Stroomschema B - GF NeoFlow Betriebsanleitung

Gebruiksaanwijzing
8.3

Stroomschema B

Uitgangsdruk te laag of te hoog
Outlet pressure too high
Ratio of inlet and
outlet pressure
P1/P2 greater
than 4?
No
Turn the adjustment screw on
the pilot valve counterclockwise
and try to achieve the desired
outlet pressure (see chapter
„Setting outlet pressure P2")
Is the outlet pres-
sure P2 stable?
Yes
(set point +/- 0.1
Problem fixed
Turn damping valve 0.5
turns clockwise and wait
30 seconds (max. 2 turns
before closed position)
Is the outlet pres-
sure stable? (set
Yes
point +/- 0.1 bar)
Problem fixed
Network problems
REASONS:
- Valve piston blocked
- Casing body seal leaking
MEASURES:
-Insulate control chamber: Close KH3 at
approx. 4 bar pressure to KH4. Isolate
NeoFlow pressure reducing valve (close
shut-off valve on inlet side). Release
pressure at KH4-6
- Uninstall NeoFlow pressure reducing
valve and check for damage
Neem contact op met uw contactpersoon bij GF Piping Systems als het niet lukt om fouten op te lossen.
Variant 1
No
Inlet pressure P1
too high
Yes
► Adapt design of
network
Yes
bar)
No
1. Open the damping valve (DV)
2. Monitor control chamber pressu-
re with pressure gauge at KH4
3. Adjust adjusting screw on pilot
valve by one full turn in any directi-
No
Unscrew the adjustment screw
of the pilot valve counterclock
wise until the spring is relieved
(according to chapter „Setting
No
Is the
Inlet pressure
No
P1 unstable?
Yes
Inlet pressure P1
too low
► Adapt design of
network
Network problems
Can the target
outlet pressure P2
be achieved?
No
Is the specific flow
rate within the
No
planned operating
range?
Yes
fully counterclockwise
on
Does the control
chamber pressu-
No
re change with
KH4?
Yes
outlet pressure P2")
Does the flow
stop at the
Yes
outlet?
NeoFlow reduceerklep
Variant 2
Outlet pressure too low
Difference between
inlet pressure and
outlet pressure
No
P1-P2
≥ 1 bar?
Yes
Turn the adjustment screw on
the pilot valve clockwise and try
to achieve the desired outlet
pressure (see chapter „Setting
outlet pressure P2")
REASONS:
- Control system blocked
- Flow rate is outside the functional
range of the valve
MEASURES:
- Service control system, see chapter
"Service control system"
- Verify sizing of NeoFlow pressure
reducing valve
REASONS:
- Blockage in the pilot valve
- Leakage in the seal of the
valve piston
MEASURES:
- Clean control block filter
- Maintenance of the control
system
- Maintenance of the valve body
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