Yokogawa SC25V - Manual (Page 11)

11
IM12B6J1-40E-E
5.3 Chemical cleaning HCN
The chemical cleaning system is effective in
processes where deposits can be removed by
a suitable solvent. Good cleaning effects can
be obtained from periodically spraying of an
electrode. EXA PH450G has a built-in wash
timer with programmable wash time, interval
time and relaxation time for automatic cleaning
of the electrodes, preventing pollution of the
pH sensitive parts. After washing, it is possible
to check the response time of the electrodes.
A built-in (no return) nozzle in the spray unit
prevents penetration of the process liquid in the
cleaning system. The standardized dimensions
allow mounting in all flow-, insertion- and
immersion fittings of Yokogawa as well as
back-end mounting on the 4-in-one pH/Redox
electrodes.
Specifications
Materials
Nozzle
: Hastelloy
O-rings : EPDM rubber
Mounting set : Stainless steel
Tubing
: 1/4” (OD Ø) Nylon tubing
Process cond. : Max. 1 MPa (10 bar) at 100 ºC
Part no.
K1547PA : /HCN3, 3-hole flow-, insertion-,
immersion fitting
K1547PB : /HCN4, 4-hole flow-, insertion-,
immersion fitting
K1547PP
(spare tubing, EPDM)
Tubing
O-rings
(11x3)
Chemical cleaning
Figure 9