Spirax Sarco DP27T Installation And Maintenance Instructions Manual page 17

4. Commissioning
Warning
Direct injection systems
This product contains a rust inhibitor to protect it against corrosion during
storage. To avoid any possible contamination of your product, after first
blowing down the approach pipework, we recommend that the valve is blown
through thoroughly in order to remove any trace of the inhibitor.
When the pressure/temperature control is installed and all connections are properly made
it must be brought into operation in two stages a) Pressure reduction. b) Temperature
control.
4.1 To set the reduced pressure
1. Ensure that all connections are properly made and that all valves are closed.
2. Check that adjustment is turned fully anticlockwise until the spring is slack.
3. Open small valve in pressure control line.
4. Blow through the approach pipework by removing the cap and screen from the strainer
protecting the steam trap draining the upstream pipework. Do not remove the screen
from the main line strainer during this operation. Although this should remove most of
the dirt which is present, it may be necessary to examine and clean the main line strainer
at regular intervals.
5. Slowly open the upstream isolating valve until it is fully open.
6. Slowly open the downstream valve until it is fully open.
7. Using a 19 mm A/F spanner slowly turn adjustment screw in a clockwise direction until
desired pressure reading is obtained.
8. Holding the adjustment screw in position, with the spanner, tighten down the lock-nut to
secure the setting of the adjustment spring, making sure that the 'C' washer stays in
position.
IM-P240-02-EN-ISS1 CTLS 17