· Before installation, execute a performance test.
The ball valve must be able to be put correctly into the end position. Ball valves
with detectable operative malfunctions must
not
be installed.
· Ensure that the equipment is free of stress during installation.
· When mounting a semi−rotary drive, observe the documentation for the semi−ro
tary drive.
· Avoid additional piping connector forces.
The ball valve construction takes typical stress in operation within the tubing into
consideration. Longitudinal or bending forces can occur in piping systems that are
subject to temperature fluctuations.
· Use appropriate mountings on the process valve to avoid such forces.
The piping connectors of the ball valves have a female thread to DIN2999 and
must be bolted to the tubing with appropriate fittings.
· Use appropriate sealing material on the pipe connections.
· Screw the pipelines into the connecting thread of the ball valve.
· Check the connection points for tightness.
8
Commissioning
· Make sure that the maximum pressure range of the product is not exceeded
(
è
Technical data).
The actuating elements of the ball valves are harmonised to the maximum forces
of the shaft and ball. Changes to these components are impermissible and can
cause damage.
9
Operation
· Make sure that the maximum limit values are always adhered to (
è
Technical
data). The maximum operating pressures are shown in the pressure−tempera
ture diagram (
è
Fig.4).
The max. permissible operating pressure sinks as a function of the temperature of
the medium.
3
4
1
Connection Rp ¼ ... Rp 1¼
2
Connection Rp 1½ ... Rp 2½
3
Max. permissible operating
pressure
4
Temperature of medium
Fig.4: Pressure−temperature diagram
10
Maintenance and care
The ball valves VAPB are maintenance−free. For the sake of operational safety, it is
recommended to operate them at least once or twice every 3 weeks. This can pre
vent the break−away torque from rising and the gland nut from sticking to the
switch spindle.
Depending on the operating conditions, the ball valves and connection points
should be checked for tightness at regular intervals.
When the device is used in dust−laden environments, surfaces and actuators must
be cleaned regularly. The cleaning intervals depend on the amount of dust present
and on the surface temperature generated by the fluid.
11
Removal and repairs
Before dismantling:
· Completely relieve the pressure in the tubing and the process valve.
· Make sure that the process valve is completely drained.
Especially with harmful, combustible or explosive media, make sure:
· that no one is in front of the outlet orifice when it opens.
· the tubing is completely drained before disassembly, and it must be rinsed in
order to avoid risk from dangerous media.
In this product execution, it is not possible to repair defective products. Defective
products must be replaced.
12
Accessories
· Please select the appropriate accessories from our catalogue www.festo.com/
catalogue
13
Troubleshooting
Malfunction
Possible cause
Remedy
Leakage at the switch
ing shaft
1. Wear on the sealing elements on the
switching shaft
2. Incompatible medium in the ball valve
· Replace ball valve
Leakage at the separ
ate halves of the hous
ing
1. Ball valve was screwed in too tight to
the pipe
2. Bending moments on the ball valve too
high
3. Incompatible medium in the ball valve
4. Temperature too high
5. Pressure too high
· Replace ball valve
Leakage in the ball
valve through−hole
1. Temperature too high
2. Pressure too high
3. Incompatible medium in the ball valve
4. User fault: rotation < 90°
· Replace ball valve
Fig.5
14
Technical data
General technical data
VAPB
VAPB−... (Brass version)
Connection of process valve
Rp
¼
y
½
¾
1
1 ¼
1 ½
2
2 ½
Nominal size (DN)
[mm]
15
20
25
32
40
50
63
Connection of process valve
Rp
è
Type code Fig.2
Type of mounting
In−line installation
Mounting position
Any
Direction of flow
Reversible
Operating medium
Water
Neutral fluids (pH value 7.0)
Neutral gases (inert gases zero−valent, non−aggressive
gases)
Compressed air
Actuation type
Mechanical
Switching position display
Slot direction = flow direction
Sealing principle
Soft
Flange hole pattern
è
Type code Fig.2
Constructional design
2−way ball valve
Temperature
of medium
[°C]
20 ... +150;
è
Fig.4
Process valve nomi
nal pressure
PN 40
è
Fig.4
PN 25
è
Fig.4
Information on materials
Housing
Brass, nickel−plated; CW617N
Ball
Brass, hard−chro
mium plated;
CW614N
Brass, hard−chromium plated;
CW617N
Shaft
Brass; CW614N
Shaft seal
Polytetrafluoroethylene, hydrogenated nitrile rubber
Ball seal
Polytetrafluoroethylene
CE marking (see declaration of
conformity)
No
1)
Yes, per EU
Directive on
Pressure
Equipment
2)
1)
Per 97/23/EG, article 3, sec. 3
2)
Valid only for product versions with a nominal size of DN
50 mm
Fig.6
VAPB−...
(Brass version)
Break−away torque
1)
[Nm]
Flow
rate Kv
Nominal
size (DN)
Product
weight
0 bar
2)
10 bar
3)
PN
4)
[m3/h]
5)
[mm]
[g]
VAPB1/4F40F03
3.1
3.5
5
5.9
15
500
VAPB3/8F40F03
9.4
VAPB1/2F40F03
17
400
VAPB3/4F40F03
4.6
5.1
6
41
20
500
VAPB1F40F0304
6.5
7.2
8.5
70
25
800
VAPB1 1/4F40F0405
10.8
11.9
15
121
32
1300
VAPB1 1/2F25F0405
13.5
14.9
19
200
40
1900
VAPB2F25F05
20
22
29
292
50
3100
VAPB2 1/2F25F07
30
33
45
535
63
1)
Necessary torque to overcome static friction, pressure−dependent, particularly after a relatively long
rest.
2)
Break−away torque at a differential pressure of 0 bar
3)
Break−away torque at a differential pressure of 10 bar
4)
Break−away torque at differential pressure PN
5)
Flow rate of water at 15 °C and at a p of 1 bar, measured per VDI/VDE 2173
Fig.7
