6 installing steam prism wash system – K-Patents PR-23-SD Generation 1 User Manual

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Safe-Drive™ Process Refractometer PR-23-SD Best Practices, Generation 1

2. Tighten the large nozzle

nut (

1).

NOTE: Make sure the valve

orientation is correct.

3. Attach the safety cover

over the nozzle nut (

2).

4. Tighten the safety cover

M5 Allen screw (

3).

5. Attach the nozzle guide

plate (

4).

6. Tighten the guide plate

with two (2) M5x10
screws to the welding
body (

5).

7. Tighten the M5x8 screw

to nozzle (

6)..

8. Attach the steam line (

1).

9. Open the steam

connection (

2).

4.6 Installing Steam Prism Wash System

In black liquor service material deposit, scaling or coating may occur on the prism surface.
To avoid this, you need to install an integral prism wash with steam that uses the retractable
nozzle included in the SDI valve.

Important Steam Prism Wash Considerations

● The distance from the steam nozzle on the SDI valve to the steam shut-off valve

should be kept as short as possible to avoid condensate. The recommended length of
the distance is 0.6 m (2 ft) or less.

● Separate or isolate the power to the solenoid from the power to the transmitter by

installing a safety switch. This enables the steam wash to be serviced without having
to power down the whole SD sensor system.

● Pipe the steam trap properly to drain so that the trap is not blowing hot steam.

● Steam piping upstream of shut-off valve is ½” or larger.

OPEN

This manual is related to the following products:

PR-23-SD Generation 2