Exhaust air flow control valves

Subject to change – 2013/11

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Exhaust air flow control valves

Produ ct range overview

Function

Exhaust air flow control valves are

screwed into the exhaust controls of

control valves or drives. They enable

the piston speed of cylinders or rotary

drives to be controlled by restricting

the air exhaust. This is done using the

adjusting element. The air is

exhausted via an integrated silencer

which reduces the noise level.

Design Valve function Design Type Pneumatic connection 1 qn

Adjusting element  Page/

Internet

[l/min]

Exhaust air

flow control

valve

Sintered metal

Flow control/

silencer function

GRE GÁ,G¼,Gy,G½ 0 … 3,600 Slottedheadscrew 3

Flow control/

silencer

Plastic

Flow control/

silencer function

VFFK M5, M7, Rx,R¼ 0…420 Knurled screw 5

GRU GÁ,G¼,Gy,G½,G¾ 0 … 8,000 Slottedheadscrew 8

1) Standard flow rate

2013/11 – Subject to change

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Exhaust air flow control valves GRE

Technical data

Function

-M- Flow rate

0 … 3,600 l/min

-Q- Temperature range

–10…+70°C

-L- Operating pressure

0…10bar

General technical data

Valve function Flow control/silencer function

Pneumatic connection 1 Gx G¼ Gy G½

Adjustment component Slottedheadscrew

Type of mounti ng Screw-in

Mounting position Any

Max. tightening torque [Nm] – – 15 –

Operating and environmental conditions

Pneumatic connection 1 Gx G¼ Gy G½

Operating pressure [bar] 0…10

Operating medium Compressed air in

accordance with

ISO 8573-1:2010 [7:–:–]

Compressed air in

accordance with

ISO 8573-1:2010 [7:–:–]

Compressed air in

accordance with

ISO 8573-1:2010 [7:4:4]

Compressed air in

accordance with

ISO 8573-1:2010 [7:–:–]

Note on operating/pilot medium Operation with lubricated medium possible (in which case lubricated operation will always be required)

Ambient temperature [°C] –10 … +70

Temperature of medium [°C] –10 … +70

Standard flow rate qn at 6 bar > 0 bar as a function of spindle rotations n

qn [l/min]

Subject to change – 2013/11

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Exhaust air flow control valves GRE

Technical data

Materials

Sectional view

Exhaust air flow control valve

1 Adjusting screw Brass

2 Threaded plug Wrought aluminium alloy

– Seals NBR

Note on materials RoHS-compliant

Dimensions Download CAD data  www.festo.com

Type Connection D1 L L1 ß

D ∅

GRE-x Gx 15 28.5 6.5 14

GRE-¼ G¼ 18.2 34 8 17

GRE-y Gy 25 42 8 22

GRE-½ G½ 27 48 12 24

Ordering data

Pneumatic

connection 1

Standard nominal flow rate qnN

at 6 bar > 5bar

in direction of flow control

Standard flow rate qn

at 6 bar > 0bar

in direction of flow control

Weight Part No. Type

[l/min] [l/min] [g]

Gx 520 0…520 15 10351 GRE-x

G¼ 996 0…996 25 10352 GRE-¼

Gy 2,000 3 … 2,000 50 35310 GRE-y

G½ 3,600 0 … 3,600 75 10353 GRE-½

2013/11 – Subject to change

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Flow control/silencers VFFK

Type codes

VFFK

– C – K – M7 – P

Type

VFFK Flow control/silencer

Design

C Inline

Adjusting element

K Knurled screw

Pneumatic connection 1

M5 Thread M5

M7 Thread M7

R18 Thread Rx

R14 Thread R¼

Additional feature

P Polymer silencer

-V- New

Subject to change – 2013/11

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Flow control/silencers VFFK

Technical data

Functi on

-M- Flow rate

0 … 420 l/min

-Q- Temperature range

0…+60°C

-L- Operating pressure

0…10bar

General technical data

Valve function Flow control/silencer function

Pneumatic connection 1 M5 M7 Rx R¼

Adjusting element Knurled screw

Type of mounti ng Screw-in

Mounting position Any

Type of seal on threaded plug Sealing ring Coating

Nominal tightening torque [Nm] 1.4 _20% 3.8 _20% –

Operating and environmental conditions

Operating pressure [bar] 0…10

Operating medium Compressed air according to ISO 8573-1:2010 [7:4:4]

Note about the operating/pilot medium Lubricated operation possible

Ambient temperature [°C] 0…+60

Temperature of medium [°C] 0…+60

Storage temperature [°C] 0…+60

Materials

Type VFFK-C-K-M…-P VFFK-C-K-R…-P

Silencer insert PE

Threaded plug Nickel-plated brass

Regulating screw Nickel-plated brass

Knurled nut Aluminium

Seals NBR –

Note on materials RoHS-compliant

Standard flow rate qn [l/min] as a function of turns of the adjusting screw n

VFFK-C-K-M5-P VFFK-C-K-M7-P

max

P1 = 1 bar

P1 = 3 bar

P1 = 5 bar

P1 = 7 bar

P1 = 9 bar

Flow rate tolerance: _20%

-V- New

2013/11 – Subject to change

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Flow control/silencers VFFK

Technical data

Standard flow rate qn [l/min] as a function of turns of the adjusting screw n

VFFK-C-K-R18-P VFFK-C-K-R14-P

max

P1 = 1 bar

P1 = 3 bar

P1 = 5 bar

P1 = 7 bar

P1 = 9 bar

Flow rate tolerance: _20%

Dimensions Download CAD data  www.festo.com

VFFK-C-K-M…-P VFFK-C-K-R…-P

Type Connection D2 L1 L2 L3 ß 1

D1 ∅ min. max. min. max.

VFFK-C-K-M5-P M5x0.8 10 22.2 25.8 2.9 19.3 22.9 8

VFFK-C-K-M7-P M7x1 10 25 28.3 5.5 19.2 22.8 8

VFFK-C-K-R18-P Rx 14 29.1 35.8 8 25.1 31.8 10

VFFK-C-K-R14-P R¼ 18 31.1 37 10.8 25.1 31 14

Ordering data

Pneumatic

connection 1

Standard flow rate qn at 6 bar } 0bar Weight Part No. Type

[l/min] [g]

M5 0…80 4.5 133140 VFFK-C-K-M5-P

M7 0 … 100 6.1 133141 VFFK-C-K-M7-P

Rx 0 … 270 13.5 133142 VFFK-C-K-R18-P

R¼ 0 … 420 25 133143 VFFK-C-K-R14-P

-V- New

Subject to change – 2013/11

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Flow control/silencers GRU

Type codes

GRU

– ¼ – B

Type

GRU Flow control/silencer

Pneumatic connection 1

x Thread Gx

¼ Thread G¼

Å Thread GÅ

½ Thread G½

¾ Thread G¾

Generation

B Bseries

2013/11 – Subject to change

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Flow control/silencers GRU

Technical data

Functi on

-M- Flow rate

0 … 8,000 l/min

-Q- Temperature range

–10…+70°C

-L- Operating pressure

0…10bar

General technical data

Valve function Flow control/silencer function

Pneumatic connection 1 Gx G¼ Gy G½ G¾

Adjustment component Slottedheadscrew

Type of mounti ng Screw-in

Mounting position Any

Operating and environmental conditions

Operating pressure [bar] 0…10

Operating medium Compressed air in accordance with ISO 8573-1:2010 [7:–:–]

Note on operating/pilot medium Operation with lubricated medium possible (in which case lubricated operation will always be required)

Ambient temperature [°C] –10 … +70

Temperature of medium [°C] –10 … +70

Standard flow rate qn at 6 bar > 0 bar as a function of spindle rotations n

qn [l/min]

Materials

Sectional view

Flow control/silencer

1 Adjusting screw PA

2 Housing, threaded plug Die-cast aluminium

Note on materials RoHS-compliant (GRU-y/GRU-¾ only)

Subject to change – 2013/11

 Internet: www.festo.com/catalogue/...

Flow control/silencers GRU

Technical data

Dimensions Download CAD data  www.festo.com

1 Adjusting screw

Type Connection D1 L L1 ß

D ∅

GRU-x Gx 16 46 5.4 14

GRU-¼ G¼ 19.5 63.3 6.4 17

GRU-y Gy 25 95.3 7.5 19

GRU-½ G½ 28 130 14 24

GRU-¾ G¾ 38 157 16 32

Ordering data

Pneumatic con-

nection 1

Standard nominal flow rate qnN

at 6 bar > 5bar

in direction of flow control

Standard flow rate qn

at 6 bar > 0bar

in direction of flow control

Weight Part No. Type

[l/min] [l/min] [g]

Gx 1,000 0 … 1,000 10 9516 GRU-x-B

G¼ 1,500 0 … 1,500 25 9517 GRU-¼-B

Gy 1,700 0 … 1,700 55 9518 GRU-y-B

G½ 4,000 0 … 4,000 100 9519 GRU-½-B

G¾ 8,000 0 … 8,000 170 9520 GRU-¾-B