Quick exhaust valves VBQF
Subject to change – 2014/02
2
Internet: www.festo.com/catalogue/...
Quick exhaust valves VBQF
Product range overview and type codes
Function
Higher piston speeds can be achieved
onthereturnstrokeofsingleand
double-acting drives with the quick
exhaust valves VBQF.
Compressed air flows from the control
valve via the VBQF to the drive. The
exhaust port 3 is closed at this time.
When the pressure at 1 falls, exhaust
flow occurs from 2 to 3.
In order to implement a quick exhaust,
the VBQF must be attached directly to
the supply port of the drive. The VBQF
can be mounted in any position and
can also be turned.
The VBQF is available with or without
silencer.
Features:
• Minimal height
• High flow rate
• Improved noise emissions
• Can be rotated (continuous rotati on
of the connecti on must, however, be
avoided)
Product range overview
Function Version Type Pneumatic connection P age/Internet
1(valve) 2(drive)
Quick exhaust valves Flat design
VBQF-U With silencer Gx,
QS-6
Gx 3
G¼,
QS-8
G¼
VBQF-D Without silencer Gx,
QS-6
Gx 3
G¼ G¼
Compact design
SEU With silencer Gx,G¼,Gy,G½ Gx,G¼,Gy,G½ seu
SE Without silencer Gx,G¼,Gy,G½,
G¾
Gx,G¼,Gy,G½,
G¾
se
Type codes
VBQF
– U – G18 – E
Type
VBQF Quick exhaust valve, flat design
Exhaust air
U Unducted exhaust air
D Ducted exhaust air
Pneumatic connection 2 (drive)
G18 Thread Gx
G14 Thread G¼
Pneumatic connection 1 (valve)
E Threaded connection, like pneumatic connection 2 (drive)
Q6 Push-in connector QS-6
Q8 Push-in connector QS-8
2014/02 – Subject to change
3
Internet: www.festo.com/catalogue/...
Quick exhaust valves VBQF
Technical data
Unducted exhaust air VBQF-U
Ducted exhaust air VBQF-D
-M- Flow rate
2,500 l/min
-Q- Temperature range
–20…+80°C
-L- Operating pressure
0.5 … 10 bar
General technical data
Exhaust air Unducted exhaust air VBQF-U Ducted exhaust air VBQF-D
Pneumati c connection 2 (drive) Gx G¼ Gx G¼
Pneumati c connection 1 (valve) Gx QS-6 G¼ QS-8 Gx QS-6 G¼
Pneumati c connection 3 (exhaust air) – (silencer) – (silencer) Gx QS-8 G¼
Valve function Quick exhaust
Nominal size [mm] 5 7 5 7
Type of mounting Screw-in
Mounting position Any
Noise level [dB (A)] 75 75 – –
Operating and environmental conditions
Type of connection Threaded connection Push-in connector QS
Operating pressure [bar] 0.5 … 10
Operating medium Compressed air in accordance with ISO 8573-1:2010 [7:4:4]
Note on operating/pilot medium Operation with lubricated medium possible (in which case lubricated operation will always be required)
Ambient temperature [°C] –20 … +80 –10 … +60
Temperature of medium [°C] –20 … +80 –10 … +60
Corrosion resistance class CRC
1)
1
1) Corrosion resistance class 1 according to Festo standard 940 070
Components subject to low corrosion stress. Transport and storage protection. Parts that do not have primarily decorative surface requirements, e.g. in internal areas that are not visible or behind covers.
Materials
Housing Die-cast zi nc, die-cast aluminium
Seals NBR
Note on materials RoHS-compliant
Subject to change – 2014/02
4
Internet: www.festo.com/catalogue/...
Quick exhaust valves VBQF
Technical data
Dimensions Download CAD data www.festo.com
Unducted exhaust air VBQF-U Ducted exhaust air VBQF-D
1 Silencer
Type Connecti on
D1
D2 D3 B1 H1 H2 L1 L2 ß
VBQF-U-G18-E
Gx
Gx –
25 27.4 5.3
37
8 12
VBQF-U-G18-Q6
QS-6 – 41
VBQF-U-G14-E
G¼
G¼ –
32 38 6.2
54
10.5 15
VBQF-U-G14-Q8
QS-8 – 58
VBQF-D-G18-E
Gx
Gx Gx
25 33.9 5.3
37
8 12
VBQF-D-G18-Q6
QS-6 QS-8 41
VBQF-D-G14-E G¼ G¼ G¼ 32 42 6.2 54 10.5 15
Ordering data
Version Pneumatic connection Standard nominal flow rate qnN
at 6 bar } 5bar
Standard flow rate qn
at 6 bar } 0bar
Weight Part No. Type
Pressurisation
1 } 2
Exhausting
2 } 3
Exhausting
2 } 3
2 1 3 [l/min] [l/min] [l/min] [g]
Unducted exhaust air
Gx Gx – 350 – 1,300 84.2 547531 VBQF-U-G18-E
QS-6 – 350 – 1,300 85.5 547532 VBQF-U-G18-Q6
G¼ G¼ – 960 – 2,500 226 548001 VBQF-U-G14-E
QS-8 – 800 – 2,500 232 548002 VBQF-U-G14-Q8
Ducted exhaust air
Gx Gx Gx 350 850 1,300 102.5 547533 VBQF-D-G18-E
QS-6 QS-8 350 850 1,300 105 547534 VBQF-D-G18-Q6
G¼ G¼ G¼ 960 1,500 2,500 253 548003 VBQF-D-G14-E
