Troubleshooting - Festo VZQA-C-M22U Serie Manual De Instrucciones

1. Depressurise the pipeline and the pilot line of the pilot medium.
2. Empty the pipeline and valve completely.
– Allow the valve and pipeline to cool.
– Make sure no one is located in front of the outlet opening.
– Catch discharging media in a suitable container.
3. Disconnect the pilot line from the valve.
4. Loosen the line connections and dismantle the valve from the line.
10 Environment and disposal
• Dispose of the product while observing environmental protection regulations.
When doing this also take residual media into account (potential recycling of
hazardous waste).
11

Troubleshooting

Fault Possible cause
Valve does not close or Medium pressure is too high or
closes too slowly pilot pressure is too low
Medium is too heavily
contaminated
Valve or pilot line is clogged or
cartridge is defective
Valve does not open or Medium pressure is too low or
opens too slowly pilot pressure is still present
Cartridge defective
Pilot air is getting into
the operating medium
or vice versa
Fig. 4
12 Technical data
VZQA-C-M22U-...
Design
Nominal size (DN)
Actuation type
Sealing principle
Mounting position
Valve function
Direction of flow
Reset method
Type of control
Operating pressure [bar]
Process valve nominal pressure (PN)
1)
Differential pressure [bar]
Bursting pressure [bar]
Overload pressure [bar]
Pilot pressure [bar]
Standard nominal flow rate [l/min]
b value
C value [l/sbar]
Switching time on [ms]
Switching time off [ms]
Pilot medium
Operating medium
Max. viscosity [mm²/s]
Temperature of medium [°C]
Ambient temperature [°C]
Product weight [g]
Type of mounting
Process valve connection
Pilot air port 12
Note on materials
– Housing
– Housing cover
– Seals
– Shut-off element
1)
Differential pressure between pilot pressure and medium pressur
Fig. 5
Remedy
• Establish a differential pressure
of at least 2.5 bar (increase pilot
pressure and/or lower medium
pressure)
• Replace the cartridge
• Increase medium pressure or
disconnect pilot pressure
• Replace the cartridge
GG-... TT-...
Pneumatically actuated pinch valve
15
Pneumatic
Soft
Any
2/2-way, single solenoid, open
Reversible
Rebound resilience
External
0 ... 4
10
2.5
16
7.8
1 ... 6.5
12800
0.85
33.44
250
250
– Compressed air ISO8573-1:2010[7:4:4]
– Compressed air ISO8573-1:2010[-:-:-]
4000
-5 ... 60
-5 ... 60
440
In-line installation
G½ NPT½
Gx
High-alloy stainless steel (1.4435)
Fluoro elastomer (FPM)
Nitrile rubber (NBR)
e