Troubleshooting; Reducing Outlet Pressure Fluctuations - GF NeoFlow Betriebsanleitung

NeoFlow pressure reducing valve
8

Troubleshooting

Troubleshooting must be exclusively handled by authorised service personnel!
8.1

Reducing outlet pressure fluctuations

The damping valve (DV) can be used to set the reaction time, thus changing the stability of the control loop within the NeoFlow pres-
sure reducing valve can be changed. Reduction of the reaction time can improve the stability of the control loop. This makes the
pressure cycle in the NeoFlow pressure reducing valve less susceptible to pressure fluctuations.
ATTENTION!
Air in the piping system!
Prior to adjusting the dampening screw on the damping valve (DV) flush air out of the system.
► Allow medium to pass through the NeoFlow pressure reducing valve at a suitable flow rate for at least 10 minutes.
ATTENTION!
Oscillation due to low flow volumes!
The pressure fluctuations with low flow rates may cause the NeoFlow pressure reducing valve to oscillate.
► Especially with low flow rates, the damping valve should be correctly readjusted.
CAUTION!
Decreasing the reaction time!
Turning the damping valve (DV) clockwise reduces the flow volume in the control area, which increases the reaction time of the
NeoFlow pressure reducing valve.
► Observe the set reaction time.
8.1.1 Procedure in case of pressure fluctuations
1. In case of outlet pressure fluctuations (apparent at manometer KH5), turn the damping valve (DV) clockwise in increments of 0.5
revolutions until the manometer at KH5 shows a steady value (the reaction time is around 30 seconds). Attention: The damping
valve (DV) may not be less than 2 turns from the closed position.
P1
KH6
AS
KH4
KH1
36
KH2
DV
KH3
KH5
P2
Instruction manual