Non-return valves VBNF
Subject to change – 2014/09
2
è Internet: www.festo.com/catalogue/...
Non-return valves VBNF
Key features and product range overview
Features
Minimal height
High flow rate
Can be rotated horizontally through
360° in assembled state
Actuation direction 1 can be
changed by repositioning the
housing
1
1
2
3
4
-H- Note
The following sequence must be
observed when assembling the
individual components:
1) Press thrust ring 2 into the
housing until it fits tightly.
2) Insert hollow bolt 3 into the
opening.
3) Push sealing ring OK 4 over
the thread of the hollow bolt.
Product range overview
Function Valve function Design Type Pneumatic
connection 1
Pneumatic
connection 2
qnN è Page/
Internet
[l/min]
Non-return valves Flat design
Piloted non-
return function
VBNF QS-6, QS-8 Gx, G¼ 260 … 620 3
Compact design
Non-return
function
H QS-4, QS-6, QS-8,
QS-10, QS-12
QS-4, QS-6, QS-8,
QS-10, QS-12
136 … 1,715 h-qs
M5, Gx, G¼, Gy,
G½, G¾
M5, Gx, G¼, Gy,
G½, G¾
115 … 5,900 h
Non-return
function
HA M5, Rx, R¼, Ry,
R½
QS-4, QS-6, QS-8,
QS-10, QS-12
138 … 2,230 ha
HB QS-4, QS-6, QS-8,
QS-10, QS-12
M5, Rx, R¼, Ry,
R½
142 … 2,206 hb
Piloted non-
return function
HGL QS-4, QS-6, QS-8,
QS-10, QS-12
M5, Gx, G¼, Gy,
G½
130 … 1,400 hgl
M5, Gx, G¼, Gy,
G½
M5, Gx, G¼, Gy,
G½
130 … 1,600 hgl
-V- New
2014/09 – Subject to change
3
è Internet: www.festo.com/catalogue/...
Non-return valves VBNF
Type codes
VBNF – L BA – G18 – Q6
Type
VBNF Non-return valve, flat design
Design
L L-shaped outlet
Additional function
BA Piloted non-return function, manual exhaust function
Pneumatic connection 2
G18 Thread Gx
G14 Thread G¼
Pneumatic connection 1
Q6 Push-in connector QS-6
Q8 Push-in connector QS-8
-V- New
Subject to change – 2014/09
4
è Internet: www.festo.com/catalogue/...
Non-return valves VBNF
Technical data
Piloted non-return function
-M- Standard nominal flow rate
260 … 620 l/min
-Q- Temperature range
–10 … +60 °C
-L- Operating pressure
0.2 … 10 bar
The non-return valve VBNF-LBA is a
valve with a piloted non-return func
tion and a manual exhaust function.
The piloted non-return function can be
used for a temporary intermediate
stop. If a pilot signal is applied, the
exhaust air can escape. If no pilot
signal is applied, the valve shuts off
the exhaust air from the drive and the
drive stops temporarily.
The integrated manual exhaust
function can be used to manually vent
a pneumatic drive.
General technical data
Valve function Piloted non-return function
Pneumatic connection 2 Gx G¼
Pneumatic connection 1 QS-6 QS-8
Pilot air connection 21 QS-6 QS-8
Type of actuation, piloted non-return function Pneumatic
Manual exhaust function Non-detenting
Type of mounting Screw-in
Mounting position Any
Switching time Off [ms] 9 11
On [ms] 6 8
Nominal tightening torque [Nm] 3 _20% 11 _20%
Rotatability [°] 360 (continuous rotation not permitted)
Operating and environmental conditions
Operating pressure for entire
temperature range
[bar] 0.2 … 10
Pilot pressure [bar] 2 … 10
Operating/pilot medium Compressed air according to ISO 8573-1:2010 [7:4:4]
Note on operating/pilot medium Lubricated operation possible (in which case lubricated operation will always be required)
Ambient temperature [°C] –10 … +60
Temperature of medium [°C] –10 … +60
Storage temperature [°C] –20 … +70
Corrosion resistance class CRC
1)
2
1) Corrosion resistance class CRC 2 to Festo standard FN 940070
Moderate corrosion stress. Indoor applications in which condensation may occur. External visible parts with primarily decorative requirements for the surface and which are in direct contact with the ambient atmo
sphere typical for industrial applications.
Materials
Sectional view
Non-return valve
1 Housing PBT
2 End cap PBT
3 Hollow bolt Wrought aluminium alloy
4 Releasing ring POM
– Cover ES-BE
– Seals NBR
Note on materials RoHS-compliant
-V- New
21
3 4
2014/09 – Subject to change
5
è Internet: www.festo.com/catalogue/...
Non-return valves VBNF
Technical data
Minimum pilot pressure p21 as a function of operating pressure p1
Dimensions Download CAD data è www.festo.com
Type Connection Tubing O.D. B1 B2 H1 H2 H3 H4 L1 L2 L3 L4 L5 ß1
D1 D2
VBNF-…-G18-Q6 Gx QS-6 29.8 15 19.4 5 14.1 1.5 60.3 52.8 23.8 9.7 7.5 12
VBNF-…-G14-Q8 G¼ QS-8 39.5 20.5 28.2 5.6 21 2 76.8 66.8 30 11.1 10 15
Ordering data
Design Pneumatic
connection
Pilot air
connection
Standard nominal flow rate
qnN at 6 bar } 5 bar
Standard flow rate
qN at 6 bar } 0 bar
Weight Part No. Type
2 1 21 [l/min] [l/min] [g]
Gx QS-6 QS-6 260 500 27.3 8001460 VBNF-LBA-G18-Q6
G¼ QS-8 QS-8 620 1,100 65.5 1927027 VBNF-LBA-G14-Q8
-V- New
