Pneumatically Driven Brush Cleaning (Model Fc20-Vp); Chemical Cleaning Hcn - YOKOGAWA FF20 Instruction Manual

4.4.4. Pneumatically driven brush
cleaning (Model FC20-VP)
Parts and Accessoires
Part no. Description
K1520NA Tubing (ø4 mm)
K1520NG Brush holder
K1520NB Brush
K1520NH Piston
K1520NJ Control unit

4.4.5. 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 has a
built-in wash timer with programmable
washtime, 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 standardised
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, like
FU20.
Features
• The EXA analyzer has a built-in timer and
HOLD circuit.
• Built-in (no return) nozzle to prevent
penetration of the process liquid into the
cleaning system.
TUBING
K1520NA
PISTON
BRUSH HOLDER
Figure 4.6 Example FC20-VP
K1547PP
(spare tubing, EPDM)
Figure 4-7 Example HCN4
15
CONTROL
UNIT
O-RING (11x 3)
O-rings
(11x3)
K1500BZ
IM 12B06K01-01E-E