Pressure and differential pressure regulators
Subject to change – 2013/04
2
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Pressure and differential pressure regulators
Features
LRMA-…-QS
LRL-…-QS
LR-…-QS
LRLL-…-QS
Pressure regulators LR, LRMA
-M- Flow rate
22 ... 127 l/min
• With threaded and push-in
connector
• Screw-in thread
M5, Rx,R¼
• Push-in connector
for tubing O.D. 4 ... 8 mm
• Push-in connector, can be rotated
360°
The pressure regulator maintains an
essentially constant output pressure
on the secondary side independent of
pressure fluctuations on the primary
side and air consumption.
The primary pressure at the screw-in
thread is reduced when air is
exhausted from the QS pu sh-in
connector.
Differential pressure regulators LRL, LRLL
-M- Flow rate
30 ... 760 l/min
• With threaded and push-in
connector
• Screw-in thread
M5, Rx,R¼,Ry,R½
• Push-in connector
for tubing O.D. 4 ... 12 mm
• Push-in connector, can be rotated
360°
The differential pressure regulator
maintains a manually adjusted
differential pressure between the
primary pressure at the screw-in
thread and the output pressure at the
QS push-in connector.
Pressure applied at the QS push-in
connector can be exhausted with no
change in pressure at the thread
connection end thanks to an
integrated non-return valve.
-H- Note
The differential pressure regulator
has no exhaust, i.e. increasing
secondary pressure cannot be
reduced.
2013/04 – Subject to change
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Pressure and differential pressure regulators
Produ ct range overview
Function Design Type Pneumatic connection Page/Internet
Thread For tubing O.D. [mm]
4 6 8 10 12
Pressure regulating
valve without pressure
gauge
With QS push-in connector and screw-in thread
LR-…-QS-… M5
– – –
5
Rx
– –
R¼
– – –
With QS push-in connector at both ends
LR-QS-… –
– –
5
Pressure regulator
with pressure gauge
With QS push-in connector and screw-in thread
LRMA-…-QS-… M5
– – –
9
Rx
– –
R¼
– – –
With QS push-in connector at both ends
LRMA-QS-… –
– –
9
Differential pressure
regulator
without pressure gauge
With QS push-in connector at top and screw-in thread
LRL-…-QS-…
M5 – – –
12
Rx – –
R¼ – –
Ry – –
R½ – – – –
With QS push-in connector on side and screw-in thread
LRLL-…-QS-…
M5 – – –
12
Rx – –
R¼ – –
Ry – –
R½ – – – –
1) Tubing www.festo.com
Subject to change – 2013/04
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Pressure and differential pressure regulators
Type codes
LRLL
— y — QS-8
Type
Pressure regulator
LR Without pressure gauge
LRMA With pressure gauge
Differential pressure regulator
LRL Outlet on top
LRLL Outlet on the side
Screw-in thread
M5 Metric thread M5
x Pipe thread Rx
¼ Pipe thread R¼
y Pipe thread Ry
½ Pipe thread R½
Tubing connection
Type of connecti on
QS Push-in connector for standard O.D. tubing
For tubing O.D.
4 4mm
6 6mm
8 8mm
10 10 mm
12 12 mm
2013/04 – Subject to change
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Pressure regulators LR
Technical data
Functi on
-M- Flow rate
22 … 127 l/min
• Minimal dimensions
• Constant output pressure
• Version without pressure gauge
• Screw-in thread M5 … R¼ or
push-in connector ∅ 4…8mm
LR-…-QS-…LR-QS-…
General technical data
Design Directly actuated piston regulator with through pressure supply
Regulating functi on With secondary venting, output pressure constant
Actuator lock Knurled screw with l ock nut
Mounting position Any
With QS push-in connector and metric thread with sealing ring
Type of mounting Can be screwed in
Material s Housing Polybutylene terephthalate
Threaded plug Nickel plated brass
With QS push-in connector and PTFE-coated pipe thread
Type of mounting Can be screwed in
Material s Housing Polybutylene terephthalate
Threaded plug Nickel plated brass
Threaded seal Polytetrafluoroethylene
With QS push-in connector at both ends
Type of mounting Via through-holes
Material s Housing Polybutylene terephthalate
Operating and environmental conditions
Operating medium Compressed air in accordance with ISO 8573-1:2010 [7:–:–]
Input pressure [bar] 0…9
Pressure regulation range [bar] 1…8
Ambient temperature [°C] 0…60
Subject to change – 2013/04
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Pressure regulators LR
Technical data
Weights [g]
Screw-in thread M5 Rx R¼
With QS push-in connector and metric thread with sealing ring
QS-4 16 – –
QS-6 16 – –
With QS push-in connector and PTFE-coated pipe thread
QS-4 – 32.5 –
QS-6 – 33.5 54
QS-8 – 35 55
Weights [g]
With QS pus h-in connector at both ends
QS-4 33
QS-6 33
QS-8 56
Standard nominal flow rate [l/min]
Screw-in thread M5 Rx R¼
With QS push-in connector and metric thread with sealing ring
QS-4 22 – –
QS-6 41 – –
With QS push-in connector and PTFE-coated pipe thread
QS-4 – 46 –
QS-6 – 63 98
QS-8 – 69 101
Standard nominal flow rate [l/min]
With QS pus h-in connector at both ends
QS-4 67
QS-6 70
QS-8 127
2013/04 – Subject to change
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Pressure regulators LR
Technical data
Dimensions Download CAD data www.festo.com
With QS push-in connector and screw-i n thread M5 With QS push-in connector and screw-i n thread Rx,R¼
= Flow direction
Screw-in thread
D1
D2
∅
D3
∅
D5
∅
D6
∅
H1 H2 H3 H4 L1 ß
min. max. min. max.
M5 4 9.8 8 10 44.6 48.75 2.9 7.6 41.7 45.8 16 10
6 9.8 10.5 10 44.6 48.7 2.9 8.4 41.7 45.8 17.8 10
Rx 4 14.4 10 14 56 60 7.8 10.5 52 56 21.4 14
6 14.4 12.4 14 56 60 7.8 10.7 52 56 23.5 14
8 14.4 14.4 14 56 60 7.8 11.7 52 56 26.9 14
R¼ 6 18.4 12.4 17 60.8 64.8 11.3 12.2 54.8 58.8 25.5 17
8 18.4 14.4 17 60.8 64.8 11.3 13.2 54.8 58.8 28.4 17
Subject to change – 2013/04
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Pressure regulators LR
Technical data
Dimensions Download CAD data www.festo.com
With QS pus h-in connector at both ends
= Flow direction
Push-in
connector
B B1 B2 D1 D2 D3 H H1 H2 H3 H4 H5 L L1 L2 L3
∅ ∅ ∅ min. max.
QS-4
15 9 1
4
3.2 15 59 63 17 19 25 4 9
44 22
20 30
QS-6 6 45 22.5
QS-8 19 13 1 8 3.2 19 63.5 67.5 21 21 29 4 9 57 28.5 23 39
Ordering data
Description Screw-in
thread
For tubing O.D. Part No. Type
[mm]
With QS push-in connector and metric thread with sealing ring M5 4 153532 LR-M5-QS-4
6 153533 LR-M5-QS-6
With QS push-in connector and PTFE-coated pipe thread Rx 4 153534 LR-x-QS-4
6 153535 LR-x-QS-6
8 153536 LR-x-QS-8
R¼ 6 153537 LR-¼-QS-6
8 153538 LR-¼-QS-8
With QS push-in connector at both ends – 4 153540 LR-QS-4
6 153541 LR-QS-6
8 153542 LR-QS-8
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Pressure regulators LRMA, with pressure gauge
Technical data
Functi on
-M- Flow rate
36 … 124 l/min
• Minimal dimensions
• Constant output pressure
• Version with pressure gauge
• Screw-in thread M5 … R¼ or
push-in connector ∅ 4…8mm
LRMA-…-QS-… LRMA-QS-…
General technical data
Design Directly actuated piston regulator with through pressure supply
Regulating functi on With secondary venting, output pressure constant
Actuator lock Knurled screw with l ock nut
Mounting position Any
With QS push-in connector and metric thread with sealing ring
Type of mounting Can be screwed in
Material s Housing Polybutylene terephthalate
Threaded plug Nickel plated brass
With QS push-in connector and PTFE-coated pipe thread
Type of mounting Can be screwed in
Material s Housing Polybutylene terephthalate
Threaded plug Nickel plated brass
Threaded seal Polytetrafluoroethylene
With QS push-in connector at both ends
Type of mounting Via through-holes
Material s Housing Polybutylene terephthalate
Operating and environmental conditions
Operating medium Compressed air in accordance with ISO 8573-1:2010 [7:–:–]
Input pressure [bar] 0…9
Pressure regulation range [bar] 1…8
Ambient temperature [°C] 0…60
Weights [g]
Screw-in thread M5 Rx R¼
With QS push-in connector and metric thread with sealing ring
QS-4 28 – –
QS-6 28 – –
With QS push-in connector and PTFE-coated pipe thread
QS-4 – 54.5 –
QS-6 – 54.5 55
QS-8 – 83.5 83.5
Weights [g]
With QS push-in connector at both ends
QS-4 45
QS-6 45
QS-8 68
Subject to change – 2013/04
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Pressure regulators LRMA, with pressure gauge
Technical data
Standard nominal flow rate [l/min]
Screw-in thread M5 Rx R¼
With QS push-in connector and metric thread with sealing ring
QS-4 36 – –
QS-6 42 – –
With QS push-in connector and PTFE-coated pipe thread
QS-4 – 60 –
QS-6 – 75 96
QS-8 – 87 97
Standard nominal flow rate [l/min]
With QS pus h-in connector at both ends
QS-4 50
QS-6 76
QS-8 124
Dimensions Download CAD data www.festo.com
With QS push-in connector and screw-i n thread M5 With QS push-in connector and screw-i n thread Rx,R¼
1 Pressure gauge = Flow direction
Screw-in thread
D1
D2
∅
B1 D5
∅
D6
∅
H1 H2 H3 H4 H5 L1 L2 ß
min. max. min. max.
M5 4 15.1 9.8 11 57.1 61.2 3.5 11.8 53.6 57.7 42.8 28 1.1 8
6 15.1 11.8 11 57.1 61.2 3.5 11.8 53.6 57.7 42.8 28.1 1.1 8
Rx 4 15.1 10 15 77.5 81.5 8 18.5 – – 51.5 36 0.5 12
6 15.1 12 15 77.5 81.5 8 18.5 – – 51.5 36.5 0.5 12
8 15 14 15 77.5 81.5 8 18.5 – – 51.5 36.5 1 12
R¼ 6 19 12 19 85.5 89.5 11 22.5 – – 57 39.5 0.5 16
8 19 14 19 85.5 89.5 11 22.5 – – 57 39.5 1 16
2013/04 – Subject to change
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Pressure regulators LRMA, with pressure gauge
Technical data
Dimensions Download CAD data www.festo.com
With QS push-in connector at both ends
1 Pressure gauge
= Flow direction
Push-in
connector
Connecti on
D1
B1 B2 B3 D2 D3 D4 H1 H2 H3 H4
∅ ∅ ∅ ∅ min. max.
QS-4 4
15 9 1 15 15 3.2 59 63 17 19 25
QS-6 6
QS-8 8 19 13 1 19 15 3.2 63.5 67.5 21 21 29
Push-in
connector
H5 H6 L1 L2 L3 L4 L5 L6 L7 L8 T1 ß 1
QS-4
9 4 49.5 22.4 10 10 15 10 30 12
11.5
14
QS-6
12
QS-8 9 4 59.7 28.5 11.5 9 19.6 11.5 39 17 18.5 14
Ordering data
Description Screw-in
thread
For tubing O.D. Part No. Type
[mm]
With QS push-in connector and metric thread with sealing ring M5 4 153488 LRMA-M5-QS-4
6 153490 LRMA-M5-QS-6
With QS push-in connector and PTFE-coated pipe thread Rx 4 153489 LRMA-x-QS-4
6 153491 LRMA-x-QS-6
8 153493 LRMA-x-QS-8
R¼ 6 153492 LRMA-¼-QS-6
8 153494 LRMA-¼-QS-8
With QS push-in connector at both ends – 4 153495 LRMA-QS-4
6 153496 LRMA-QS-6
8 153497 LRMA-QS-8
Subject to change – 2013/04
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Differential pressure regulators LRL/LRLL
Technical data
Functi on
-M- Flow rate
30 … 760 l/min
• Minimal dimensions
• Constant differential pressure
between the input and output
• With screw-in thread M5 … R½ or
push-in connector ∅ 4…12mm
LRL-…-QS-… LRLL-…-QS-…
General technical data
Pneumatic connection 1 M5 Rx R¼ Ry R½
Pneumatic connection 2 QS-4, QS-6 QS-4, QS-6, QS-8 QS-6, QS-8, QS-10 QS-8,QS-10,QS-12 QS-12
Design Directly actuated piston regulator with through pressure supply
Regulating functi on With return flow, differential pressure constant
Type of mounting Can be screwed in
Mounting position Any
Actuator lock Knurled screw with l ock nut
Pressure regulation range [bar] 2…6
Operating and envir onmental conditions
Input pressure [bar] 0…9
Operating medium Compressed air in accordance with ISO 8573-1:2010 [7:–:–]
Note on operating/pilot medium Operation with lubricated medium possible (in whi ch case lubricated operation will always be required)
Ambient temperature [°C] 0…+60
Standard nominal flow rate [l/min]
Screw-in thread M5 Rx R¼ Ry R½
open closed open cl osed open closed open closed open closed
LRL, outlet on top
QS-4 30 30 96 93 – – – – – –
QS-6 30 30 115 115 241 240 – – – –
QS-8 – – 120 115 224 224 463 393 – –
QS-10 – – – – 231 231 476 423 – –
QS-12 – – – – – – 438 379 760 730
LRLL, outlet on the side
QS-4 30 30 100 96 – – – – – –
QS-6 32 31 155 140 267 266 – – – –
QS-8 – – 115 110 268 264 474 340 – –
QS-10 – – – – 269 262 456 411 – –
QS-12 – – – – – – 518 423 730 700
Materials
Housing Reinforced PBT
Threaded plug Nickel plated brass
Threaded seal PTFE
Note on materials RoHS-compliant
2013/04 – Subject to change
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Differential pressure regulators LRL/LRLL
Technical data
Dimensions – LRL, outlet on top Download CAD data www.festo.com
With screw-in thread M5 With screw-in thread Rx,R¼,Ry,R½
= Flow direction with pressure
reducti on
-H- Note
Pressure applied at the QS push-in
connector D2 can be exhausted with
no change in pressure at the thread
connection end D1 thanks to an
integrated non-return valve.
Screw-in thread
D1
D2
∅
D3
∅
D5
∅
H1 H2 H3 H4 H5 L1 ß
min. max. min. max.
M5 4 9.8 10.2 35.2 38.3 2.9 6.7 32.3 35.4 23.9 10.5 8
6 9.8 12.6 35.2 38.3 2.9 6.7 32.3 35.4 26 12.2 8
Rx 4 14.4 10.2 43.7 48.2 8 10.9 39.7 44.2 28.9 13 10
6 14.4 12.6 43.7 48.2 8 10.9 39.7 44.2 31 14.2 10
8 14.4 14.6 43.7 48.2 8 10.9 39.7 44.2 32.4 15.3 10
R¼ 6 18.4 12.6 47.8 52.3 11.1 12 41.8 46.2 32.1 17.2 14
8 18.4 14.6 47.8 52.3 11.1 12 41.8 46.2 33.6 18.2 14
10 18.4 17.8 47.8 52.3 11.1 12 41.8 46.2 35.9 19.8 14
Ry 8 22 14.6 54.5 59 13.2 15.4 48.2 52.6 37.8 19.2 19
10 22 17.8 54.5 59 13.2 15.4 48.2 52.6 40.1 20.2 19
12 22 21.2 54.5 59 13.2 15.4 48.2 52.6 42.8 23.4 24
R½ 12 28 21.2 59.8 64.3 16 18.2 51.6 56.1 47 23.4 24
Subject to change – 2013/04
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Differential pressure regulators LRL/LRLL
Technical data
Dimensions – LRLL, outlet on side Download CAD data www.festo.com
With screw-in thread M5 With screw-in thread Rx,R¼,Ry,R½
= Flow direction with pressure
reducti on
-H- Note
Pressure applied at the QS push-in
connector D2 can be exhausted with
no change in pressure at the thread
connection end D1 thanks to an
integrated non-return valve.
Screw-in thread
D1
D2
∅
D5
∅
H1 H2 H3 H4 L1 ß
min. max. min. max.
M5 4 9.9 35.7 38.8 3.4 7.1 32.3 35.4 19.9 8
6 12.4 35.7 38.8 3.4 8.3 32.3 35.4 24 8
Rx 4 10 44.5 48.5 8 9.5 40.5 44.5 21.5 10
6 12.5 44.5 48.5 8 10.5 40.5 44.5 23.5 10
8 14.5 44.5 48.5 8 11.5 40.5 44.5 27 10
R¼ 6 12.5 48.5 52 11.5 12 42.5 46 25.5 14
8 14.5 48.5 52 11.5 13 42.5 46 28.5 14
10 17.5 48.5 52 18.5 15 42.5 46 31 14
Ry 8 14.5 56 59 13 15 49.5 52.5 29 19
10 17.5 56 59 13 16.5 49.5 52.5 31 19
12 21 56 59 13 18 49.5 52.5 37 24
R½ 12 21 62 64.5 16 19.5 54 56.5 36.5 24
2013/04 – Subject to change
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Differential pressure regulators LRL/LRLL
Technical data
Ordering data
Pneumatic connection Weight Part No. Type
1 2 [g]
Outlet on top
M5 QS-4 9.5 153510 LRL-M5-QS-4
QS-6 11 153512 LRL-M5-QS-6
Rx QS-4 21 153511 LRL-x-QS-4
QS-6 22 153513 LRL-x-QS-6
QS-8 23 153515 LRL-x-QS-8
R¼ QS-6 38 153514 LRL-¼-QS-6
QS-8 39 153516 LRL-¼-QS-8
QS-10 43 153518 LRL-¼-QS-10
Ry QS-8 70 153517 LRL-y-QS-8
QS-10 74 153519 LRL-y-QS-10
QS-12 78 153520 LRL-y-QS-12
R½ QS-12 110 153521 LRL-½-QS-12
Outlet on the side
M5 QS-4 9 153498 LRLL-M5-QS-4
QS-6 10 153500 LRLL-M5-QS-6
Rx QS-4 19 153499 LRLL-x-QS-4
QS-6 20 153501 LRLL-x-QS-6
QS-8 22 153503 LRLL-x-QS-8
R¼ QS-6 37 153502 LRLL-¼-QS-6
QS-8 38 153504 LRLL-¼-QS-8
QS-10 42 153506 LRLL-¼-QS-10
Ry QS-8 67 153505 LRLL-y-QS-8
QS-10 69 153507 LRLL-y-QS-10
QS-12 73 153508 LRLL-y-QS-12
R½ QS-12 105 153509 LRLL-½-QS-12
