
20
Flow diagram
In-service Test Procedure
Note!
All measurements and results should be recorded in the Log Book.
Start
Measure and record supply temperatures,
pressures and make sure that they are within
the valve specification.
Measure and record blend temperature
(Tb)
and flow rate.
Has
flow rate fallen
significantly or fallen below
minimum flow
specification
?
Yes
Yes
No
No
Has
flow rate improved
?
Check and clean checkvalves,
strainers and outlets.
Measure and record blend
temperature
(Tb)
and flow rate.
Yes
No
Has
blend temperature
changed by more than
2 °C from previous
recorded value
(Tb)
?
Carry out a Performance Check.
Refer to the Commissioning Procedure.
Finish
Refer to Fault Diagnosis
Carry out the
Commissioning Procedure.