Recommended wash pressures and times - PR-23 - PR-23-AC - PR-23-AP - PR-23-GC - PR-23-GP - PR-23-M - PR-23-RP - PR-23-SD - PR-23-W

PR-23 Series User Guide
Document code
IM-EN-PR23
Revision
K
Language
English
Product
PR-23
PR-23-AC
PR-23-AP
PR-23-GC
PR-23-GP
PR-23-M
PR-23-RP
PR-23-SD
PR-23-W
Document type
User guide

The following tables show the recommended wash pressures and times.

Wash medium parameters for integral wash nozzles in PR‑23‑AP/GP
Minimum above 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 water (WP) 15 bar (220 psi) 40 bar (600 psi) 10 s 20 … 30 s 10 … 20 min
Wash medium parameters for flow cell wash nozzle AFC
Minimum above 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 water (WP) 25 bar (350 psi) 35 bar (500 psi) 10 … 15 s 20 … 30 s 10 … 20 min
Wash medium parameters for Safe‑Drive isolation valve nozzle SDI
CONC % value 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 min
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 (350 psi) 30 bar (435 psi) 10 … 15 s 20 s 5 … 20 min
CAUTION

In steam wash, do not exceed the recommended wash times, because some process 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.

In water wash, water temperature should be above the process temperature.
The check valve pressure drop is 0.7 bar (10 psi).