Troubleshooting - Festo VZBA R Serie Instrucciones De Utilizacion

· Before installation, perform a functional test.
The ball valve must be able to be brought correctly to the end positions. Ball valves
with obvious operative malfunctions must not be installed.
· Ensure that the equipment is free of tension during installation.
· When installing a semi−rotary drive, observe the documentation for the semi−ro
tary drive.
· Avoid piping connection additional forces.
The ball valve design takes into account normal stress during operation within the
pipes. In piping systems subject to temperature fluctuations, longitudinal and
bending forces can occur.
· Use appropriate attachments on the process valve to prevent such forces.
The ball valves have a female thread to DIN 2999 on the piping connections and
must be screwed to the pipeline with appropriate fittings.
· Use appropriate sealing material on the pipe connections.
· Screw the pipeline into the connecting thread of the ball valve.
· Check the connection points for leaks.
8 Commissioning
· Make sure that the permissible pressure range of the product is not exceeded
(è Technical Data).
The actuating elements of the ball valves are adjusted to the permissible strengths
of the shaft and ball. Changes to these components are impermissible and may
result in damage.
9 Operation
· Make sure that the permissible limit values are always adhered to (è see
Technical Data). The pressure−temperature diagram shows the permissible
operating pressures (è Fig. 4).
The permissible operating pressure sinks as a function of the temperature of the
medium.
1
Permissible
1
operating
pressure p [bar]
2
Temperature of
medium t [°C]
Fig. 4
10 Service and maintenance
The ball valves VAPB are maintenance−free. For the sake of operational safety, it is
recommended to switch them at least once or twice a year. Depending on the oper
ating conditions, the ball valves and connection points should be checked period
ically for leaks.
When used in a dust−laden environment, surfaces and control elements must be
cleaned regularly. The cleaning intervals depend on the amount of dust occurring
and the surface temperature generated by the fluid.
11 Disassembly and repairs
Prior to dismantling:
· Completely depressurise the pipeline and the process valve.
· Make sure that the process valve has been completely drained.
Especially for toxic, combustible or explosive media, make sure that:
· There is nobody in front of the outlet orifice during opening.
· The pipeline must be completely drained and rinsed before disassembly in order
to avoid risks from hazardous media.
Recommendation: Return the product to our repair service for overhaul.
Repairs may be performed only by trained personnel using the sets of wearing
parts from Festo. You can find information about spare parts and auxiliary means
at www.festo.com/spareparts.
12

Troubleshooting

Fault Possible cause
Leakage at the control Wear of the sealing elements
shaft (packing gland) on the control
shaft
Leakage in the ball Spherical seal damage by solids
valve passage in the medium
5) Observe the spare parts catalogue in the Internet (è www.festo.com/spareparts).
Fig. 5
2
Remedy
· Re−adjust packing gland nut
· Contact our repair service.
1)
· Replace spherical seals
13 Technical data
General technical VZBA−...−R
data VZBA
Connection to process è Type code Fig. 2
valve
Type of mounting In−line installation
Operating medium p g Neutral fluids (pH value 7.0)
Neutral gases (noble gases non−valent, non−aggressive
gases)
Compressed air
Actuation type Mechanical
Sealing principle Soft
Flange hole pattern è Type code Fig. 2
Constructional design L− or T−hole è Type code Fig. 2
Temperature of [°C] 10 ... +140; è Fig. 4
medium
Nominal pressure, [bar] 63; è Fig. 4
process valve PN
Switching position display Slot direction = flow direction
Direction of flow Reversible
Flow tolerance Kv [%] +/− 20
Material information
Seals Polytetraflouroethylene
Housing High−alloy stainless steel (1.4408)
Ball High−alloy stainless steel (1.4401)
Shaft High−alloy stainless steel (1.4401)
Note on materials Contains PWIS (paint−wetting impairment substances)
CE symbol (see declaration of In accordance with EU pressure equipment directive
conformity)
1) Applies only to product designs with a nominal diameter DN of › 40 mm
Fig. 6
VZBA−...−R Actuation
torque
2)
[Nm]
VZBA−R14−63−32L−F0304−R 8
VZBA−R14−63−32T−F0304−R 8
VZBA−R38−63−32L−F0304−R 8
VZBA−R38−63−32T−F0304−R 8
VZBA−R12−63−32L−F0304−R 8
VZBA−R12−63−32T−F0304−R 8
VZBA−R34−63−32L−F0405−R 11
VZBA−R34−63−32T−F0405−R 11
VZBA−R1−63−32L−F0405−R 18
VZBA−R1−63−32T−F0405−R 18
VZBA−R114−63−32L−F0405−R 26
VZBA−R114−63−32T−F0405−R 26
VZBA−R112−63−32L−F0405−R 32
VZBA−R112−63−32T−F0405−R 32
VZBA−R2−63−32L−F0507−R 37
VZBA−R2−63−32T−F0507−R 37
1) TG=T−hole, straight flow, TE=T−bore, angular flow
2) Required torque for actuating the valve, pressure−dependent, specified for P = 63 bar, and [DP = 1 bar]
3) Flow of water at 15°C and at a delta p of 1 bar, measured according to VDI/VDE 2173
4) Smallest diameter flowed through
Fig. 7
Flow rate Kv Interior Nominal
Drill hole diameter size (DN)
3) 4)
[m3/h] [mm]
1) 1)
L TG TE
4,5 11,6 8
8 4,5 11,6 8
4,5 12,5 10
8 4,5 12,5 10
4,7 12,5 15
8,3 4,8 12,5 15
5,1 15 20
8,3 4,8 15 20
11,8 20 25
22,4 10,9 20 25
19,6 25 32
36,5 18 25 32
33,2 32 40
62 30 32 40
53,7 40 50
100 48,8 40 50
1)
Product
weight
[g]
700
700
700
700
700
700
1000
1000
1600
1600
2800
2800
3800
3800
7400
7400