One-way flow control valves
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
General information
Standard nominal flow rate qnN
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.
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.
Exhaust air one-way flow control
function
p1
Note
The documentation for the flow
control valves can be found at
è www.festo.com/catalogue
Pressure gauge
p2
Flow meter
(flow measuring device)
Test specimen
Supply air one-way flow control
function
Flow control valve
p1 Operating pressure
p2 Output pressure
Flow control function in both
directions
1
2
2
-H-
Flow measurement circuit
Pressure gauge
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).
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.
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1 Supply port (pneumatic connection 1)
2 Working line (pneumatic connection 2)
Subject to change – 2015/12
One-way flow control valves
Key features
Flow control functions and range of applications
Application
Description
Double-acting cylinder with one-way flow control valve
Exhaust 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).
Single-acting cylinder with one-way flow control valve
Exhaust air and supply air one-way flow control function
Adjustable speed during advance and
return strokes. The flow rate can be
adjusted differently for both directions.
Application examples
Mini slide SLT with one-way flow
control valve, standard
2015/12 – Subject to change
Flat cylinder DZF with one-way flow
control valve, mini
Application
Description
Supply air one-way flow control function
Adjustable speed during advance and
return strokes. The flow rate is identical
in both directions.
Single-acting cylinder with flow control valve
Flow control function in 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.
Multimount cylinder DMM with
one-way flow control valve, mini
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3
One-way flow control valves
Product range overview
Version
Valve function
Standard
Metal
Exhaust air oneway flow control
function
Version
Type
Connection
direction
Pneumatic
connection 1
Pneumatic
connection 2
qnN1)
Adjustment
component
è Page/
Internet
Slotted head
screw
8
[l/min]
GRLA
Supply air oneway flow control
function
Nickel-plated metal
Exhaust air oneway flow control
function
Polymer
Exhaust air oneway flow control
function
Flat
1)
2)
4
Polymer
Exhaust air oneway flow control
function
Elbow outlet
QS-3, QS-4,
QS-6, QS-8,
QS-10, QS-12
M5, GÁ, G¼, 100 … 1,580
GÅ, G½
M5, GÁ, G¼,
Gy, G½, G¾
M5, GÁ, G¼
PK-3, PK-4,
PK-6
M5, GÁ, G¼, 95 … 4,320
Gy, G½, G¾
M5, GÁ, G¼ 95 … 610
M5, GÁ, G¼ 83 … 540
Slotted head
screw
Knurled screw
Slotted head
screw
12
Knurled screw
12
GRLSA
Elbow outlet
QS-6, QS-8
GÁ, G¼
0 … 450
Rotary knob
with scale,
internal hex
17
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
12
PK-3, PK-4,
PK-6
M5, GÁ, G¼
83 … 540
Slotted head
screw
Knurled screw
Slotted head
screw
12
VFOC-S
Elbow outlet
QS-4, QS-6
Push-in
sleeve2) QS-4,
QS-6
100 … 270
Slotted head
screw
20
VFOH-LE
Elbow outlet
QS-4, QS-6,
QS-8, QS-10
GÁ, G¼
180 … 530
External hex
22
GRLA
Elbow outlet
QS-6, QS-8
GÁ, G¼, GÅ 520 … 650
Knurled screw
24
VFOF
Elbow outlet
QS-6, QS-8
GÁ, G¼
Internal hex
vfof
250 … 650
Standard nominal flow rate in direction of flow control.
Only suitable for push-in connector QS.
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Subject to change – 2015/12
One-way flow control valves
Product range overview
Version
Valve function
Mini
Metal
Exhaust air oneway flow control
function
Version
Type
Connection
direction
Pneumatic
connection 1
Pneumatic
connection 2
qnN1)
Adjustment
component
è Page/
Internet
[l/min]
Supply air oneway flow control
function
In-line
installation
Corrosionresistant
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
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
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
40 … 250
Knurled screw
gr
CRGRLA
Elbow outlet
M5, GÁ, G¼, M5, GÁ, G¼, 95 … 2,100
Gy, G½
Gy, G½
Slotted head
screw
31
GRXA
Elbow outlet
QS-4, QS-6,
QS-8
GÁ, G¼
130 … 280
Slotted head
screw
34
VFOF
Elbow outlet
QS-6, QS-8
GÁ, G¼
240 … 590
Internal hex
vfof
Stainless steel
Exhaust air oneway flow control
function
Function
Metal
combination Exhaust air oneway flow control
function
Polymer
Exhaust air oneway flow control
function
1)
GRLA
Standard nominal flow rate in direction of flow control.
2015/12 – Subject to change
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5
One-way flow control valves
Type codes
GRLA/GRLSA/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
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, Male thread
¼, y, ½,
¾
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,
Tubing O.D. with push-in connector QS
10, 12
3, 4, 6
Tubing I.D. with barbed connector PK
Adjustment component
–
RS
Slotted head screw
Knurled screw
Flow rate characteristic
LF
MF
Low flow
Medium flow
Generation
B
C
D
6
B series
C series
D series
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Subject to change – 2015/12
One-way flow control valves
Type codes
VOFC
VOFC
–
VOFH
–
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
S6
Push-in sleeve QS-4
Push-in sleeve QS-6
Pneumatic connection 1
Q4
Q6
Push-in connector QS-4
Push-in connector QS-6
VOFH-LE
L
E
–
A
–
G18
–
Q6
Type
VOFH
One-way flow control valve
Design
L
L-shaped outlet
Valve function
E
Exhaust air one-way flow control function
Adjusting element
A
External hex
Pneumatic connection 2
G18
G14
Thread Gx
Thread G¼
Pneumatic connection 1
Q4
Q6
Q8
Q10
Push-in connector QS-4
Push-in connector QS-6
Push-in connector QS-8
Push-in connector QS-10
2015/12 – Subject to change
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7
One-way flow control valves GRLA/GRLZ, standard
Technical data – Push-in connector QS, metal
-M-
One-way flow control function
Exhaust air
Supply air
-Q-L Can be swivelled 360° around the
screw-in axis after mounting
Flow rate
100 … 1,580 l/min
Temperature range
–10 … +60 °C
Operating pressure
0.2 … 10 bar
GRLA/GRLZ
GRLA-…-RS
General technical data – GRLA
Valve function
Pneumatic connection 2
Exhaust air one-way flow control function
M5
Gx
G¼
Gy
G½
Pneumatic connection 1
QS-3, QS-4, QS-6
QS-6, QS-8, QS-10
QS-6, QS-8, QS-10
QS-12
Adjustment component
Slotted head screw
Knurled screw
Screw-in, via male thread
Any
0.8 ±10%
3 ±10%
5 ±10%
10 ±10%
15 ±10%
Type of mounting
Mounting position
Nominal tightening torque
[Nm]
QS-3, QS-4, QS-6,
QS-8
General technical data – GRLZ
Valve function
Pneumatic connection 2
Supply air one-way flow control function
M5
Pneumatic connection 1
Adjustment component
Type of mounting
Mounting position
Nominal tightening torque
QS-3, QS-4, QS-6
Slotted head screw
Screw-in, via male thread
Any
0.8 ±10%
[Nm]
Gx
QS-3, QS-4, QS-6, QS-8
3 ±10%
Operating and environmental conditions
0.2 … 10
Standard nominal flow rate qnN at 6 > 5 bar
as a function of turns of the adjusting screw n
GRLA/GRLZ-M5
Standard flow rate qn at 6 > 0 bar
as a function of turns of the adjusting screw n
GRLA/GRLZ-M5
qn [l/min]
Compressed air in accordance with ISO 8573­1:2010 [7:4:4]
Operation with lubricated medium possible (in which case lubricated operation will always be required)
–10 … +60
–10 … +60
–10 … +40
Germanischer Lloyd
qnN [l/min]
Operating pressure complete [bar]
temperature range
Operating medium
Note on operating/pilot medium
Ambient temperature
[°C]
Temperature of medium
[°C]
Storage temperature
[°C]
Certification
n
8
n
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Subject to change – 2015/12
One-way flow control valves GRLA/GRLZ, standard
Standard nominal flow rate qnN at 6 > 5 bar
as a function of turns of the adjusting screw n
GRLA/GRLZ-x
Standard flow rate qn at 6 > 0 bar
as a function of turns of the adjusting screw n
GRLA/GRLZ-x
qnN [l/min]
qn [l/min]
Technical data – Push-in connector QS, metal
n
GRLA-x-…-MF/GRLA-¼
qn [l/min]
qnN [l/min]
GRLA-x-…-MF/GRLA-¼
n
n
n
GRLA-y
qn [l/min]
qnN [l/min]
GRLA-y
n
n
GRLA-½
qn [l/min]
qnN [l/min]
GRLA-½
n
2015/12 – Subject to change
n
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9
One-way flow control valves GRLA/GRLZ, standard
Technical data – Push-in connector QS, metal
Materials
Sectional view
1
One-way flow control valve
1
2
3
2
3
4
5
4
5
6
6
Knurled head (only
GRLA-…-RS)
Adjusting screw
Hollow bolt (only
GRLA-…-RS)
Releasing ring
Swivel connection
Threaded plug
–
Seals
Note on materials
GRL…-M5
GRL…-x
GRLA-y
GRLA-½
10
POM
Die-cast zinc, chromed
Wrought aluminium alloy
GRLA/GRLZ-M5: Brass
NBR
RoHS-compliant
Knurled screw
Connection
Tubing O.D.
D
D1
M5
3
4
6
3
4
6
8
6
8
6
8
10
6
8
10
12
Gx
GRLA-x-…-MF
GRLA-¼
Brass
Anodised wrought aluminium alloy
Download CAD data è www.festo.com
Dimensions
Slotted head screw
Type
Anodised wrought aluminium alloy
G¼
Gy
G½
B
D2

8.9
9.9
12
8.2 +0.15
10.0 ±0.2
12.0 ±0.2
10.2 ±0.2
10.2 ±0.2
12.5 ±0.2
14.5 ±0.2
12.5 ±0.2
14.5 ±0.2
12.5 ±0.2
14.5 ±0.2
17.5 ±0.2
12.5 ±0.2
14.5 ±0.2
17.5 ±0.2
13.8
17.8
22.4
27.8
20.5 ±0.15
D3

8.9 ±0.07
13.8 ±0.07
17.8 ±0.15
17.8 ±0.15
22.4 ±0.15
27.8 ±0.15
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H
H1
22.4
24.7
26.5
31.9
29.4
32.6
35.6
36.6
39.6
42.0
39.8
44.1
46.7
18
20.3
22
25
22.5
25.7
28.7
27.7
30.7
27.7
30.7
33.1
28.6
32.9
35.5
55.3
41.4
36.6
Lmax.
Slotted
Knurled
head screw
screw
21.4
31.3
L1
L2
3.7
11.65
+0.17/–0.25
40.4
5.1
+0.17/–0.25
31.5
–
31.5
48.3
36.0
55.3
42.3
65.7
13.7
17.2
5.9
+0.17/–0.25
6.95
+0.15/–0.3
8.15
+0.15/–0.3
8
10.65
14.4
26.9
ß
17.2
12
12
15
15
16.1
20.3
19.3
23.0
19
24
Subject to change – 2015/12
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
Standard nominal flow rate qnN
connection
at 6 > 5 bar
in direction of
in non-return
flow control
direction
2
1
[l/min]
[l/min]
Slotted head screw
M5
Gx
QS-3
QS-4
QS-6
QS-3
QS-4
QS-6
Gy
G½
Weight
Part No.
Type
193137
193138
193139
193142
193143
193144
537075
193145
537076
193146
193147
193148
193149
193150
193151
193152
GRLA-M5-QS-3-D
GRLA-M5-QS-4-D
GRLA-M5-QS-6-D
GRLA-x-QS-3-D
GRLA-x-QS-4-D
GRLA-x-QS-6-D
GRLA-x-QS-6-MF-D
GRLA-x-QS-8-D
GRLA-x-QS-8-MF-D
GRLA-¼-QS-6-D
GRLA-¼-QS-8-D
GRLA-¼-QS-10-D
GRLA-y-QS-6-D
GRLA-y-QS-8-D
GRLA-y-QS-10-D
GRLA-½-QS-12-D
124
197576
197577
197578
197579
197580
197581
534337
534338
534339
534340
534341
534342
534343
534344
GRLA-M5-QS-3-RS-D
GRLA-M5-QS-4-RS-D
GRLA-M5-QS-6-RS-D
GRLA-x-QS-3-RS-D
GRLA-x-QS-4-RS-D
GRLA-x-QS-6-RS-D
GRLA-x-QS-8-RS-D
GRLA-¼-QS-6-RS-D
GRLA-¼-QS-8-RS-D
GRLA-¼-QS-10-RS-D
GRLA-y-QS-6-RS-D
GRLA-y-QS-8-RS-D
GRLA-y-QS-10-RS-D
GRLA-½-QS-12-RS-D
Standard flow rate qn
at 6 > 0 bar
in direction of
in non-return
flow control
direction
[l/min]
[l/min]
Weight
Part No.
Type
135
160
170
200
300
340
370
13
193153
193154
193155
193156
193157
193158
193159
GRLZ-M5-QS-3-D
GRLZ-M5-QS-4-D
GRLZ-M5-QS-6-D
GRLZ-x-QS-3-D
GRLZ-x-QS-4-D
GRLZ-x-QS-6-D
GRLZ-x-QS-8-D
[g]
60 … 100
65 … 110
70 … 110
100 … 130
120 … 190
160 … 240
290 … 420
175 … 250
325 … 500
290 … 420
325 … 500
345 … 500
320 … 495
450 … 850
540 … 975
925 … 1,605
145
165
185
180
250
370
600
400
720
600
720
760
740
1,300
1,400
2,220
150 … 170
140 … 160
145 … 170
200 … 220
270 … 300
330 … 390
570 … 680
330 … 410
610 … 760
570 … 680
610 … 760
630 … 790
840 … 890
1,080 … 1,420
1,160 … 1,620
1,910 … 2,500
13
QS-6
QS-8
QS-10
QS-6
QS-8
QS-10
QS-12
100
110
115
130
160
185
400
215
475
400
475
480
495
820
900
1,580
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
100
110
115
130
160
185
215
400
475
480
495
820
900
1,580
60 … 100
65 … 110
70 … 110
100 … 130
120 … 190
160 … 240
175 … 250
290 … 420
325 … 500
345 … 500
320 … 495
450 … 850
540 … 975
925 … 1,605
145
165
185
180
250
370
400
600
720
760
740
1,300
1,400
2,220
150 … 170
140 … 160
145 … 170
200 … 220
270 … 300
330 … 390
330 … 410
570 … 680
610 … 760
630 … 790
840 … 890
1,080 … 1,420
1,160 … 1,620
1,910 … 2,500
14
QS-8
G¼
Standard flow rate qn
at 6 > 0 bar
in direction of
in non-return
flow control
direction
[l/min]
[l/min]
22
32
22
32
42
60
106
Knurled screw
M5
Gx
G¼
Gy
G½
Ordering data – Supply air one-way flow control function
Pneumatic
Standard nominal flow rate qnN
connection
at 6 > 5 bar
in direction of
in non-return
flow control
direction
2
1
[l/min]
[l/min]
Slotted head screw
M5
Gx
2015/12 – Subject to change
QS-3
QS-4
QS-6
QS-3
QS-4
QS-6
QS-8
100
110
115
130
160
185
215
60 … 100
65 … 110
70 … 110
100 … 130
120 … 190
160 … 240
175 … 250
130 … 160
150 … 180
160 … 200
180 … 200
260 … 290
390 … 460
390 … 470
23
24
50
72
[g]
22
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11
One-way flow control valves GRLA/GRLZ, standard
Technical data – Female thread/barbed connector, metal
-M-
One-way flow control function
Exhaust air
Supply air
-Q-L-
Flow rate
83 … 4,320 l/min
Temperature range
–10 … +60 °C
Operating pressure
0.2 … 10 bar
GRLA/GRLZ
General technical data – GRLA
Valve function
Connection type
Pneumatic connection 2
Pneumatic connection 1
Adjustment component
Type of mounting
Mounting position
Max. tightening torque
1)
[Nm]
Pneumatic connection 1
Adjustment component
Type of mounting
Mounting position
Max. tightening torque
Exhaust air one-way flow control function
Female thread
M5
Gx
G¼
Gy
G½
G¾
Barbed connector
M5
Gx
G¼
M51)
G½1)
G¾1)
PK-3, PK-4
PK-3, PK-4, PK-6
PK-4, PK-6
40
60
1.5
6
11
Supply air one-way flow control function
Female thread
M5
Gx
G¼
Barbed connector
M5
Gx
G¼
M51)
PK-3, PK-4
PK-3, PK-4, PK-6
PK-4, PK-6
Gx1)
G¼1)
Slotted head screw
Knurled screw
Screw-in
Any
1.5
6
11
Gy1)
–
20
[Nm]
Gx1)
Slotted head screw
Knurled screw
Screw-in
Any
1.5
6
G¼1)
–
11
1.5
6
11
G¼
Gy
G½
G¾
-H- Note: This product conforms to ISO 1179-1 and ISO 228-1.
Operating and environmental conditions
Pneumatic connection 2
M5
Operating pressure
[bar]
Operating medium
Note on operating/pilot medium
Ambient temperature
[°C]
Temperature of medium
[°C]
Storage temperature
[°C]
Certification
12
GRLA/GRLZ-…-PK
-H- Note: This product conforms to ISO 1179-1 and ISO 228-1.
General technical data – GRLZ
Valve function
Connection type
Pneumatic connection 2
1)
GRLA/GRLZ-…-RS
Gx
0.2 … 10
0.3 … 10
Compressed air in accordance with ISO 8573­1:2010 [7:4:4]
Operation with lubricated medium possible (in which case lubricated operation will always be required)
–10 … +60
–10 … +60
–10 … +40
GRLA: Germanischer Lloyd
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Subject to change – 2015/12
One-way flow control valves GRLA/GRLZ, standard
Standard nominal flow rate qnN at 6 > 5 bar
as a function of turns of the adjusting screw n
GRLA/GRLZ-M5
Standard flow rate qn at 6 > 0 bar
as a function of turns of the adjusting screw n
GRLA/GRLZ-M5
qnN [l/min]
qn [l/min]
Technical data – Female thread/barbed connector, metal
n
GRLA/GRLZ-x
qn [l/min]
qnN [l/min]
GRLA/GRLZ-x
n
n
n
GRLA/GRLZ-¼
qn [l/min]
qnN [l/min]
GRLA/GRLZ-¼
n
2015/12 – Subject to change
n
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13
One-way flow control valves GRLA/GRLZ, standard
Standard nominal flow rate qnN at 6 > 5 bar
as a function of turns of the adjusting screw n
GRLA-y
Standard flow rate qn at 6 > 0 bar
as a function of turns of the adjusting screw n
GRLA-y
qnN [l/min]
qn [l/min]
Technical data – Female thread/barbed connector, metal
n
n
GRLA-½
qn [l/min]
qnN [l/min]
GRLA-½
n
n
GRLA-¾
qn [l/min]
qnN [l/min]
GRLA-¾
n
n
Materials
Sectional view
1
One-way flow control valve
2
1
2
3
3
14
Adjusting screw
Swivel connection
Threaded plug
–
Seals
Note on materials
è Internet: www.festo.com/catalogue/...
Brass
Die-cast zinc
Wrought aluminium alloy
GRLA/GRLZ-M5: Nickel-plated brass
NBR
RoHS-compliant
Subject to change – 2015/12
One-way flow control valves GRLA/GRLZ, standard
Technical data – Female thread/barbed connector, metal
Download CAD data è www.festo.com
Dimensions – Female thread connection type
Slotted head screw
Type
Connection
D
GRL…-M5
GRL…-x
GRL…-¼
GRLA-y
GRLA-½
GRLA-¾
M5
Gx
G¼
Gy
G½
G¾
Knurled screw
Nominal size
B
H
H1
10 –0.15
16 –0.15
20 –0.2
25 –0.2
32 –0.2
41 –0.3
17.5
28
36
41
53
64
12.5
20
26
28.5
37
43.5
[mm]
2
4
6
8.5
10.6
14
L1
L2
ß
4.0 ±0.3
5.3 +0.45/–0.35
8.2 +0.45/–0.35
8.8 +0.45/–0.35
12.8 ±0.45
13.5 ±0.5
7.1
10.3
13.2
15.5
18.9
24.5
9
14
17
22
27
36
Lmax.
Slotted
Knurled
head screw
screw
17.6
25.2
30.8
37.2
48.6
60.2
27.3
38.6
54.8
–
–
–
-H- Note: This product conforms to ISO 1179-1 and to ISO 228-1
Download CAD data è www.festo.com
Dimensions – Barbed connector connection type
Slotted head screw
GRL…-M5
GRL…-x/GRL…-¼
3 Barbed connector
4 Union nut
Type
Connection
D
Nominal size
[mm]
GRL…-M5-PK-3
GRL…-M5-PK-4
GRL…-x-PK-3
GRL…-x-PK-4
GRL…-x-PK-6
GRL…-¼-PK-4
GRL…-¼-PK-6
M5
2
Gx
4
G¼
6
2015/12 – Subject to change
B
H
H1
L
max.
L1
L2
ß
10 –0.15
10 –0.15
16 –0.15
16 –0.15
16 –0.15
20 –0.2
20 –0.2
19.7
21.7
27.1
30.2
30.3
34.2
34.3
14.7
16.7
19.1
22.2
22.3
24.2
24.3
17.6
17.6
25.2
25.2
25.2
30.8
30.8
4.0 ±0.3
4.0 ±0.3
5.3 +0.45/–0.35
5.3 +0.45/–0.35
5.3 +0.45/–0.35
8.2 +0.45/–0.35
8.2 +0.45/–0.35
8.5
8.5
13.4
13.4
12.0
16.9
17.2
9
9
14
14
14
17
17
è Internet: www.festo.com/catalogue/...
15
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
Standard nominal flow rate qnN
connection
at 6 > 5 bar
in direction of flow in non-return
control
direction
2
1
[l/min]
[l/min]
Standard flow rate qn
at 6 > 0 bar
in direction of flow in non-return
control
direction
[l/min]
[l/min]
Weight
Slotted head screw
M5
Gx
G¼
Gy
G½
G¾
M5
Gx
G¼
Part No.
Type
[g]
M5
Gx
G¼
Gy
G½
G¾
95
340
610
1,450
2,100
4,320
76 … 95
260 … 420
450 … 820
970 … 1,600
1,550 … 2,200
3,220 … 4,720
169
615
1,200
2,300
4,000
7,300
135 … 170
470 … 760
885 … 1,615
1,540 … 2,540
2,950 … 4,190
5,440 … 7,300
11
28
59
97
204
377
151160
151165
151172
151178
151179
151180
GRLA-M5-B
GRLA-x-B
GRLA-¼-B
GRLA-y-B
GRLA-½-B
GRLA-¾-B
PK-3
PK-4
PK-31)
PK-41)
PK-61)
PK-41)
PK-61)
83
83
110
230
300
260
540
72 … 83
76 … 88
100 … 110
190 … 240
210 … 290
220 … 260
410 … 585
140
140
162
360
455
370
840
120 … 140
128 … 148
145 … 165
295 … 375
320 … 440
315 … 370
635 … 910
10
10
22
25
26
44
45
151161
151162
151166
151167
151168
151173
151174
GRLA-M5-PK-3-B
GRLA-M5-PK-4-B
GRLA-x-PK-3-B
GRLA-x-PK-4-B
GRLA-x-PK-6-B
GRLA-¼-PK-4-B
GRLA-¼-PK-6-B
M5
Gx
G¼
95
340
610
76 … 95
260 … 420
450 … 820
169
615
1,200
135 … 170
470 … 760
885 … 1,615
12
30
59
151163
151169
151175
GRLA-M5-RS-B
GRLA-x-RS-B
GRLA-¼-RS-B
Part No.
Type
Knurled screw
M5
Gx
G¼
1)
Via union nut
Ordering data – Supply air one-way flow control function
Pneumatic
Standard nominal flow rate qnN
connection
at 6 > 5 bar
in direction of
in non-return
flow control
direction
2
1
[l/min]
[l/min]
Standard flow rate qn
at 6 > 0 bar
in direction of
in non-return
flow control
direction
[l/min]
[l/min]
Weight
Slotted head screw
M5
Gx
G¼
M5
Gx
G¼
[g]
M5
Gx
G¼
95
340
610
76 … 95
260 … 420
450 … 820
169
615
1,200
135 … 170
470 … 760
885 … 1,615
11
28
59
151183
151188
151195
GRLZ-M5-B
GRLZ-x-B
GRLZ-¼-B
PK-3
PK-4
PK-31)
PK-41)
PK-61)
PK-41)
PK-61)
83
83
110
230
300
260
540
72 … 83
76 … 88
100 … 110
190 … 240
210 … 290
220 … 260
410 … 585
140
140
162
360
455
370
840
120 … 140
125 … 150
145 … 165
295 … 375
320 … 440
315 … 370
635 … 910
10
10
22
25
26
44
45
151184
151185
151189
151190
151191
151196
151197
GRLZ-M5-PK-3-B
GRLZ-M5-PK-4-B
GRLZ-x-PK-3-B
GRLZ-x-PK-4-B
GRLZ-x-PK-6-B
GRLZ-¼-PK-4-B
GRLZ-¼-PK-6-B
M5
Gx
G¼
95
340
610
76 … 95
260 … 420
450 … 820
169
615
1,200
135 … 170
470 … 760
885 … 1,615
12
30
59
151186
151192
151198
GRLZ-M5-RS-B
GRLZ-x-RS-B
GRLZ-¼-RS-B
Knurled screw
M5
Gx
G¼
1)
16
Via union nut
è Internet: www.festo.com/catalogue/...
Subject to change – 2015/12
One-way flow control valves GRLSA, standard
Technical data – Push-in connector QS, metal
-M-
One-way flow control function
Exhaust air
-Q-L-
This one-way flow control valve offers
the ideal conditions for optimum and
easy setting of the flow rate in
a unique design.
Flow rate
0 … 450 l/min
Temperature range
–10 … +60 °C
Operating pressure
0.2 … 10 bar
There are two setting options:
General technical data
Valve function
Pneumatic connection 2
Exhaust air one-way flow control function
Gx
Pneumatic connection 1
Adjustment component
Actuation type
Type of mounting
Mounting position
Nominal tightening torque
QS-6
Rotary knob with scale and internal hex
Manual
Screw-in
Any
3.5 ±20%
[Nm]
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
G¼
QS-8
11 ±10%
Operating and environmental conditions
Operating pressure complete [bar]
temperature range
Operating medium
Note on operating/pilot medium
Ambient temperature
[°C]
Temperature of medium
[°C]
Storage temperature
[°C]
2015/12 – Subject to change
0.2 … 10
Compressed air in accordance with ISO 8573­1:2010 [7:4:4]
Operation with lubricated medium possible (in which case lubricated operation will always be required)
–10 … +60
–10 … +60
–10 … +40
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17
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
GRLSA-x
Standard flow rate qn at 6 > 0 bar
as a function of the position of the flow control screw (scale) n
GRLSA-x
GRLSA-¼
GRLSA-¼
Flow rate value tolerance: _20%
Stage: A
Stage: B
Stage: C
Stage: D
Stage: E
Materials
Sectional view
One-way flow control valve
1
1 Adjusting screw
2 Swivel connection
3 Releasing ring
4 Hollow bolt
–
Seals
Note on materials
2
3
4
18
è Internet: www.festo.com/catalogue/...
PA, reinforced
Die-cast zinc
POM
Anodised wrought aluminium alloy
NBR
RoHS-compliant
Free of copper and PTFE
Subject to change – 2015/12
One-way flow control valves GRLSA, standard
Technical data – Push-in connector QS, metal
Download CAD data è www.festo.com
Dimensions
Rotary knob with scale and internal hex
Type
GRLSA-x
GRLSA-¼
Connection
Tubing O.D.
D
D1
Gx
G¼
6
8
B
B1
B2
H
L
max.
L1
L2
L3
ß1
ß2
12.5
14.5
13.8
17.8
15
18.8
25.7
30.75
36.6
46.5
5.1
7
13.5
17.2
2
3
12
15
3
3
Ordering data – Exhaust air one-way flow control function
Pneumatic
Standard nominal flow rate qnN
connection
at 6 > 5 bar
in direction of
in non-return
flow control
direction
2
1
[l/min]
[l/min]
Standard flow rate qn
at 6 > 0 bar
in direction of
in non-return
flow control
direction
[l/min]
[l/min]
Weight
Rotary knob with scale and internal hex
Gx
QS-6
0 … 250
G¼
QS-8
0 … 450
0 … 410
0 … 700
19.5
34.8
2015/12 – Subject to change
180 … 310
390 … 570
430 … 540
820 … 930
Part No.
Type
540661
540662
GRLSA-x-QS-6
GRLSA-¼-QS-8
[g]
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19
One-way flow control valves VFOC, standard
Technical data – Push-in connector QS, metal
One-way flow control function
Supply air
-M-Q-L-
Flow rate
0 … 270 l/min
Temperature range
–10 … +60 °C
Operating pressure
0.2 … 10 bar
General technical data
Valve function
Pneumatic connection 2
Supply air one-way flow control function
Push-in sleeve QS-4
Pneumatic connection 1
Note on the pneumatic connection 2
Adjustment component
Actuation type
Type of mounting
Mounting position
QS-4
Only suitable for push-in connector QS from Festo
Slotted head screw
Manual
Plug-in, with push-in sleeve
Any
Push-in sleeve QS-6
QS-6
Operating and environmental conditions
Operating pressure
[bar]
Operating medium
Note on operating/pilot medium
Ambient temperature
[°C]
Temperature of medium
[°C]
Storage temperature
[°C]
0.2 … 10
Compressed air in accordance with ISO 8573­1:2010 [7:4:4]
Operation with lubricated medium possible (in which case lubricated operation will always be required)
–10 … +60
–10 … +60
–10 … +40
Standard nominal flow rate qnN at 6 > 5 bar
as a function of turns of the adjusting screw n
QS-6
QS-4
20
Standard flow rate qn at 6 > 0 bar
as a function of turns of the adjusting screw n
QS-6
QS-4
è Internet: www.festo.com/catalogue/...
Subject to change – 2015/12
One-way flow control valves VFOC, standard
Technical data – Push-in connector QS, metal
Materials
Sectional view
1
One-way flow control valve
2
3
1
2
3
4
4
–
Seals
Note on materials
Adjusting screw
Swivel connection
Releasing ring
Hollow bolt
High-alloy stainless steel
Die-cast zinc
POM
Black anodised wrought aluminium
alloy
NBR
RoHS-compliant
Download CAD data è www.festo.com
Dimensions
Slotted head screw
-H-
Note
è www.festo.com/catalogue.
This combination alone guarantees
a secure grip in the push-in fitting.
The push-in sleeves of the one-way
flow control valves VFOC are
exclusively matched to push-in
fittings QS from Festo
Type
Push-in
sleeve 
D
Tubing O.D.
VFOC-S-S4-Q4
VFOC-S-S6-Q6
4
6
4
6
D2

D3

H
H1
L
L1
L2
10
12.5
8.9
13.8
24.7
32.6
20.3
25.7
23.2
28
14.8
16.5
13.2
15.8
D1
Ordering data – Supply air one-way flow control function
Pneumatic
Standard nominal flow rate qnN
connection
at 6 > 5 bar
in direction of
in non-return
flow control
direction
2
1
[l/min]
[l/min]
Slotted head screw
Push-in
sleeve
QS-4
Push-in
sleeve
QS-6
2015/12 – Subject to change
Standard flow rate qn
at 6 > 0 bar
in direction of
in non-return
flow control
direction
[l/min]
[l/min]
Weight
Part No.
Type
[g]
QS-4
0 … 100
60 … 100
0 … 170
130 … 160
9.2
559723
VFOC-S-S4-Q4
QS-6
0 … 270
170 … 260
0 … 430
330 … 400
21.6
559724
VFOC-S-S6-Q6
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21
-V- New
One-way flow control valves VFOH-LE, standard
Technical data – Push-in connector QS, nickel-plated metal
-M-
One-way flow control function
Exhaust air
-Q-L 360° orientable around the screwin axis after mounting
Flow rate
180 … 530 l/min
Temperature range
0 … +150 °C
Operating pressure
0.2 … 10 bar
General technical data
Valve function
Pneumatic connection 2
Exhaust air one-way flow control function
Gx
Pneumatic connection 1
Adjustment element
Actuation type
Type of mounting
Mounting position
Nominal tightening torque
QS-4, QS-6, QS-8
External hex
Manual
Screw-in
Any
3 ±10%
[Nm]
G¼
QS-8, QS-10
5 ±10%
Operating and environmental conditions
Operating pressure complete [bar]
temperature range
Operating medium
Note on operating/pilot medium
Ambient temperature
[°C]
Temperature of medium
[°C]
Storage temperature
[°C]
Corrosion resistance class CRC1)
1)
0.2 … 10
Compressed air in accordance with ISO 8573­1:2010 [7:4:4]
Operation with lubricated medium possible (in which case lubricated operation will always be required)
0 … +150
0 … +150
–10 … +150
3
CRC3: Corrosion resistance class to Festo standard 940 070
Components with heavy corrosion exposure. Externally visible components in direct contact with normal industrial atmosphere or media such as solvents and cleaning agents, where the surface requirement is
predominantly functional.
Standard nominal flow rate qnN at 6 } 5 bar as a function of turns of the adjusting screw n
VFOH-LE-A-G18
VFOH-LE-A-G14
QS-4
QS-6
QS-8
22
QS-8
QS-10
è Internet: www.festo.com/catalogue/...
Subject to change – 2015/12
-V- New
One-way flow control valves VFOH-LE, standard
Technical data – Push-in connector QS, nickel-plated metal
Materials
Sectional view
One-way flow control valve
1
1 Adjusting screw
2 Swivel connection
3 Releasing ring
4 Hollow bolt
–
Seals
Note on materials
2
3
4
High-alloy stainless steel
Nickel-plated brass
Nickel-plated brass
Wrought aluminium alloy
FPM
RoHS-compliant
Free of copper and PTFE
Download CAD data è www.festo.com
Dimensions
External hex
Type
VFOH-LE-A-G18
VFOH-LE-A-G14
Connection
Tubing O.D.
D3
D1
Gx
4
6
8
8
10
G¼
D2

10.5
12
14
14
17.7
D4

14
18
Ordering data – Exhaust air one-way flow control function
Pneumatic
Standard nominal flow rate qnN
connection
at 6 > 5 bar
in direction of
in non-return
flow control
direction
2
1
[l/min]
[l/min]
H1
H2
28
31
32
36
41
21
24
25
27
32
L1
L2
L3
ß1
ß2
36.3
5.2
14.8
12
4
39.9
6.1
17.5
15
5
Standard flow rate qn
at 6 > 0 bar
in direction of
in non-return
flow control
direction
[l/min]
[l/min]
Weight
250
370
400
720
840
25
Part No.
Type
578797
578798
578799
578800
578801
VFOH-LE-A-G18-Q4
VFOH-LE-A-G18-Q6
VFOH-LE-A-G18-Q8
VFOH-LE-A-G14-Q8
VFOH-LE-A-G14-Q10
[g]
External hex
Gx
G¼
2015/12 – Subject to change
QS-4
QS-6
QS-8
QS-8
QS-10
180
255
275
530
520
103 … 188
111 … 280
132 … 307
402 … 578
345 … 535
270 … 300
330 … 390
330 … 410
610 … 760
635 … 790
37
48
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23
One-way flow control valves GRLA, standard
Technical data – Push-in connector QS, polymer
-M-
One-way flow control function
Exhaust air
-Q-L Can be swivelled 360° around the
screw-in axis after mounting
General technical data
Valve function
Pneumatic connection 2
Flow rate
520 … 650 l/min
Temperature range
–10 … +60 °C
Operating pressure
0.2 … 10 bar
Exhaust air one-way flow control function
Gx
G¼
Pneumatic connection 1
Adjustment component
Actuation type
Type of mounting
Mounting position
Nominal tightening torque
Perm. actuation torque for
regulating screw
QS-6, QS-8
Knurled screw
Manual
Screw-in
Any
3.5 ±20%
0.4
[Nm]
[Nm]
Gy
QS-6, QS-8
QS-6, QS-8
11 ±10%
12.5 ±20%
Operating and environmental conditions
Operating pressure complete [bar]
temperature range
Operating medium
Note on operating/pilot medium
Ambient temperature
[°C]
Temperature of medium
[°C]
Storage temperature
[°C]
Corrosion resistance class CRC1)
Compressed air in accordance with ISO 8573­1:2010 [7:4:4]
Operation with lubricated medium possible (in which case lubricated operation will always be required)
–10 … +60
–10 … +60
–10 … +40
2
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
qn [l/min]
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.
qnN [l/min]
1)
0.2 … 10
n
24
n
è Internet: www.festo.com/catalogue/...
Subject to change – 2015/12
One-way flow control valves GRLA, standard
Technical data – Push-in connector QS, polymer
Materials
Sectional view
1
One-way flow control valve
1
2
3
4
5
–
2
3
4
Knurled head
Regulating screw
Swivel connection
Releasing ring
Threaded plug
Seals
Wrought aluminium alloy
Brass
PBT, reinforced
POM
Wrought aluminium alloy
TPE-U(PU)
NBR
RoHS-compliant
Note on materials
5
Download CAD data è www.festo.com
Dimensions
Knurled screw
Type
Connection
Tubing O.D.
D
D1
GRLA-x
Gx
GRLA-¼
G¼
GRLA-y
Gy
6
8
6
8
6
8
D2

13.0 ±0.25
16.8 ±0.4
13.0 ±0.25
16.8 ±0.4
13.0 ±0.25
16.8 ±0.4
D3
H1
17.9 –0.1
17.9 –0.1
17.9 –0.1
Ordering data – Exhaust air one-way flow control function
Pneumatic connec­
Standard nominal flow rate qnN
tion
at 6 > 5 bar
in direction of
in non-return
flow control
direction
2
1
[l/min]
[l/min]
27.2
35.4
27.2
35.4
27.2
35.4
L
max.
L1
L2
ß
48
4.9
22.6
13
48
5.8
22.3
17
48
6.8
22.3
19
Standard flow rate qn
at 6 > 0 bar
in direction of
in non-return
flow control
direction
[l/min]
[l/min]
Weight
720
1,080
720
1,130
720
1,130
25
Part No.
Type
162965
162966
162967
162968
162969
162970
GRLA-x-QS-6-RS-B
GRLA-x-QS-8-RS-B
GRLA-¼-QS-6-RS-B
GRLA-¼-QS-8-RS-B
GRLA-y-QS-6-RS-B
GRLA-y-QS-8-RS-B
[g]
Knurled screw
Gx
G¼
Gy
2015/12 – Subject to change
QS-6
QS-8
QS-6
QS-8
QS-6
QS-8
520
650
520
650
530
650
400 … 550
600 … 750
400 … 550
600 … 750
400 … 550
600 … 750
600 … 750
800 … 1,250
600 … 750
800 … 1,250
600 … 750
800 … 1,250
30
40
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25
One-way flow control valves GRLA/GRLZ/GRGA/GRGZ, mini
Technical data – Push-in connector QS, metal
-M-
One-way flow control function
Exhaust air
Supply air
-Q-L Low flow: precision adjustment for
low speed
Flow rate
40 … 48 l/min
Temperature range
–10 … +60 °C
Operating pressure
0.2 … 10 bar
GRLA/GRLZ
General technical data – GRLA/GRGA
Valve function
Pneumatic connection 2
Exhaust air one-way flow control function
M3
Pneumatic connection 1
Adjustment component
Type of mounting
Mounting position
Max. tightening torque
QS-3
Slotted head screw
Screw-in
Any
0.3
[Nm]
General technical data – GRLZ/GRGZ
Valve function
Pneumatic connection 2
Supply air one-way flow control function
M3
Pneumatic connection 1
Adjustment component
Type of mounting
Mounting position
Max. tightening torque
QS-3
Slotted head screw
Screw-in
Any
0.3
[Nm]
GRGA/GRGZ
M5
QS-3, QS-4
1.5
M5
QS-3, QS-4
1.5
Operating and environmental conditions
Operating pressure
[bar]
Operating medium
Note on operating/pilot medium
Ambient temperature
[°C]
Temperature of medium
[°C]
Storage temperature
[°C]
Certification
26
0.2 … 10
Compressed air in accordance with ISO 8573­1:2010 [7:4:4]
Operation with lubricated medium possible (in which case lubricated operation will always be required)
–10 … +60
–10 … +60
–10 … +40
GRLA: Germanischer Lloyd
è Internet: www.festo.com/catalogue/...
Subject to change – 2015/12
One-way flow control valves GRLA/GRLZ/GRGA/GRGZ, mini
Standard nominal flow rate qnN at 6 > 5 bar
as a function of turns of the adjusting screw n
GRLA/GRLZ/GRGA/GRGZ-M3
Standard flow rate qn at 6 > 0 bar
as a function of turns of the adjusting screw n
GRLA/GRLZ/GRGA/GRGZ-M3
qnN [l/min]
qn [l/min]
Technical data – Push-in connector QS, metal
n
n
GRLA/GRLZ-M5
qnN [l/min]
GRLA/GRLZ-M5
n
Materials
Sectional view
1
2
3
4
2015/12 – Subject to change
One-way flow control valve
1 Adjusting screw
2 Swivel connection
3 Releasing ring
4 Threaded plug
–
Seals
Note on materials
Brass
Die-cast zinc
POM
Nickel-plated brass
NBR
RoHS-compliant
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27
One-way flow control valves GRLA/GRLZ/GRGA/GRGZ, mini
Technical data – Push-in connector QS, metal
Download CAD data è www.festo.com
Dimensions
GRLA/GRLZ, elbow outlet
Type
GRLA/GRLZ
GRGA/GRGZ
GRGA/GRGZ, parallel outlet
Connection
Nominal size Tubing O.D.
D
[mm]
D1
M3
M5
1.4
1.4
1.4
M3
1.4
L
max.
L1
L2
L3
ß
–
16.6
17.7
17.7
2.3 +0.15/–0.3
3.1 +0.15/–0.35
3.1 +0.15/–0.35
7
7.3
7.3
–
7
9.25
16.6
2.3 +0.15/–0.3
7.5
22
7
B
H
H1
H2
3
3
4
8 –0.15
9.8 –0.15
9.8 –0.15
20
22.4
22.2
15.8
18.4
18.2
3
8 –0.15
18
14
Ordering data – Exhaust air one-way flow control function
Pneumatic
Standard nominal flow rate qnN
connection
at 6 > 5 bar
in direction of
in non-return
flow control
direction
2
1
[l/min]
[l/min]
Standard flow rate qn
at 6 > 0 bar
in direction of
in non-return
flow control
direction
[l/min]
[l/min]
Weight
Slotted head screw
M3
QS-3
41
27 … 50
95
75 … 110
M5
QS-3
40
46 … 70
80
90 … 140
QS-4
40
50 … 75
80
QS-3
41
27 … 50
95
M3
Part No.
Type
7
175041
GRLA-M3-QS-3
9
175053
GRLA-M5-QS-3-LF-C
100 … 150
9
175056
GRLA-M5-QS-4-LF-C
75 … 110
14
175044
GRGA-M3-QS-3
Part No.
Type
[g]
Ordering data – Supply air one-way flow control function
Pneumatic
Standard nominal flow rate qnN
connection
at 6 > 5 bar
in direction of
in non-return
flow control
direction
2
1
[l/min]
[l/min]
Standard flow rate qn
at 6 > 0 bar
in direction of
in non-return
flow control
direction
[l/min]
[l/min]
Weight
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
QS-3
41
27 … 44
95
75 … 100
14
175046
GRGZ-M3-QS-3
M3
28
è Internet: www.festo.com/catalogue/...
[g]
Subject to change – 2015/12
One-way flow control valves GRLA/GRLZ, mini
Technical data – Female thread, metal
-M-
One-way flow control function
Exhaust air
Supply air
-Q-L-
Flow rate
0 … 18 l/min
Temperature range
–10 … +60 °C
Operating pressure
0.2 … 10 bar
General technical data – GRLA
Valve function
Pneumatic connection 2
Exhaust air one-way flow control function
M3
Pneumatic connection 1
Adjustment component
Type of mounting
Mounting position
Max. tightening torque
M3
Slotted head screw
Screw-in
Any
0.3
[Nm]
General technical data – GRLZ
Valve function
Pneumatic connection 2
Supply air one-way flow control function
M3
Pneumatic connection 1
Adjustment component
Type of mounting
Mounting position
Max. tightening torque
M3
Slotted head screw
Screw-in
Any
0.3
[Nm]
Operating and environmental conditions
Operating pressure
[bar]
Operating medium
Note on operating/pilot medium
Ambient temperature
[°C]
Temperature of medium
[°C]
Storage temperature
[°C]
Certification
0.2 … 10
Compressed air in accordance with ISO 8573­1:2010 [7:4:4]
Operation with lubricated medium possible (in which case lubricated operation will always be required)
–10 … +60
–10 … +60
–10 … +40
GRLA: Germanischer Lloyd
Standard flow rate qn at 6 > 0 bar
as a function of turns of the adjusting screw n
qnN [l/min]
Standard nominal flow rate qnN at 6 > 5 bar
as a function of turns of the adjusting screw n
n
2015/12 – Subject to change
è Internet: www.festo.com/catalogue/...
29
One-way flow control valves GRLA/GRLZ, mini
Technical data – Female thread, metal
Materials
Sectional view
1
One-way flow control valve
2
1 Adjusting screw
2 Swivel connection
3 Threaded plug
–
Seals
Note on materials
3
Brass
Die-cast zinc
Nickel-plated brass
NBR
RoHS-compliant
Download CAD data è www.festo.com
Dimensions
Slotted head screw
Type
GRLA/GRLZ
Connection
Nominal size
D
[mm]
M3
0.8
B
H
H1
L
max.
L1
L2
ß
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
Standard nominal flow rate qnN
connection
at 6 > 5 bar
in direction of
in non-return
flow control
direction
2
1
[l/min]
[l/min]
Standard flow rate qn
at 6 > 0 bar
in direction of
in non-return
flow control
direction
[l/min]
[l/min]
Weight
Slotted head screw
M3
33
M3
18
18 … 20
33 … 37
Part No.
Type
2
175038
GRLA-M3
Part No.
Type
175040
GRLZ-M3
[g]
Ordering data – Supply air one-way flow control function
Pneumatic
Standard nominal flow rate qnN
connection
at 6 > 5 bar
in direction of
in non-return
flow control
direction
2
1
[l/min]
[l/min]
Standard flow rate qn
at 6 > 0 bar
in direction of
in non-return
flow control
direction
[l/min]
[l/min]
Weight
Slotted head screw
M3
33
2
30
M3
18
18 … 20
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33 … 37
[g]
Subject to change – 2015/12
One-way flow control valves CRGRLA, corrosion-resistant
Technical data – Female thread, stainless steel
-M-
One-way flow control function
Exhaust air
-Q-L-
General technical data
Valve function
Pneumatic connection 2
Pneumatic connection 1
Adjustment component
Type of mounting
Mounting position
Max. tightening torque
Perm. actuation torque for
regulating screw
Flow rate
95 … 2,100 l/min
Temperature range
–20 … +80 °C
Operating pressure
0.2 … 10 bar
Exhaust air one-way flow control function
M5
Gx
[Nm]
[Nm]
M5
Slotted head screw
Screw-in
Any
1.5
0.2
G¼
Gy
G½
Gx
G¼
Gy
G½
6
0.5
11
1.5
20
2
40
3
Gx
G¼
Gy
G½
-H- Note: This product conforms to ISO 1179-1 and to ISO 228-1
Operating and environmental conditions
Pneumatic connection 2
M5
Operating pressure
[bar]
Operating medium
Note on operating/pilot medium
Ambient temperature
[°C]
Temperature of medium
[°C]
Storage temperature
[°C]
Corrosion resistance class CRC1)
Certification
Standard nominal flow rate qnN at 6 > 5 bar
as a function of turns of the adjusting screw n
CRGRLA-M5, CRGRLA-x
Standard flow rate qn at 6 > 0 bar
as a function of turns of the adjusting screw n
CRGRLA-M5, CRGRLA-x
qn [l/min]
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.
qnN [l/min]
1)
0.2 … 10
0.3 … 10
Compressed air in accordance with ISO 8573­1:2010 [7:4:4]
Operation with lubricated medium possible (in which case lubricated operation will always be required)
–20 … +80
–10 … +60
–10 … +40
3
Germanischer Lloyd
n
2015/12 – Subject to change
n
è Internet: www.festo.com/catalogue/...
31
One-way flow control valves CRGRLA, corrosion-resistant
Standard nominal flow rate qnN at 6 > 5 bar
as a function of turns of the adjusting screw n
CRGRLA-¼, CRGRLA-y, CRGRLA-½
Standard flow rate qn at 6 > 0 bar
as a function of turns of the adjusting screw n
CRGRLA-¼, CRGRLA-y, CRGRLA-½
qnN [l/min]
qn [l/min]
Technical data – Female thread, stainless steel
n
n
Materials
Sectional view
1
One-way flow control valve
1 Regulating screw
2 Swivel connection
3 Hollow bolt
–
Seals
Note on materials
2
High-alloy stainless steel
High-alloy stainless steel
High-alloy steel
FPM, PVC
RoHS-compliant
3
Download CAD data è www.festo.com
CRGRLA-x, CRGRLA-¼, CRGRLA-y, CRGRLA-½
Dimensions
CRGRLA-M5
Type
Connection
D
Nominal size
[mm]
CRGRLA-M5
CRGRLA-x
CRGRLA-¼
CRGRLA-y
CRGRLA-½
M5
Gx
G¼
Gy
G½
2
4
6
8.5
10.6
B
H
H1
L
L1
L2
L3
ß
10 –0.25
16 –0.4
20 –0.3
25 –0.3
32 –0.4
17.5 ±0.3
28 +0.4/–0.3
36 +0.4/–0.2
41 +0.4/–0.2
53 ±0.5
12.5
20
26
28.5
37
23.2
33.7
38.8
48.5
62.2
4
5.5
6.5
7.5
9
7.1
10.3
13.2
15.4
18.9
2.5
3.5
3.5
5
7.5
9
14
17
22
27
-H- Note: This product conforms to ISO 1179-1 and to ISO 228-1
32
è Internet: www.festo.com/catalogue/...
Subject to change – 2015/12
One-way flow control valves CRGRLA, corrosion-resistant
Technical data – Female thread, stainless steel
Ordering data – Exhaust air one-way flow control function
Pneumatic
Standard nominal flow rate qnN
connection
at 6 > 5 bar
in direction of
in non-return
flow control
direction
2
1
[l/min]
[l/min]
Standard flow rate qn
at 6 > 0 bar
in direction of
in non-return
flow control
direction
[l/min]
[l/min]
Weight
Slotted head screw
M5
Gx
G¼
Gy
G½
165
580
1,265
2,515
4,265
10.2
37.8
71.6
126.9
262.3
M5
Gx
G¼
Gy
G½
2015/12 – Subject to change
95
340
610
1,450
2,100
77 … 95
260 … 420
450 … 820
970 … 1,600
1,550 … 2,200
140 … 150
530 … 590
1,030 … 1,345
2,095 … 2,665
3,550 … 4,325
Part No.
Type
161403
161404
161405
161406
161407
CRGRLA-M5-B
CRGRLA-x-B
CRGRLA-¼-B
CRGRLA-y-B
CRGRLA-½-B
[g]
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33
One-way flow control valves GRXA, function combination
Technical data – Push-in connector QS, metal
One-way flow control function
Exhaust air
-M-Q-L-
Function example:
Flow rate
130 … 280 l/min
Temperature range
–10 … +60 °C
Operating pressure
0.5 … 10 bar
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 nonreturn valve in the supply air
direction.
General technical data
Valve function
Pneumatic connection 2
Pneumatic connection 1
Pneumatic connection 21/additional
pilot connection 1
Adjustment component
Actuation type
Type of mounting
Mounting position
Switching time
Off
[ms]
On
[ms]
Nominal tightening torque
[Nm]
Stop function and speed setting in
one housing
Swivel pilot connection 21 perpen­
dicular to screw-in direction
Exhaust air one-way flow control function
Gx
G¼
QS-4, QS-6
QS-4
QS-6, QS-8
QS-4
Slotted head screw
Pneumatic
Screw-in, via male thread
Any
44
6
3.5 ±10%
11 ±10%
Additional pilot connection 1 for
crossover interconnection, e.g. for
stop function with pressure failure
è Function example
Operating and environmental conditions
Operating pressure complete [bar]
temperature range
Pilot pressure p21
[bar]
Operating/pilot medium
Note on operating/pilot medium
Ambient temperature
[°C]
Temperature of medium
[°C]
Storage temperature
[°C]
-H-
2 … 10
Compressed air in accordance with ISO 8573­1:2010 [7:4:4]
Operation with lubricated medium possible (in which case lubricated operation will always be required)
–10 … +60
–10 … +60
–10 … +40
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.
34
0.5 … 10
Without additional measures in
accordance with statutory minimum
requirements, the product is not suit­
able for use in safety-related sections
of control systems.
è Internet: www.festo.com/catalogue/...
Subject to change – 2015/12
One-way flow control valves GRXA, function combination
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]
qn [l/min]
Technical data – Push-in connector QS, metal
n
GRXA-HG-¼-QS-8,
GRXA-HG-¼-QS-6
GRXA-HG-x-QS-6
GRXA-HG-x-QS-4
n
GRXA-HG-¼-QS-8
GRXA-HG-¼-QS-6
GRXA-HG-x-QS-6
GRXA-HG-x-QS-4
p21 [bar]
Minimum pilot pressure p21 as a function of operating pressure p1
p1 [bar]
Materials
Sectional view
4
1
2
3
4
One-way flow control valve
1 Adjusting screw
2 Cap
3 Swivel connection
4 Releasing ring
5 Hollow bolt
–
Seals
Note on materials
Brass
Anodised wrought aluminium alloy
POM
POM
Anodised wrought aluminium alloy
NBR
RoHS-compliant
5
2015/12 – Subject to change
è Internet: www.festo.com/catalogue/...
35
One-way flow control valves GRXA, function combination
Technical data – Push-in connector QS, metal
Download CAD data è www.festo.com
Dimensions
Slotted head screw
Type
Connection
Tubing O.D.
D
D1
D2
GRXA-HG-x
Gx
GRXA-HG-¼
G¼
4
4
4
4
4
6
6
8
B
B1
28
15
31.5 17.3
36.1 19.5
40.3 21.5
D3

D4

D5

14.5
15.9
9
19
20.6
9
D6

10
12.5
12.5
17
H
H1
H2
41.8
33.5
34.5
41.8
34.5
52.2
40.5
42.7
58.2
48.7
H3
12
21
56.3 5.6
51.4 21.1
17
16
210
G¼
1)
36
QS-6
140
QS-6
280
QS-8
280
280
430
470
ß1 ß2
13
Slotted head screw
Gx
220 … 250
230 … 2601)
260 … 300
270 … 3001)
410 … 470
430 … 4901)
440 … 500
460 … 5201)
L3
44.6 17.4
Weight
100 … 140
100 … 1401)
120 … 160
115 … 1651)
180 … 260
200 … 2701)
190 … 260
200 … 2801)
L2
49.5 4.9
Standard flow rate qn
at 6 > 0 bar
in direction of
in non-return
flow control
direction
[l/min]
[l/min]
130
L1
15
Ordering data – Exhaust air one-way flow control function
Pneumatic
Standard nominal flow rate qnN
connection
at 6 > 5 bar
in direction of
in non-return
flow control
direction
2
1
[l/min]
[l/min]
QS-4
L
Part No.
Type
28.2
525667
GRXA-HG-x-QS-4
28.2
525668
GRXA-HG-x-QS-6
58.8
525669
GRXA-HG-¼-QS-6
58.8
525670
GRXA-HG-¼-QS-8
[g]
Unactuated
è Internet: www.festo.com/catalogue/...
Subject to change – 2015/12