is introduced into the detector at a stable flow
rate. Calibration and maintenance such as measurement cell cleaning are efficiently performed
by valve operation. An optional Open head tank (option code “/D3”), shown in Figure 2.20, is
available from Yokogawa.
Approx.
288
4-ø6.2 holes
(for fixing)
40
9.5
Approx.
205
2-Ø10 holes
(for fixing)
Ø26/Ø19 PE tube coupling
Ø22/Ø15 PE tube coupling
Head tank sample inlet
110
320
Drain
70
280
110
VP20 Pipe
Head pipe drain
Ø22/Ø15 PE tube
Coupling
Sample outlet
Sample inlet Ø22/Ø15
PE tube coupling
30
Unit: mm
Figure 2.20 Open Head Tank (/D3)