Danfoss APP 13 Installation, Operation And Maintenance Manual page 28

Operating guide
Data sheet
28 | 180R9264 | AQ115586503043en-000903
Installation, Operation and Maintenance APP 11-13
High pressure safety or relief valve:
i) As the Danfoss APP pump begins to create
pressure and flow immediately after
start-up and regardless of any counter
pressure, a safey or pressure relief valve (8)
should be installed after the non-return
valve to prevent system damage and to
avoid high pressure peaks.
Note: If a non-return valve is mounted in the inlet
line, a low-pressure relief valve is also required
between the non-return valve and
pump as protection against high-pressure peaks.
Preferred design - see section 9.2
Media filter
PI
1
PI
Feed
Fresh water
permeat flush
9 3
1
PI PI PT
2
5
6
PI
7
4
PI
Brine
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