One-way flow control valves
Subject to change – 2014/06
2
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One-way flow control valves
Key features
Function
Flow control or one-way flow control
valves regulate the piston speed of
pneumatic drives during advance and
return strokes. This is done through
suitable restriction of the flow rate of
compressed air in exhaust air or
supply air direction. With the one-way
flow control valve GRLA or GRLZ, the
flow control function works in one dir
ection only (exhaust air or supply air);
the non-return function works in the
opposite direction. With the flow
control valve GRLO, the flow control
function is active in both directions.
The flow control function creates an
adjustable annular gap inside the
valve. This gap can be increased or de
creased by turning the knurled screw
or slotted head screw. The required
restriction can be set with the help of
this adjustment component.
-H- Note
The documentation for the flow
control valves can be found at
è www.festo.com/catalogue
General information
Standard nominal flow rate qnN Exhaust air one-way flow control
function
Flow measurement circuit
The standard nominal flow rate qnN is
the flow rate based on standard
conditions at an operating pressure of
p1 = 6 bar and an output pressure of
p2 = 5 bar, measured at room
temperature t = 20 °C.
Pressure gauge Pressure gauge
Flow meter
(flow measuring device)
Flow control valve
Test specimen
p
1
p
2
1 Supply port (pneumatic connection 1)
2 Working line (pneumatic connection 2)
1
2
p
1
Operating pressure
p
2
Output pressure
Standard flow rate qn
The standard flow rate is measured at
an operating pressure of p1 = 6 bar
and an output pressure with respect
to atmospheric pressure (p2 = 0 bar).
Supply air one-way flow control
function
Flow control function in both
directions
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One-way flow control valves
Key features
Flow control functions and range of applications
Application Description Application Description
Double-acting cylinder with one-way flow control valve
Exhaust air one-way flow control function Supply air one-way flow control function
Speed adjustment through exhaust air
flow control. Uncontrolled supply air
and controlled exhaust air move the
piston between air cushions (improves
motion, even with load changes).
Adjustable speed during advance and
return strokes. The flow rate is identical
in both directions.
Single-acting cylinder with one-way flow control valve Single-acting cylinder with flow control valve
Exhaust air and supply air one-way flow control function Flow control function in both directions
Adjustable speed during advance and
return strokes. The flow rate can be
adjusted differently for both directions.
Speed adjustment through flow control
on both sides is often applied in the
case of single-acting or small cylinders.
The benefit of this application lies in its
simplicity.
Application examples
Mini slide SLT with one-way flow
control valve, standard
Flat cylinder DZF with one-way flow
control valve, mini
Multimount cylinder DMM with
one-way flow control valve, mini
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One-way flow control valves
Product range overview
Version Valve function Version Type Connection
direction
Pneumatic
connection 1
Pneumatic
connection 2
qnN
1)
Adjustment
component
è Page/
Internet
[l/min]
Standard Metal
Exhaust air one-
way flow control
function
GRLA Elbow outlet QS-3, QS-4,
QS-6, QS-8,
QS-10, QS-12
M5, GÁ, G¼,
GÅ, G½
100 … 1,580 Slotted head
screw
8
Knurled screw
M5, GÁ, G¼,
Gy, G½, G¾
M5, GÁ, G¼,
Gy, G½, G¾
95 … 4,320 Slotted head
screw
12
M5, GÁ, G¼ M5, GÁ, G¼ 95 … 610 Knurled screw
PK-3, PK-4,
PK-6
M5, GÁ, G¼ 83 … 540 Slotted head
screw
12
GRLSA Elbow outlet QS-6, QS-8 GÁ, G¼ 0 … 450 Rotary knob
with scale,
internal hex
17
Supply air one-
way flow control
function
GRLZ Elbow outlet QS-3, QS-4,
QS-6, QS-8
M5, GÁ 100 … 215 Slotted head
screw
8
M5, GÁ, G¼ M5, GÁ, G¼ 95 … 610 Slotted head
screw
12
Knurled screw
PK-3, PK-4,
PK-6
M5, GÁ, G¼ 83 … 540 Slotted head
screw
12
VFOC-S Elbow outlet QS-4, QS-6 Push-in
sleeve
2)
QS-4,
QS-6
100 … 270 Slotted head
screw
20
Chromed metal
Exhaust air one-
way flow control
function
GRLA-F Elbow outlet QS-4, QS-6,
QS-8
GÁ, G¼ 180 … 530 Slotted head
screw
22
Polymer
Exhaust air one-
way flow control
function
GRLA Elbow outlet QS-6, QS-8 GÁ, G¼, GÅ 520 … 650 Knurled screw 24
Flat Polymer
Exhaust air one-
way flow control
function
VFOF Elbow outlet QS-6, QS-8 GÁ, G¼ 250 … 650 Internal hex vfof
1) Standard nominal flow rate in direction of flow control.
2) Only suitable for push-in connector QS.
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One-way flow control valves
Product range overview
Version Valve function Version Type Connection
direction
Pneumatic
connection 1
Pneumatic
connection 2
qnN
1)
Adjustment
component
è Page/
Internet
[l/min]
Mini Metal
Exhaust air one-
way flow control
function
GRLA Elbow outlet QS-3, QS-4 M3, M5 40 … 41 Slotted head
screw
26
M3 M3 0 … 18 Slotted head
screw
29
GRGA Parallel outlet QS-3 M3 0 … 41 Slotted head
screw
26
Supply air one-
way flow control
function
GRLZ Elbow outlet QS-3, QS-4 M3, M5 41 … 48 Slotted head
screw
26
M3 M3 0 … 18 Slotted head
screw
29
GRGZ Parallel outlet QS-3 M3 0 … 41 Slotted head
screw
26
In-line
installation
Metal
One-way flow
control function
GR/GRA Inline M3, M5, GÁ,
G¼, Gy,
G½, G¾
M3, M5, GÁ,
G¼, Gy,
G½, G¾
29.5 … 3,300 Knurled screw gr
Polymer
One-way flow
control function
GR Inline QS-3, QS-4,
QS-6, QS-8
QS-3, QS-4,
QS-6, QS-8
25 … 225 Knurled screw gr
Corrosion-
resistant
Stainless steel
Exhaust air one-
way flow control
function
CRGRLA Elbow outlet M5, GÁ, G¼,
Gy, G½
M5, GÁ, G¼,
Gy, G½
95 … 2,100 Slotted head
screw
31
Function
combination
Metal
Exhaust air one-
way flow control
function
GRXA Elbow outlet QS-4, QS-6,
QS-8
GÁ, G¼ 130 … 280 Slotted head
screw
34
Polymer
Exhaust air one-
way flow control
function
VFOF Elbow outlet QS-6, QS-8 GÁ, G¼ 240 … 590 Internal hex vfof
1) Standard nominal flow rate in direction of flow control.
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One-way flow control valves
Type codes
GRLA/GRLSA/GRLA-F/GRGA/CRGRLA/GRLZ/GRGZ
GRLA – x – QS – 6 – – – D
Type
Exhaust air one-way flow control function
GRLA One-way flow control valve, elbow outlet
GRLSA One-way flow control valve, elbow outlet with rotary knob
GRLA-F One-way flow control valve, elbow outlet, chromed metal
GRGA One-way flow control valve, parallel outlet
CRGRLA One-way flow control valve, elbow outlet, corrosion-resistant
GRXA-HG One-way flow control valve, function combination
Supply air one-way flow control function
GRLZ One-way flow control valve, elbow outlet
GRGZ One-way flow control valve, parallel outlet
Pneumatic connection 2
M3, M5, x,
¼, y, ½,
¾
Male thread
Pneumatic connection 1
Connection type
– Female thread (connection size as for connection 2)
QS Push-in connector QS
PK Barbed connector
Tubing O.D. or tubing I.D.
3, 4, 6, 8,
10, 12
Tubing O.D. with push-in connector QS
3, 4, 6 Tubing I.D. with barbed connector PK
Adjustment component
– Slotted head screw
RS Knurled screw
Flow rate characteristic
LF Low flow
MF Medium flow
Generation
B B series
C C series
D D series
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One-way flow control valves
Type codes
VOFC
VOFC – S – S6 – Q6
Type
VOFC One-way flow control valve, elbow outlet
Valve function
S Supply air one-way flow control function
Pneumatic connection 2
S4 Push-in sleeve QS-4
S6 Push-in sleeve QS-6
Pneumatic connection 1
Q4 Push-in connector QS-4
Q6 Push-in connector QS-6
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One-way flow control valves GRLA/GRLZ, standard
Technical data – Push-in connector QS, metal
One-way flow control function
Exhaust air Supply air
Can be swivelled 360° around the
screw-in axis after mounting
-M- Flow rate
100 … 1,580 l/min
-Q- Temperature range
–10 … +60 °C
-L- Operating pressure
0.2 … 10 bar
GRLA/GRLZ GRLA-…-RS
General technical data – GRLA
Valve function Exhaust air one-way flow control function
Pneumatic connection 2 M5 Gx G¼ Gy G½
Pneumatic connection 1 QS-3, QS-4, QS-6 QS-3, QS-4, QS-6,
QS-8
QS-6, QS-8, QS-10 QS-6, QS-8, QS-10 QS-12
Adjustment component Slotted head screw
Knurled screw
Type of mounting Screw-in, via male thread
Mounting position Any
Nominal tightening torque [Nm] 0.8 ±10% 3 ±10% 5 ±10% 10 ±10% 15 ±10%
General technical data – GRLZ
Valve function Supply air one-way flow control function
Pneumatic connection 2 M5 Gx
Pneumatic connection 1 QS-3, QS-4, QS-6 QS-3, QS-4, QS-6, QS-8
Adjustment component Slotted head screw
Type of mounting Screw-in, via male thread
Mounting position Any
Nominal tightening torque [Nm] 0.8 ±10% 3 ±10%
Operating and environmental conditions
Operating pressure complete
temperature range
[bar] 0.2 … 10
Operating medium Compressed air in accordance with ISO 85731:2010 [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] –10 … +60
Temperature of medium [°C] –10 … +60
Storage temperature [°C] –10 … +40
Certification Germanischer Lloyd
Standard nominal flow rate qnN at 6 > 5 bar
as a function of turns of the adjusting screw n
Standard flow rate qn at 6 > 0 bar
as a function of turns of the adjusting screw n
GRLA/GRLZ-M5 GRLA/GRLZ-M5
n
qnN [l/min]
qn [l/min]
n
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One-way flow control valves GRLA/GRLZ, standard
Technical data – Push-in connector QS, metal
Standard nominal flow rate qnN at 6 > 5 bar
as a function of turns of the adjusting screw n
Standard flow rate qn at 6 > 0 bar
as a function of turns of the adjusting screw n
GRLA/GRLZ-x GRLA/GRLZ-x
n
qnN [l/min]
qn [l/min]
n
GRLA-x-…-MF/GRLA-¼ GRLA-x-…-MF/GRLA-¼
n
qnN [l/min]
qn [l/min]
n
GRLA-y GRLA-y
n
qnN [l/min]
qn [l/min]
n
GRLA-½ GRLA-½
n
qnN [l/min]
qn [l/min]
n
Subject to change – 2014/06
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One-way flow control valves GRLA/GRLZ, standard
Technical data – Push-in connector QS, metal
Materials
Sectional view
One-way flow control valve
1 Knurled head (only
GRLA-…-RS)
Anodised wrought aluminium alloy
2 Adjusting screw Brass
3 Hollow bolt (only
GRLA-…-RS)
Anodised wrought aluminium alloy
4 Releasing ring POM
5 Swivel connection Die-cast zinc, chromed
6 Threaded plug Wrought aluminium alloy
GRLA/GRLZ-M5: Brass
– Seals NBR
Note on materials RoHS-compliant
Dimensions Download CAD data è www.festo.com
Slotted head screw Knurled screw
Type Connection Tubing O.D. B D2 D3 H H1 Lmax. L1 L2 ß
Slotted
head screw
Knurled
screw
D D1
GRL…-M5 M5 3
8.9 8.2 +0.15
8.9 ±0.07
22.4 18
21.4 31.3
3.7
+0.17/–0.25
11.65
84
9.9 10.0 ±0.2 24.7 20.3
6
12 12.0 ±0.2 26.5 22 10.65
GRL…-x Gx 3
13.8
10.2 ±0.2
13.8 ±0.07
31.9 25
26.9 40.4
5.1
+0.17/–0.25
14.4
124
10.2 ±0.2 29.4 22.5
6
12.5 ±0.2 32.6 25.7
13.7
8
14.5 ±0.2 35.6 28.7 12
GRLA-x-…-MF 6 12.5 ±0.2
17.8 ±0.15
36.6 27.7
31.5 – 17.2 15
8 14.5 ±0.2 39.6 30.7
GRLA-¼ G¼ 6
17.8
12.5 ±0.2
17.8 ±0.15
36.6
27.7
31.5 48.3
5.9
+0.17/–0.25
17.2
158
14.5 ±0.2 30.7
10
17.5 ±0.2 42.0 33.1 16.1
GRLA-y Gy 6
22.4
12.5 ±0.2
22.4 ±0.15
39.8 28.6
36.0 55.3
6.95
+0.15/–0.3
20.3
198
14.5 ±0.2 44.1 32.9
19.3
10
17.5 ±0.2 46.7 35.5
GRLA-½ G½ 12
27.8 20.5 ±0.15 27.8 ±0.15 55.3 41.4 42.3 65.7
8.15
+0.15/–0.3
23.0 24
2
6
1
3
4
5
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One-way flow control valves GRLA/GRLZ, standard
Technical data – Push-in connector QS, metal
Ordering data – Exhaust air one-way flow control function
Pneumatic
connection
Standard nominal flow rate qnN
at 6 > 5 bar
Standard flow rate qn
at 6 > 0 bar
Weight Part No. Type
in direction of
flow control
in non-return
direction
in direction of
flow control
in non-return
direction
2 1 [l/min] [l/min] [l/min] [l/min] [g]
Slotted head screw
M5 QS-3 100 60 … 100 145 150 … 170 13 193137 GRLA-M5-QS-3-D
QS-4 110 65 … 110 165 140 … 160 193138 GRLA-M5-QS-4-D
QS-6 115 70 … 110 185 145 … 170 193139 GRLA-M5-QS-6-D
Gx QS-3 130 100 … 130 180 200 … 220 22 193142 GRLA-x-QS-3-D
QS-4 160 120 … 190 250 270 … 300 193143 GRLA-x-QS-4-D
QS-6 185 160 … 240 370 330 … 390 193144 GRLA-x-QS-6-D
400 290 … 420 600 570 … 680 32 537075 GRLA-x-QS-6-MF-D
QS-8 215 175 … 250 400 330 … 410 22 193145 GRLA-x-QS-8-D
475 325 … 500 720 610 … 760 32 537076 GRLA-x-QS-8-MF-D
G¼ QS-6 400 290 … 420 600 570 … 680 42 193146 GRLA-¼-QS-6-D
QS-8 475 325 … 500 720 610 … 760 193147 GRLA-¼-QS-8-D
QS-10 480 345 … 500 760 630 … 790 193148 GRLA-¼-QS-10-D
Gy QS-6 495 320 … 495 740 840 … 890 60 193149 GRLA-y-QS-6-D
QS-8 820 450 … 850 1,300 1,080 … 1,420 193150 GRLA-y-QS-8-D
QS-10 900 540 … 975 1,400 1,160 … 1,620 193151 GRLA-y-QS-10-D
G½ QS-12 1,580 925 … 1,605 2,220 1,910 … 2,500 106 193152 GRLA-½-QS-12-D
Knurled screw
M5 QS-3 100 60 … 100 145 150 … 170 14 197576 GRLA-M5-QS-3-RS-D
QS-4 110 65 … 110 165 140 … 160 197577 GRLA-M5-QS-4-RS-D
QS-6 115 70 … 110 185 145 … 170 197578 GRLA-M5-QS-6-RS-D
Gx QS-3 130 100 … 130 180 200 … 220 23 197579 GRLA-x-QS-3-RS-D
QS-4 160 120 … 190 250 270 … 300 197580 GRLA-x-QS-4-RS-D
QS-6 185 160 … 240 370 330 … 390 197581 GRLA-x-QS-6-RS-D
QS-8 215 175 … 250 400 330 … 410 24 534337 GRLA-x-QS-8-RS-D
G¼ QS-6 400 290 … 420 600 570 … 680 50 534338 GRLA-¼-QS-6-RS-D
QS-8 475 325 … 500 720 610 … 760 534339 GRLA-¼-QS-8-RS-D
QS-10 480 345 … 500 760 630 … 790 534340 GRLA-¼-QS-10-RS-D
Gy QS-6 495 320 … 495 740 840 … 890 72 534341 GRLA-y-QS-6-RS-D
QS-8 820 450 … 850 1,300 1,080 … 1,420 534342 GRLA-y-QS-8-RS-D
QS-10 900 540 … 975 1,400 1,160 … 1,620 534343 GRLA-y-QS-10-RS-D
G½ QS-12 1,580 925 … 1,605 2,220 1,910 … 2,500 124 534344 GRLA-½-QS-12-RS-D
Ordering data – Supply air one-way flow control function
Pneumatic
connection
Standard nominal flow rate qnN
at 6 > 5 bar
Standard flow rate qn
at 6 > 0 bar
Weight Part No. Type
in direction of
flow control
in non-return
direction
in direction of
flow control
in non-return
direction
2 1 [l/min] [l/min] [l/min] [l/min] [g]
Slotted head screw
M5 QS-3 100 60 … 100 135 130 … 160 13 193153 GRLZ-M5-QS-3-D
QS-4 110 65 … 110 160 150 … 180 193154 GRLZ-M5-QS-4-D
QS-6 115 70 … 110 170 160 … 200 193155 GRLZ-M5-QS-6-D
Gx QS-3 130 100 … 130 200 180 … 200 22 193156 GRLZ-x-QS-3-D
QS-4 160 120 … 190 300 260 … 290 193157 GRLZ-x-QS-4-D
QS-6 185 160 … 240 340 390 … 460 193158 GRLZ-x-QS-6-D
QS-8 215 175 … 250 370 390 … 470 193159 GRLZ-x-QS-8-D
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One-way flow control valves GRLA/GRLZ, standard
Technical data – Female thread/barbed connector, metal
One-way flow control function
Exhaust air Supply air
-M- Flow rate
83 … 4,320 l/min
-Q- Temperature range
–10 … +60 °C
-L- Operating pressure
0.2 … 10 bar
GRLA/GRLZ GRLA/GRLZ-…-RS GRLA/GRLZ-…-PK
General technical data – GRLA
Valve function Exhaust air one-way flow control function
Connection type Female thread Barbed connector
Pneumatic connection 2 M5 Gx G¼ Gy G½ G¾ M5 Gx G¼
Pneumatic connection 1 M5
1)
Gx
1)
G¼
1)
Gy
1)
G½
1)
G¾
1)
PK-3, PK-4 PK-3, PK-4, PK-6 PK-4, PK-6
Adjustment component Slotted head screw
Knurled screw –
Type of mounting Screw-in
Mounting position Any
Max. tightening torque [Nm] 1.5 6 11 20 40 60 1.5 6 11
1) -H- Note: This product conforms to ISO 1179-1 and ISO 228-1.
General technical data – GRLZ
Valve function Supply air one-way flow control function
Connection type Female thread Barbed connector
Pneumatic connection 2 M5 Gx G¼ M5 Gx G¼
Pneumatic connection 1 M5
1)
Gx
1)
G¼
1)
PK-3, PK-4 PK-3, PK-4, PK-6 PK-4, PK-6
Adjustment component Slotted head screw
Knurled screw –
Type of mounting Screw-in
Mounting position Any
Max. tightening torque [Nm] 1.5 6 11 1.5 6 11
1) -H- Note: This product conforms to ISO 1179-1 and ISO 228-1.
Operating and environmental conditions
Pneumatic connection 2 M5 Gx G¼ Gy G½ G¾
Operating pressure [bar] 0.2 … 10 0.3 … 10
Operating medium Compressed air in accordance with ISO 85731:2010 [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] –10 … +60
Temperature of medium [°C] –10 … +60
Storage temperature [°C] –10 … +40
Certification GRLA: Germanischer Lloyd
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One-way flow control valves GRLA/GRLZ, standard
Technical data – Female thread/barbed connector, metal
Standard nominal flow rate qnN at 6 > 5 bar
as a function of turns of the adjusting screw n
Standard flow rate qn at 6 > 0 bar
as a function of turns of the adjusting screw n
GRLA/GRLZ-M5 GRLA/GRLZ-M5
n
qnN [l/min]
n
qn [l/min]
GRLA/GRLZ-x GRLA/GRLZ-x
qnN [l/min]
n
n
qn [l/min]
GRLA/GRLZ-¼ GRLA/GRLZ-¼
n
qnN [l/min]
n
qn [l/min]
Subject to change – 2014/06
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One-way flow control valves GRLA/GRLZ, standard
Technical data – Female thread/barbed connector, metal
Standard nominal flow rate qnN at 6 > 5 bar
as a function of turns of the adjusting screw n
Standard flow rate qn at 6 > 0 bar
as a function of turns of the adjusting screw n
GRLA-y GRLA-y
qnN [l/min]
n
qn [l/min]
n
GRLA-½ GRLA-½
n
qnN [l/min]
qn [l/min]
n
GRLA-¾ GRLA-¾
n
qnN [l/min]
n
qn [l/min]
Materials
Sectional view
One-way flow control valve
1 Adjusting screw Brass
2 Swivel connection Die-cast zinc
3 Threaded plug Wrought aluminium alloy
GRLA/GRLZ-M5: Nickel-plated brass
– Seals NBR
Note on materials RoHS-compliant
2
1
3
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One-way flow control valves GRLA/GRLZ, standard
Technical data – Female thread/barbed connector, metal
Dimensions – Female thread connection type Download CAD data è www.festo.com
Slotted head screw Knurled screw
Type Connection Nominal size B H H1 Lmax. L1 L2 ß
D
[mm]
Slotted
head screw
Knurled
screw
GRL…-M5 M5 2 10 –0.15 17.5 12.5 17.6 27.3 4.0 ±0.3 7.1 9
GRL…-x Gx 4 16 –0.15 28 20 25.2 38.6 5.3 +0.45/–0.35 10.3 14
GRL…-¼ G¼ 6 20 –0.2 36 26 30.8 54.8 8.2 +0.45/–0.35 13.2 17
GRLA-y Gy 8.5 25 –0.2 41 28.5 37.2 – 8.8 +0.45/–0.35 15.5 22
GRLA-½ G½ 10.6 32 –0.2 53 37 48.6 – 12.8 ±0.45 18.9 27
GRLA-¾ G¾ 14 41 –0.3 64 43.5 60.2 – 13.5 ±0.5 24.5 36
-H- Note: This product conforms to ISO 1179-1 and to ISO 228-1
Dimensions – Barbed connector connection type Download CAD data è www.festo.com
Slotted head screw
GRL…-M5 GRL…-x/GRL…-¼
3 Barbed connector 4 Union nut
Type Connection Nominal size B H H1 L
max.
L1 L2 ß
D [mm]
GRL…-M5-PK-3 M5 2
10 –0.15 19.7 14.7 17.6 4.0 ±0.3 8.5 9
GRL…-M5-PK-4
10 –0.15 21.7 16.7 17.6 4.0 ±0.3 8.5 9
GRL…-x-PK-3 Gx 4
16 –0.15 27.1 19.1 25.2 5.3 +0.45/–0.35 13.4 14
GRL…-x-PK-4
16 –0.15 30.2 22.2 25.2 5.3 +0.45/–0.35 13.4 14
GRL…-x-PK-6
16 –0.15 30.3 22.3 25.2 5.3 +0.45/–0.35 12.0 14
GRL…-¼-PK-4 G¼ 6
20 –0.2 34.2 24.2 30.8 8.2 +0.45/–0.35 16.9 17
GRL…-¼-PK-6
20 –0.2 34.3 24.3 30.8 8.2 +0.45/–0.35 17.2 17
Subject to change – 2014/06
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One-way flow control valves GRLA/GRLZ, standard
Technical data – Female thread/barbed connector, metal
Ordering data – Exhaust air one-way flow control function
Pneumatic
connection
Standard nominal flow rate qnN
at 6 > 5 bar
Standard flow rate qn
at 6 > 0 bar
Weight Part No. Type
in direction of flow
control
in non-return
direction
in direction of flow
control
in non-return
direction
2 1 [l/min] [l/min] [l/min] [l/min] [g]
Slotted head screw
M5 M5 95 76 … 95 169 135 … 170 11 151160 GRLA-M5-B
Gx Gx 340 260 … 420 615 470 … 760 28 151165 GRLA-x-B
G¼ G¼ 610 450 … 820 1,200 885 … 1,615 59 151172 GRLA-¼-B
Gy Gy 1,450 970 … 1,600 2,300 1,540 … 2,540 97 151178 GRLA-y-B
G½ G½ 2,100 1,550 … 2,200 4,000 2,950 … 4,190 204 151179 GRLA-½-B
G¾ G¾ 4,320 3,220 … 4,720 7,300 5,440 … 7,300 377 151180 GRLA-¾-B
M5 PK-3 83 72 … 83 140 120 … 140 10 151161 GRLA-M5-PK-3-B
PK-4 83 76 … 88 140 128 … 148 10 151162 GRLA-M5-PK-4-B
Gx PK-3
1)
110 100 … 110 162 145 … 165 22 151166 GRLA-x-PK-3-B
PK-4
1)
230 190 … 240 360 295 … 375 25 151167 GRLA-x-PK-4-B
PK-6
1)
300 210 … 290 455 320 … 440 26 151168 GRLA-x-PK-6-B
G¼ PK-4
1)
260 220 … 260 370 315 … 370 44 151173 GRLA-¼-PK-4-B
PK-6
1)
540 410 … 585 840 635 … 910 45 151174 GRLA-¼-PK-6-B
Knurled screw
M5 M5 95 76 … 95 169 135 … 170 12 151163 GRLA-M5-RS-B
Gx Gx 340 260 … 420 615 470 … 760 30 151169 GRLA-x-RS-B
G¼ G¼ 610 450 … 820 1,200 885 … 1,615 59 151175 GRLA-¼-RS-B
1) Via union nut
Ordering data – Supply air one-way flow control function
Pneumatic
connection
Standard nominal flow rate qnN
at 6 > 5 bar
Standard flow rate qn
at 6 > 0 bar
Weight Part No. Type
in direction of
flow control
in non-return
direction
in direction of
flow control
in non-return
direction
2 1 [l/min] [l/min] [l/min] [l/min] [g]
Slotted head screw
M5 M5 95 76 … 95 169 135 … 170 11 151183 GRLZ-M5-B
Gx Gx 340 260 … 420 615 470 … 760 28 151188 GRLZ-x-B
G¼ G¼ 610 450 … 820 1,200 885 … 1,615 59 151195 GRLZ-¼-B
M5 PK-3 83 72 … 83 140 120 … 140 10 151184 GRLZ-M5-PK-3-B
PK-4 83 76 … 88 140 125 … 150 10 151185 GRLZ-M5-PK-4-B
Gx PK-3
1)
110 100 … 110 162 145 … 165 22 151189 GRLZ-x-PK-3-B
PK-4
1)
230 190 … 240 360 295 … 375 25 151190 GRLZ-x-PK-4-B
PK-6
1)
300 210 … 290 455 320 … 440 26 151191 GRLZ-x-PK-6-B
G¼ PK-4
1)
260 220 … 260 370 315 … 370 44 151196 GRLZ-¼-PK-4-B
PK-6
1)
540 410 … 585 840 635 … 910 45 151197 GRLZ-¼-PK-6-B
Knurled screw
M5 M5 95 76 … 95 169 135 … 170 12 151186 GRLZ-M5-RS-B
Gx Gx 340 260 … 420 615 470 … 760 30 151192 GRLZ-x-RS-B
G¼ G¼ 610 450 … 820 1,200 885 … 1,615 59 151198 GRLZ-¼-RS-B
1) Via union nut
2014/06 – Subject to change
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One-way flow control valves GRLSA, standard
Technical data – Push-in connector QS, metal
One-way flow control function
Exhaust air
-M- Flow rate
0 … 450 l/min
-Q- Temperature range
–10 … +60 °C
-L- Operating pressure
0.2 … 10 bar
This one-way flow control valve offers
the ideal conditions for optimum and
easy setting of the flow rate in
a unique design.
There are two setting options: 1 Gradual for preselection of the
flow range in 5 stages via rotary
switch: A, B, C, D, E
2 Infinitely variable for precision
adjustment using internal hex
via a scale marked from 0 to 10
General technical data
Valve function Exhaust air one-way flow control function
Pneumatic connection 2 Gx G¼
Pneumatic connection 1 QS-6 QS-8
Adjustment component Rotary knob with scale and internal hex
Actuation type Manual
Type of mounting Screw-in
Mounting position Any
Nominal tightening torque [Nm] 3.5 ±20% 11 ±10%
Operating and environmental conditions
Operating pressure complete
temperature range
[bar] 0.2 … 10
Operating medium Compressed air in accordance with ISO 85731:2010 [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] –10 … +60
Temperature of medium [°C] –10 … +60
Storage temperature [°C] –10 … +40
-V- New
GRLSA-¼-QS-8
Subject to change – 2014/06
18
è Internet: www.festo.com/catalogue/...
One-way flow control valves GRLSA, standard
Technical data – Push-in connector QS, metal
Standard nominal flow rate qnN at 6 > 5 bar
as a function of the position of the flow control screw (scale) n
Standard flow rate qn at 6 > 0 bar
as a function of the position of the flow control screw (scale) n
GRLSA-x GRLSA-x
GRLSA-¼ GRLSA-¼
Stage: A
Stage: B
Stage: C
Stage: D
Stage: E
Flow rate value tolerance: _20%
Materials
Sectional view
One-way flow control valve
1 Adjusting screw PA, reinforced
2 Swivel connection Die-cast zinc
3 Releasing ring POM
4 Hollow bolt Anodised wrought aluminium alloy
– Seals NBR
Note on materials RoHS-compliant
Free of copper and PTFE
-V- New
GRLSA-¼-QS-8
1
3
4
2
2014/06 – Subject to change
19
è Internet: www.festo.com/catalogue/...
One-way flow control valves GRLSA, standard
Technical data – Push-in connector QS, metal
Dimensions Download CAD data è www.festo.com
Rotary knob with scale and internal hex
Type Connection Tubing O.D. B B1 B2 H L L1 L2 L3 ß1 ß2
max.
D D1
GRLSA-x Gx 6 12.5 13.8 15 25.7 36.6 5.1 13.5 2 12 3
GRLSA-¼ G¼ 8 14.5 17.8 18.8 30.75 46.5 7 17.2 3 15 3
Ordering data – Exhaust air one-way flow control function
Pneumatic
connection
Standard nominal flow rate qnN
at 6 > 5 bar
Standard flow rate qn
at 6 > 0 bar
Weight Part No. Type
in direction of
flow control
in non-return
direction
in direction of
flow control
in non-return
direction
2 1 [l/min] [l/min] [l/min] [l/min] [g]
Rotary knob with scale and internal hex
Gx QS-6 0 … 250 180 … 310 0 … 410 430 … 540 19.5 540661 GRLSA-x-QS-6
G¼ QS-8 0 … 450 390 … 570 0 … 700 820 … 930 34.8 540662 GRLSA-¼-QS-8 -V-
-V- New
GRLSA-¼-QS-8
Subject to change – 2014/06
20
è Internet: www.festo.com/catalogue/...
One-way flow control valves VFOC, standard
Technical data – Push-in connector QS, metal
One-way flow control function
Supply air
-M- Flow rate
0 … 270 l/min
-Q- Temperature range
–10 … +60 °C
-L- Operating pressure
0.2 … 10 bar
General technical data
Valve function Supply air one-way flow control function
Pneumatic connection 2 Push-in sleeve QS-4 Push-in sleeve QS-6
Pneumatic connection 1 QS-4 QS-6
Note on the pneumatic connection 2 Only suitable for push-in connector QS from Festo
Adjustment component Slotted head screw
Actuation type Manual
Type of mounting Plug-in, with push-in sleeve
Mounting position Any
Operating and environmental conditions
Operating pressure [bar] 0.2 … 10
Operating medium Compressed air in accordance with ISO 85731:2010 [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] –10 … +60
Temperature of medium [°C] –10 … +60
Storage temperature [°C] –10 … +40
Standard nominal flow rate qnN at 6 > 5 bar
as a function of turns of the adjusting screw n
Standard flow rate qn at 6 > 0 bar
as a function of turns of the adjusting screw n
QS-6
QS-4
QS-6
QS-4
2014/06 – Subject to change
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One-way flow control valves VFOC, standard
Technical data – Push-in connector QS, metal
Materials
Sectional view
One-way flow control valve
1 Adjusting screw High-alloy stainless steel
2 Swivel connection Die-cast zinc
3 Releasing ring POM
4 Hollow bolt Black anodised wrought aluminium
alloy
– Seals NBR
Note on materials RoHS-compliant
Dimensions Download CAD data è www.festo.com
Slotted head screw
-H- Note
The push-in sleeves of the one-way
flow control valves VFOC are
exclusively matched to push-in
fittings QS from Festo
è www.festo.com/catalogue.
This combination alone guarantees
a secure grip in the push-in fitting.
Type Push-in
sleeve
Tubing O.D. D2 D3 H H1 L L1 L2
D D1
VFOC-S-S4-Q4 4 4 10 8.9 24.7 20.3 23.2 14.8 13.2
VFOC-S-S6-Q6 6 6 12.5 13.8 32.6 25.7 28 16.5 15.8
Ordering data – Supply air one-way flow control function
Pneumatic
connection
Standard nominal flow rate qnN
at 6 > 5 bar
Standard flow rate qn
at 6 > 0 bar
Weight Part No. Type
in direction of
flow control
in non-return
direction
in direction of
flow control
in non-return
direction
2 1 [l/min] [l/min] [l/min] [l/min] [g]
Slotted head screw
Push-in
sleeve
QS-4
QS-4 0 … 100 60 … 100 0 … 170 130 … 160 9.2 559723 VFOC-S-S4-Q4
Push-in
sleeve
QS-6
QS-6 0 … 270 170 … 260 0 … 430 330 … 400 21.6 559724 VFOC-S-S6-Q6
1
2
4
3
Subject to change – 2014/06
22
è Internet: www.festo.com/catalogue/...
One-way flow control valves GRLA-F, standard
Technical data – Push-in connector QS, chromed metal
One-way flow control function
Exhaust air
Can be swivelled 360° around the
screw-in axis after mounting
-M- Flow rate
100 … 530 l/min
-Q- Temperature range
0 … +150 °C
-L- Operating pressure
0.2 … 10 bar
General technical data
Valve function Exhaust air one-way flow control function
Pneumatic connection 2 Gx G¼
Pneumatic connection 1 QS-4, QS-6, QS-8 QS-6, QS-8
Adjustment component Slotted head screw
Actuation type Manual
Type of mounting Screw-in
Mounting position Any
Max. tightening torque [Nm] 5.5 11
Operating and environmental conditions
Operating pressure [bar] 0.2 … 10
Operating medium Compressed air in accordance with ISO 85731:2010 [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] 0 … +150
Temperature of medium [°C] 0 … +150
Storage temperature [°C] –10 … +150
Corrosion resistance class CRC
1)
3
1) Corrosion resistance class 3 according to Festo standard 940 070
Components subject to high corrosion stress. External visible parts in direct contact with industrial atmospheres or media such as solvents and cleaning agents, with a predominantly functional requirement for the
surface.
Standard nominal flow rate qnN at 6 } 5 bar as a function of turns of the adjusting screw n
GRLA-F-x GRLA-F-¼
2014/06 – Subject to change
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One-way flow control valves GRLA-F, standard
Technical data – Push-in connector QS, chromed metal
Materials
Sectional view
One-way flow control valve
1 Adjusting screw High-alloy stainless steel
2 Swivel connection Nickel and chrome-plated brass
3 Releasing ring Nickel and chrome-plated brass
4 Hollow bolt Wrought aluminium alloy
– Seals FPM
Note on materials RoHS-compliant
Free of copper and PTFE
Dimensions Download CAD data è www.festo.com
Slotted head screw
Type Connection Tubing O.D. B D2 H H1 L L1 ß
max.
D D1
GRLA-F-x Gx 4
13.8
9 28.0 21.1
31.6 5.2 126
11 31.0 24.1
8
13 31.9 25.0
GRLA-F-¼ G¼ 6
17.8
11 35.1 26.2
34.9 5.9 15
8
13 35.9 27.0
Ordering data – Exhaust air one-way flow control function
Pneumatic
connection
Standard nominal flow rate qnN
at 6 > 5 bar
Standard flow rate qn
at 6 > 0 bar
Weight Part No. Type
in direction of
flow control
in non-return
direction
in direction of
flow control
in non-return
direction
2 1 [l/min] [l/min] [l/min] [l/min] [g]
Slotted head screw
Gx QS-4 180 103 … 188 250 270 … 300 25 195597 GRLA-F-x-QS-4-D
QS-6 255 111 … 280 370 330 … 390 195598 GRLA-F-x-QS-6-D
QS-8 275 132 … 307 400 330 … 410 195599 GRLA-F-x-QS-8-D
G¼ QS-6 430 384 … 478 600 570 … 680 37 195600 GRLA-F-¼-QS-6-D
QS-8 530 402 … 578 720 610 … 760 195601 GRLA-F-¼-QS-8-D
1
3
4
2
Subject to change – 2014/06
24
è Internet: www.festo.com/catalogue/...
One-way flow control valves GRLA, standard
Technical data – Push-in connector QS, polymer
One-way flow control function
Exhaust air
Can be swivelled 360° around the
screw-in axis after mounting
-M- Flow rate
520 … 650 l/min
-Q- Temperature range
–10 … +60 °C
-L- Operating pressure
0.2 … 10 bar
General technical data
Valve function Exhaust air one-way flow control function
Pneumatic connection 2 Gx G¼ Gy
Pneumatic connection 1 QS-6, QS-8 QS-6, QS-8 QS-6, QS-8
Adjustment component Knurled screw
Actuation type Manual
Type of mounting Screw-in
Mounting position Any
Nominal tightening torque [Nm] 3.5 ±20% 11 ±10% 12.5 ±20%
Perm. actuation torque for
regulating screw
[Nm] 0.4
Operating and environmental conditions
Operating pressure complete
temperature range
[bar] 0.2 … 10
Operating medium Compressed air in accordance with ISO 85731:2010 [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] –10 … +60
Temperature of medium [°C] –10 … +60
Storage temperature [°C] –10 … +40
Corrosion resistance class CRC
1)
2
1) Corrosion resistance class 2 according to Festo standard 940 070
Components subject to moderate corrosion stress. Externally visible parts with primarily decorative surface requirements which are in direct contact with a normal industrial environment or media such as coolants or
lubricating agents.
Standard nominal flow rate qnN at 6 > 5 bar
as a function of turns of the adjusting screw n
Standard flow rate qn at 6 > 0 bar
as a function of turns of the adjusting screw n
qnN [l/min]
n
n
qn [l/min]
2014/06 – Subject to change
25
è Internet: www.festo.com/catalogue/...
One-way flow control valves GRLA, standard
Technical data – Push-in connector QS, polymer
Materials
Sectional view
One-way flow control valve
1 Knurled head Wrought aluminium alloy
2 Regulating screw Brass
3 Swivel connection PBT, reinforced
4 Releasing ring POM
5 Threaded plug Wrought aluminium alloy
– Seals TPE-U(PU)
NBR
Note on materials RoHS-compliant
Dimensions Download CAD data è www.festo.com
Knurled screw
Type Connection Tubing O.D. D2 D3 H1 L L1 L2 ß
max.
D D1
GRLA-x Gx 6
13.0 ±0.25
17.9 –0.1
27.2
48 4.9 22.6 13
8
16.8 ±0.4 35.4
GRLA-¼ G¼ 6
13.0 ±0.25
17.9 –0.1
27.2
48 5.8 22.3 17
8
16.8 ±0.4 35.4
GRLA-y Gy 6
13.0 ±0.25
17.9 –0.1
27.2
48 6.8 22.3 19
8
16.8 ±0.4 35.4
Ordering data – Exhaust air one-way flow control function
Pneumatic connec
tion
Standard nominal flow rate qnN
at 6 > 5 bar
Standard flow rate qn
at 6 > 0 bar
Weight Part No. Type
in direction of
flow control
in non-return
direction
in direction of
flow control
in non-return
direction
2 1 [l/min] [l/min] [l/min] [l/min] [g]
Knurled screw
Gx QS-6 520 400 … 550 720 600 … 750 25 162965 GRLA-x-QS-6-RS-B
QS-8 650 600 … 750 1,080 800 … 1,250 162966 GRLA-x-QS-8-RS-B
G¼ QS-6 520 400 … 550 720 600 … 750 30 162967 GRLA-¼-QS-6-RS-B
QS-8 650 600 … 750 1,130 800 … 1,250 162968 GRLA-¼-QS-8-RS-B
Gy QS-6 530 400 … 550 720 600 … 750 40 162969 GRLA-y-QS-6-RS-B
QS-8 650 600 … 750 1,130 900 … 1,250 162970 GRLA-y-QS-8-RS-B
1
3
5
4
2
Subject to change – 2014/06
26
è Internet: www.festo.com/catalogue/...
One-way flow control valves GRLA/GRLZ/GRGA/GRGZ, mini
Technical data – Push-in connector QS, metal
One-way flow control function
Exhaust air Supply air
Low flow: precision adjustment for
low speed
-M- Flow rate
40 … 48 l/min
-Q- Temperature range
–10 … +60 °C
-L- Operating pressure
0.2 … 10 bar
GRLA/GRLZ GRGA/GRGZ
General technical data – GRLA/GRGA
Valve function Exhaust air one-way flow control function
Pneumatic connection 2 M3 M5
Pneumatic connection 1 QS-3 QS-3, QS-4
Adjustment component Slotted head screw
Type of mounting Screw-in
Mounting position Any
Max. tightening torque [Nm] 0.3 1.5
General technical data – GRLZ/GRGZ
Valve function Supply air one-way flow control function
Pneumatic connection 2 M3 M5
Pneumatic connection 1 QS-3 QS-3, QS-4
Adjustment component Slotted head screw
Type of mounting Screw-in
Mounting position Any
Max. tightening torque [Nm] 0.3 1.5
Operating and environmental conditions
Operating pressure [bar] 0.2 … 10
Operating medium Compressed air in accordance with ISO 85731:2010 [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] –10 … +60
Temperature of medium [°C] –10 … +60
Storage temperature [°C] –10 … +40
Certification GRLA: Germanischer Lloyd
2014/06 – Subject to change
27
è Internet: www.festo.com/catalogue/...
One-way flow control valves GRLA/GRLZ/GRGA/GRGZ, mini
Technical data – Push-in connector QS, metal
Standard nominal flow rate qnN at 6 > 5 bar
as a function of turns of the adjusting screw n
Standard flow rate qn at 6 > 0 bar
as a function of turns of the adjusting screw n
GRLA/GRLZ/GRGA/GRGZ-M3 GRLA/GRLZ/GRGA/GRGZ-M3
n
qnN [l/min]
qn [l/min]
n
GRLA/GRLZ-M5 GRLA/GRLZ-M5
n
qnN [l/min]
Materials
Sectional view
One-way flow control valve
1 Adjusting screw Brass
2 Swivel connection Die-cast zinc
3 Releasing ring POM
4 Threaded plug Nickel-plated brass
– Seals NBR
Note on materials RoHS-compliant
2
4
1
3
Subject to change – 2014/06
28
è Internet: www.festo.com/catalogue/...
One-way flow control valves GRLA/GRLZ/GRGA/GRGZ, mini
Technical data – Push-in connector QS, metal
Dimensions Download CAD data è www.festo.com
GRLA/GRLZ, elbow outlet GRGA/GRGZ, parallel outlet
Type Connection Nominal size Tubing O.D. B H H1 H2 L
max.
L1 L2 L3 ß
D [mm] D1
GRLA/GRLZ M3 1.4 3
8 –0.15 20 15.8
–
16.6 2.3 +0.15/–0.3 7
– 7M5 1.4 3
9.8 –0.15 22.4 18.4 17.7 3.1 +0.15/–0.35 7.3
1.4 4
9.8 –0.15 22.2 18.2 17.7 3.1 +0.15/–0.35 7.3
GRGA/GRGZ M3 1.4 3 8 –0.15 18 14 9.25 16.6 2.3 +0.15/–0.3 7.5 22 7
Ordering data – Exhaust air one-way flow control function
Pneumatic
connection
Standard nominal flow rate qnN
at 6 > 5 bar
Standard flow rate qn
at 6 > 0 bar
Weight Part No. Type
in direction of
flow control
in non-return
direction
in direction of
flow control
in non-return
direction
2 1 [l/min] [l/min] [l/min] [l/min] [g]
Slotted head screw
M3 QS-3 41 27 … 50 95 75 … 110 7 175041 GRLA-M3-QS-3
M5 QS-3 40 46 … 70 80 90 … 140 9 175053 GRLA-M5-QS-3-LF-C
QS-4 40 50 … 75 80 100 … 150 9 175056 GRLA-M5-QS-4-LF-C
M3 QS-3 41 27 … 50 95 75 … 110 14 175044 GRGA-M3-QS-3
Ordering data – Supply air one-way flow control function
Pneumatic
connection
Standard nominal flow rate qnN
at 6 > 5 bar
Standard flow rate qn
at 6 > 0 bar
Weight Part No. Type
in direction of
flow control
in non-return
direction
in direction of
flow control
in non-return
direction
2 1 [l/min] [l/min] [l/min] [l/min] [g]
Slotted head screw
M3 QS-3 41 27 … 44 95 75 … 100 7 175043 GRLZ-M3-QS-3
M5 QS-3 48 36 … 52 80 60 … 90 9 175055 GRLZ-M5-QS-3-LF-C
QS-4 48 40 … 65 80 65 … 110 9 175058 GRLZ-M5-QS-4-LF-C
M3 QS-3 41 27 … 44 95 75 … 100 14 175046 GRGZ-M3-QS-3
2014/06 – Subject to change
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One-way flow control valves GRLA/GRLZ, mini
Technical data – Female thread, metal
One-way flow control function
Exhaust air Supply air
-M- Flow rate
0 … 18 l/min
-Q- Temperature range
–10 … +60 °C
-L- Operating pressure
0.2 … 10 bar
General technical data – GRLA
Valve function Exhaust air one-way flow control function
Pneumatic connection 2 M3
Pneumatic connection 1 M3
Adjustment component Slotted head screw
Type of mounting Screw-in
Mounting position Any
Max. tightening torque [Nm] 0.3
General technical data – GRLZ
Valve function Supply air one-way flow control function
Pneumatic connection 2 M3
Pneumatic connection 1 M3
Adjustment component Slotted head screw
Type of mounting Screw-in
Mounting position Any
Max. tightening torque [Nm] 0.3
Operating and environmental conditions
Operating pressure [bar] 0.2 … 10
Operating medium Compressed air in accordance with ISO 85731:2010 [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] –10 … +60
Temperature of medium [°C] –10 … +60
Storage temperature [°C] –10 … +40
Certification GRLA: Germanischer Lloyd
Standard nominal flow rate qnN at 6 > 5 bar
as a function of turns of the adjusting screw n
Standard flow rate qn at 6 > 0 bar
as a function of turns of the adjusting screw n
n
qnN [l/min]
Subject to change – 2014/06
30
è Internet: www.festo.com/catalogue/...
One-way flow control valves GRLA/GRLZ, mini
Technical data – Female thread, metal
Materials
Sectional view
One-way flow control valve
1 Adjusting screw Brass
2 Swivel connection Die-cast zinc
3 Threaded plug Nickel-plated brass
– Seals NBR
Note on materials RoHS-compliant
Dimensions Download CAD data è www.festo.com
Slotted head screw
Type Connection Nominal size B H H1 L
max.
L1 L2 ß
D [mm]
GRLA/GRLZ M3 0.8 5 –0.1 9 6.5 13.3 2.5 +0.15/–0.3 6.4 4.5
Ordering data – Exhaust air one-way flow control function
Pneumatic
connection
Standard nominal flow rate qnN
at 6 > 5 bar
Standard flow rate qn
at 6 > 0 bar
Weight Part No. Type
in direction of
flow control
in non-return
direction
in direction of
flow control
in non-return
direction
2 1 [l/min] [l/min] [l/min] [l/min] [g]
Slotted head screw
M3 M3 18 18 … 20 33 33 … 37 2 175038 GRLA-M3
Ordering data – Supply air one-way flow control function
Pneumatic
connection
Standard nominal flow rate qnN
at 6 > 5 bar
Standard flow rate qn
at 6 > 0 bar
Weight Part No. Type
in direction of
flow control
in non-return
direction
in direction of
flow control
in non-return
direction
2 1 [l/min] [l/min] [l/min] [l/min] [g]
Slotted head screw
M3 M3 18 18 … 20 33 33 … 37 2 175040 GRLZ-M3
2
1
3
2014/06 – Subject to change
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One-way flow control valves CRGRLA, corrosion-resistant
Technical data – Female thread, stainless steel
One-way flow control function
Exhaust air
-M- Flow rate
95 … 2,100 l/min
-Q- Temperature range
–20 … +80 °C
-L- Operating pressure
0.2 … 10 bar
General technical data
Valve function Exhaust air one-way flow control function
Pneumatic connection 2 M5 Gx G¼ Gy G½
Pneumatic connection 1 M5 Gx G¼ Gy G½
Adjustment component Slotted head screw
Type of mounting Screw-in
Mounting position Any
Max. tightening torque [Nm] 1.5 6 11 20 40
Perm. actuation torque for
regulating screw
[Nm] 0.2 0.5 1.5 2 3
-H- Note: This product conforms to ISO 1179-1 and to ISO 228-1
Operating and environmental conditions
Pneumatic connection 2 M5 Gx G¼ Gy G½
Operating pressure [bar] 0.2 … 10 0.3 … 10
Operating medium Compressed air in accordance with ISO 85731:2010 [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
Temperature of medium [°C] –10 … +60
Storage temperature [°C] –10 … +40
Corrosion resistance class CRC
1)
3
Certification Germanischer Lloyd
1) Corrosion resistance class 3 according to Festo standard 940 070
Components subject to high corrosion stress. External visible parts in direct contact with industrial atmospheres or media such as solvents and cleaning agents, with a predominantly functional requirement for the
surface.
Standard nominal flow rate qnN at 6 > 5 bar
as a function of turns of the adjusting screw n
Standard flow rate qn at 6 > 0 bar
as a function of turns of the adjusting screw n
CRGRLA-M5, CRGRLA-x CRGRLA-M5, CRGRLA-x
n
qnN [l/min]
n
qn [l/min]
Subject to change – 2014/06
32
è Internet: www.festo.com/catalogue/...
One-way flow control valves CRGRLA, corrosion-resistant
Technical data – Female thread, stainless steel
Standard nominal flow rate qnN at 6 > 5 bar
as a function of turns of the adjusting screw n
Standard flow rate qn at 6 > 0 bar
as a function of turns of the adjusting screw n
CRGRLA-¼, CRGRLA-y, CRGRLA-½ CRGRLA-¼, CRGRLA-y, CRGRLA-½
qnN [l/min]
n
n
qn [l/min]
Materials
Sectional view
One-way flow control valve
1 Regulating screw High-alloy stainless steel
2 Swivel connection High-alloy stainless steel
3 Hollow bolt High-alloy steel
– Seals FPM, PVC
Note on materials RoHS-compliant
Dimensions Download CAD data è www.festo.com
CRGRLA-M5 CRGRLA-x, CRGRLA-¼, CRGRLA-y, CRGRLA-½
Type Connection Nominal size B H H1 L L1 L2 L3 ß
D [mm]
CRGRLA-M5 M5 2 10 –0.25 17.5 ±0.3 12.5 23.2 4 7.1 2.5 9
CRGRLA-x Gx 4 16 –0.4 28 +0.4/–0.3 20 33.7 5.5 10.3 3.5 14
CRGRLA-¼ G¼ 6 20 –0.3 36 +0.4/–0.2 26 38.8 6.5 13.2 3.5 17
CRGRLA-y Gy 8.5 25 –0.3 41 +0.4/–0.2 28.5 48.5 7.5 15.4 5 22
CRGRLA-½ G½ 10.6 32 –0.4 53 ±0.5 37 62.2 9 18.9 7.5 27
-H- Note: This product conforms to ISO 1179-1 and to ISO 228-1
2
1
3
2014/06 – Subject to change
33
è Internet: www.festo.com/catalogue/...
One-way flow control valves CRGRLA, corrosion-resistant
Technical data – Female thread, stainless steel
Ordering data – Exhaust air one-way flow control function
Pneumatic
connection
Standard nominal flow rate qnN
at 6 > 5 bar
Standard flow rate qn
at 6 > 0 bar
Weight Part No. Type
in direction of
flow control
in non-return
direction
in direction of
flow control
in non-return
direction
2 1 [l/min] [l/min] [l/min] [l/min] [g]
Slotted head screw
M5 M5 95 77 … 95 165 140 … 150 10.2 161403 CRGRLA-M5-B
Gx Gx 340 260 … 420 580 530 … 590 37.8 161404 CRGRLA-x-B
G¼ G¼ 610 450 … 820 1,265 1,030 … 1,345 71.6 161405 CRGRLA-¼-B
Gy Gy 1,450 970 … 1,600 2,515 2,095 … 2,665 126.9 161406 CRGRLA-y-B
G½ G½ 2,100 1,550 … 2,200 4,265 3,550 … 4,325 262.3 161407 CRGRLA-½-B
Subject to change – 2014/06
34
è Internet: www.festo.com/catalogue/...
One-way flow control valves GRXA, function combination
Technical data – Push-in connector QS, metal
One-way flow control function
Exhaust air
-M- Flow rate
130 … 280 l/min
-Q- Temperature range
–10 … +60 °C
-L- Operating pressure
0.5 … 10 bar
Function example: The function combination consists of
a one-way flow control valve and
a piloted non-return valve.
Exhaust air flow control is active as
long as a pilot signal from pneumatic
connection 21 is applied. If no pilot
signal is applied, the valve shuts off
the exhaust air. The compressed air
flows unthrottled through the non-
return valve in the supply air
direction.
Stop function and speed setting in
one housing
Swivel pilot connection 21 perpen
dicular to screw-in direction
Additional pilot connection 1 for
crossover interconnection, e.g. for
stop function with pressure failure
è Function example
General technical data
Valve function Exhaust air one-way flow control function
Pneumatic connection 2 Gx G¼
Pneumatic connection 1 QS-4, QS-6 QS-6, QS-8
Pneumatic connection 21/additional
pilot connection 1
QS-4 QS-4
Adjustment component Slotted head screw
Actuation type Pneumatic
Type of mounting Screw-in, via male thread
Mounting position Any
Switching time Off [ms] 44
On [ms] 6
Nominal tightening torque [Nm] 3.5 ±10% 11 ±10%
Operating and environmental conditions
Operating pressure complete
temperature range
[bar] 0.5 … 10
Pilot pressure p21 [bar] 2 … 10
Operating/pilot medium Compressed air in accordance with ISO 85731:2010 [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] –10 … +60
Temperature of medium [°C] –10 … +60
Storage temperature [°C] –10 … +40
-H- Note
Additional measures are required for
use in safety-related applications; in
Europe, for example, the standards
listed under the EC Machinery
Directive must be observed.
Without additional measures in
accordance with statutory minimum
requirements, the product is not suit
able for use in safety-related sections
of control systems.
2014/06 – Subject to change
35
è Internet: www.festo.com/catalogue/...
One-way flow control valves GRXA, function combination
Technical data – Push-in connector QS, metal
Standard nominal flow rate qnN at 6 > 5 bar
as a function of turns of the adjusting screw n
Standard flow rate qn at 6 > 0 bar
as a function of turns of the adjusting screw n
qnN [l/min]
n n
qn [l/min]
GRXA-HG-¼-QS-8,
GRXA-HG-¼-QS-6
GRXA-HG-x-QS-6
GRXA-HG-x-QS-4
GRXA-HG-¼-QS-8
GRXA-HG-¼-QS-6
GRXA-HG-x-QS-6
GRXA-HG-x-QS-4
Minimum pilot pressure p21 as a function of operating pressure p1
p21 [bar]
p1 [bar]
Materials
Sectional view
One-way flow control valve
1 Adjusting screw Brass
2 Cap Anodised wrought aluminium alloy
3 Swivel connection POM
4 Releasing ring POM
5 Hollow bolt Anodised wrought aluminium alloy
– Seals NBR
Note on materials RoHS-compliant
3
5
4
4
1
2
Subject to change – 2014/06
36
è Internet: www.festo.com/catalogue/...
One-way flow control valves GRXA, function combination
Technical data – Push-in connector QS, metal
Dimensions Download CAD data è www.festo.com
Slotted head screw
Type Connection Tubing O.D. B B1 D3 D4 D5 D6 H H1 H2 H3 L L1 L2 L3 ß 1 ß 2
D D1 D2
GRXA-HG-x Gx 4 4
28 15
14.5 15.9 9
10 41.8
34.5
33.5
15 49.5 4.9 44.6 17.4 13 12
4 6
31.5 17.3 12.5 41.8 34.5
GRXA-HG-¼ G¼ 4 6
36.1 19.5
19 20.6 9
12.5 52.2
42.7
40.5
21 56.3 5.6 51.4 21.1 17 16
4 8
40.3 21.5 17 58.2 48.7
Ordering data – Exhaust air one-way flow control function
Pneumatic
connection
Standard nominal flow rate qnN
at 6 > 5 bar
Standard flow rate qn
at 6 > 0 bar
Weight Part No. Type
in direction of
flow control
in non-return
direction
in direction of
flow control
in non-return
direction
2 1 [l/min] [l/min] [l/min] [l/min] [g]
Slotted head screw
Gx QS-4 130 100 … 140
100 … 140
1)
210 220 … 250
230 … 260
1)
28.2 525667 GRXA-HG-x-QS-4
QS-6 140 120 … 160
115 … 165
1)
280 260 … 300
270 … 300
1)
28.2 525668 GRXA-HG-x-QS-6
G¼ QS-6 280 180 … 260
200 … 270
1)
430 410 … 470
430 … 490
1)
58.8 525669 GRXA-HG-¼-QS-6
QS-8 280 190 … 260
200 … 280
1)
470 440 … 500
460 … 520
1)
58.8 525670 GRXA-HG-¼-QS-8
1) Unactuated
