Flow Chart A - GF NeoFlow Betriebsanleitung

NeoFlow pressure reducing valve
8.2

Flow chart A

The NeoFlow pressure reducing valve is exhibiting a faulty function (e.g. leakage, desired outlet pressure cannot be reached, or
outlet pressure cannot be maintained).
Fittings/Pipes Pilot leakage indicator
Retighten, seal or
replace all leaking
components
Outlet pressure
too high
See flowchart B -
variant 1
Color coding of Set pressure range
the pilot valve (bar [g])
spring
Silver 0.0 - 3.0
Black 1.0 - 8.0*
Red 1.0 - 16.0
*Standard version
38
Yes
REASON:
Error with the
Pilot Valve
ACTION:
Pilot valve main-
tenance
Check outlet
pressure at KH5
Outlet pressure
too low
Does the inlet pressu-
See flowchart B -
variant 2
Sensitivity of the setting
(bar/revolution)
0.18
0.43
1.53
Are there any visible
leaks on the
NeoFlow pressure
reducing valve?
No
Are the ball valves
KH1-KH3 open?
No
Yes
Is the pilot valve
spring color coding
correct for the desi-
red outlet pressure?
Yes
Outlet pressure
unstable
No
re fluctuate?
Yes
REASON:
Network problems
(input pressure too
low)
REASON:
Ball valves closed
ACTION:
Open ball valves and recom-
mission the NeoFlow pressu-
re reducing valve
REASON:
Incorrect pilot valve spring
color coding
ACTION:
No Replace pilot valve spring
and recommission
NeoFlow pressure redu-
cing valve
REASONS:
- Set outlet pressure too high
- Damping valve too wide open
- Air in control chamber
- Control system malfunction
ACTIONS:
- Reset set outlet pressure
- Reset damping valve, see chapter "Reduce
output pressure fluctuations"
- Open KH4 for approx. 20 sec.
- Restart pilot valve
Instruction manual