Vaisala PR-23 Series User Manual

Table 3 Wash medium parameters for integral wash nozzles in PR‑23‑AP
/GP
Minimum
abo
ve process
pressure
Maximum
above process
pressure
Wash time Recovery Interval
Steam (SN) 2 bar (30 psi) 4 bar (60 psi) 3 s 20 … 30 s 20 … 30 min
Water (WN) 2 bar (30 psi) 4 bar (60 psi) 3 s 20 … 30 s 20 … 30 min
High pressure
w
ater (WP)
15 bar (220 psi) 40 bar (600 psi) 10 s 20 … 30 s 10 … 20 min
Table 4 Wash medium parameters for flo
w cell wash nozzle AFC
Minimum
abo
ve process
pressure
Maximum
above process
pressure
Wash time Recovery Interval
Steam (SN) 3 bar (45 psi) 6 bar (90 psi) 3 … 5 s 20 … 30 s 20 … 30 min
Water (WN) 3 bar (45 psi) 6 bar (90 psi) 10 … 15 s 20 … 30 s 10 … 20 min
High pressure
w
ater (WP)
25 bar (350 psi) 35 bar (500 psi) 10 … 15 s 20 … 30 s 10 … 20 min
Table 5 Wash medium parameters for Safe‑Driv
e isolation valve nozzle SDI
CONC %
v
alue
Minimum
above
process
pressure
Maximum
above
process
pressure
Wash time Recovery Interval
Steam (SN) 10 … 30 % 2 bar (30 psi) 4 bar (60 psi) 2 … 3 s 20 s 120 … 360 mi
n
30 … 60 % 3 bar (45 psi) 6 bar (90 psi) 3 s 20 s 20 … 60 min
60 … 90 % 4 bar (60 psi) 8 bar
(120 psi)
3 … 5 s 20 s 15 … 25 min
High pressure water (WP) 25 bar
(3
50 psi)
30 bar
(435 psi)
10 … 15 s 20 s 5 … 20 min
In steam wash, do not exceed the recommended wash times, because some
pr
ocess media can burn to the prism surface if steamed for longer time. In case of
coating, shorten the wash interval.
For the Automatic wash cut parameter, see Setting prism wash parameters (page 82).
CAUTION!
In water wash, water temperature should be above the process temperature.
PR-23 Series User Guide
IM-EN-PR23-E
38

Vaisala PR-23 Series Specifications

General

Brand	Vaisala
Model	PR-23 Series
Category	Measuring Instruments
Language	English