Festo VZQA-C-M22U series, Operating Instructions

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9 Disassembly
Warning
Risk of injury from combustion and chemical burns.
The media in the piping system and the valve can be hot and under pressure.
Medium residues can be in the product and escape when open or dismantled.
Allow the valve and piping to cool and depressurize them.
Wear specified protective equipment.
Note
Disassembly only by qualified specialized personnel.
Do not reach into the opening of the valve.
1. De-pressurise the piping and the operating medium line.
2. Allow the valve and pipeline to cool.
3. Empty the piping and valve completely.
– Make sure no one is located in front of the outlet opening.
– Catch discharging media in a suitable container.
4. Disconnect the operating medium line from the valve.
5. Disconnect the piping connections and remove the valve.
10 Disposal
Observe the local specifications for environmentally friendly disposal.
Dispose of the product in an environmentally friendly manner. When doing this,
also take residual media into account (potential recycling of hazardous waste).
11 Fault clearance
Malfunction Possible cause Remedy
Valve does not close or
closes too slowly Medium pressure is too high
or operating pressure too
low Establish a differential pressure of
at least 2.5 bar (increase operating
pressure and/or lower medium
pressure)
Medium is too heavily con­
taminated
Valve clogged Clean valve or replace seal cartridge
Pilot line clogged Clean or replace pilot line
Seal cartridge defective Replace seal cartridge
Valve does not open or
opens too slowly Medium pressure too low Increase medium pressure
Medium causes gluing of the
shut-off element, because
the material of the shut-off
element is not suited for the
medium Replace product with a product
variant made of appropriate
materials
Operating pressure is still
present Switch off the operating pressure
Medium is getting into
the operating medium
or vice versa Seal cartridge defective Replace seal cartridge
Fig. 6
12 Technical data
General
VZQA-C-M22U-...
-6 -15 -25
Design Pinch valve, pneumatically actuated
Nominal size DN 6 15 25
Actuation type Pneumatic
Sealing principle Soft
Mounting position any
Type of mounting In-line installation
Valve function 2/2-way, monostable, open
Direction of flow Reversible
Reset method Rebound resilience
Type of pilot control Externally actuated
Switching time on [ms] 125 250 250
Switching time off [ms] 125 250 250
Flow rate Kv
1)
[m
3
/h] 0.7 5.0 18
Medium pressure [bar] 0 … 4
Nominal pressure of process valve PN 10
Differential pressure
– VZQA-...-N, VZQA-...-E [bar] 2.5
– VZQA-...-S1 [bar] 2.5 3.0
Burst pressure [bar] 16
Operating pressure [bar] 1.0 … 6.5
Operating medium
– VZQA-...-N Compressed air in accordance with ISO8573-1:2010 [7:4:4]
– VZQA-...-E Compressed air in accordance with ISO8573-1:2010 [7:4:1]
– VZQA-...-S1 Compressed air in accordance with ISO8573-1:2010 [7:4:4]
Medium
– VZQA-...-N Compressed air in accordance with ISO8573-1:2010 [-:-:-]
– VZQA-...-E Compressed air in accordance with ISO8573-1:2010 [-:-:1],
water
– VZQA-...-S1 Compressed air in accordance with ISO8573-1:2010 [-:-:-]
Food­safe
– VZQA-...-E Supplementary material information
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www.festo.com
– VZQA-...-S1 Yes, declaration of conformity
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www.festo.com
Max. viscosity [mm²/s] 4000
Temperature of medium
– VZQA-...-N [°C] –5 … +60
– VZQA-...-V4E [°C] –5 … +100
– VZQA-...-ALE [°C] –5 … +100
– VZQA-...-POME [°C] –5 … +80
– VZQA-...-V4S1 [°C] –5 … +150
– VZQA-...-ALS1 [°C] –5 … +150
– VZQA-...-POMS1 [°C] –5 … +80
Ambient temperature [°C] –5 … +60
Storage temperature [°C] 8
Product weight
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www.festo.com/catalogue
Process valve port
– VZQA-C-M22U-...-G G¼ G
½
G1
– VZQA-C-M22U-...-T NPT¼ NPT
½
NPT1
– VZQA-C-M22U-...-S1 Clamp in accordance with ASME BPE, type A
– VZQA-C-M22U-...-S5 Clamp in accordance with DIN 32676-A
– VZQA-C-M22U-...-S12 Clamp in accordance with ASME BPE, type B
Operating medium port 12 M5 G
Á
G
Á
Housing material
– VZQA-C-M22U-...-V4 High-alloy stainless steel (1.4435)
– VZQA-C-M22U-...-AL Wrought aluminium alloy
Housing cover material
– VZQA-C-M22U-...-V4 High-alloy stainless steel (1.4435)
– VZQA-C-M22U-...-AL Wrought aluminium alloy
– VZQA-C-M22U-...-POM POM
Material of seals FPM
Material, shut-off element
– VZQA-...-N NBR
– VZQA-...-E EPDM
– VZQA-...-S1 Silicone
1) At +20 °C, medium pressure 1 bar at the valve input, free outlet
Fig. 7
Tightening torque
VZQA-C-M22U-...
-6 -15 -25
Housing cover material V4/AL V4/AL POM V4/AL POM
Housing cover, customer interface,
connection type G/T [Nm] 15 35 8 40 10
Housing cover with housing
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Mounting instructions for seal cartridge VAVC
Fig. 8