Festo

FESTO MS Series Regulators

Festo's "One MS worldwide" offers a wide range of pressure regulators. From standard integrated reverse flow function and secondary exhausting to high flow rate performance and very good control characteristics – the MS series offers the right product for every application. It is available in four sizes, with mechanical pressure gauge or alternatively with pressure sensor with and without display. In addition, all pressure regulators of the MS series can be installed modularly in service unit combinations according to the simple modular system of the MS series. Optionally, the pressure regulators can also be configured for use in Zone 1, 2, 21 and 22 potentially explosive areas and with UL approval.

Part Number
Model Code
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Series
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Port Size
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Adjustment
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Precision
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Thread Type
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Description
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531422
MS4N-LR-1/4-D6-AS
MS4N
1/4
D6
Standard
AS
Pressure regulator
531424
MS4N-LR-1/4-D6-AS-Z
MS4N
1/4
D6
Standard
AS-Z
Pressure regulator
531426
MS4N-LR-1/4-D7-AS
MS4N
1/4
D6
Standard
AS
Pressure regulator
531443
MS6N-LR-1/2-D5-AS
MS6N
1/2
D5
Standard
AS
Pressure regulator
531444
MS6N-LR-3/8-D5-AS
MS6N
3/8
D5
Standard
AS
Pressure regulator
531448
MS6N-LR-1/4-D6-AS
MS6N
1/4
D6
Standard
AS
Pressure regulator
531450
MS6N-LR-3/8-D6-AS
MS6N
3/8
D6
Standard
AS
Pressure regulator
531454
MS6N-LR-1/4-D7-AS
MS6N
1/4
D7
Standard
AS
Pressure regulator
531455
MS6N-LR-1/2-D7-AS
MS6N
1/2
D7
Standard
AS
Pressure regulator
531456
MS6N-LR-3/8-D7-AS
MS6N
3/8
D7
Standard
AS
Pressure regulator
527690
MS4-LR-1/4-D5-PSI-AS-WR
MS4
1/4
D5
Standard
AS-WR
Pressure regulator
538028
MS6-LRP-1/2-PO-A8M
MS6
1/2
PO
Precision
PO-A8M
FESTO Precision Regulator
562530
MS9-LR-AQV-PO-AG-PSI
MS9
AQV
PO
Precision
PO-AG-PSI
Pressure regulator
Part Number
Model Number
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Thread Size
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Pressure Range (bar)
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Flow Rate (l/min)
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Operating Pressure (bar)
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Temperature Range (°C)
Material
Notes
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530322
MS6-LRB-1/2-D5-AS
G 1/2
0.5–4
5500
0.8–20
-10 to +60
Die-cast aluminum, PA, POM
Lockable rotary knob, with gauge
530328
MS6-LRB-1/2-D6-AS
G 1/2
0.5–6
5500
0.8–20
-10 to +60
Die-cast aluminum, PA, POM
Lockable rotary knob, with gauge
530334
MS6-LRB-1/2-D7-AS
G 1/2
0.5–12
5500
0.8–20
-10 to +60
Die-cast aluminum, PA, POM
Lockable rotary knob, with gauge
529473
MS4-LRB-1/4-D5-AS
G 1/4
0.3–4
1900
0.8–14
-10 to +60
Die-cast aluminum, PA, POM
Lockable rotary knob, with gauge
527692
MS4-LRB-1/4-D5
G 1/4
0.3–4
1900
0.8–14
-10 to +60
Die-cast aluminum, PA, POM
Without gauge
529480
MS4-LRB-1/4-D6-AS-BD
G 1/4
0.5–6
1900
0.8–14
-10 to +60
Die-cast aluminum, PA, POM
Lockable rotary knob, with gauge
536701
MS4N-LRB-1/8-D6-AS
G 1/8
0.5–6
1500
0.8–14
-10 to +60
Die-cast aluminum, PA, POM
Manual drain, compact design
536705
MS6N-LRB-1/2-D6-AS
G 1/2
0.5–6
4800
0.8–20
-10 to +60
Die-cast aluminum, PA, POM
Manual drain, higher flow capacity
Part Number
Model Number
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Thread Size
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Pressure Regulation Range (bar)
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Flow Rate (l/min)
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Operating Pressure (bar)
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Temperature Range (°C)
Material
538024
MS6-LRP-1/2-D5-A8
G 1/2
0.1–4
4,000
0.5–12
-10 to +60
Die-cast aluminum, PA, POM
538018
MS6-LRP-3/8-D7-A8
G 3/8
0.5–12
4,500
0.5–16
-10 to +60
Die-cast aluminum, PA, POM
538023
MS6-LRP-1/2-D4-A8-Z
G 1/2
0.05–2.5
3,800
0.5–12
-10 to +60
Die-cast aluminum, PA, POM
538022
MS6-LRP-1/2-D4-A8
G 1/2
0.05–2.5
3,800
0.5–12
-10 to +60
Die-cast aluminum, PA, POM
538026
MS6-LRP-1/2-D7-A8
G 1/2
0.5–12
4,500
0.5–16
-10 to +60
Die-cast aluminum, PA, POM
538044
MS6N-LRP-3/8-D7-A8-Z
NPT 3/8
0.5–12
4,500
0.5–16
-10 to +60
Die-cast aluminum, PA, POM
Part Number
Thread Size
Pressure Range (bar)
OKCancelClear All
Flow Rate (l/min)
Operating Pressure (bar)
Temperature Range (°C)
Material
JHF Store URL
OKCancelClear All
MS6-LRPB-1/2-D6-A8
G 1/2
0.5–6
4300
0.8–12
-10 to +60
Die-cast aluminum, PA, POM
https://store.jhf.com/538100
MS6-LRPB-1/2-D7-A8
G 1/2
0.5–12
4300
0.8–12
-10 to +60
Die-cast aluminum, PA, POM
https://store.jhf.com/538104
MS6-LRPB-1/2-D5-A8
G 1/2
0.5–4
4300
0.8–12
-10 to +60
Die-cast aluminum, PA, POM
https://store.jhf.com/538098
MS6-LRPB-1/2-D6-A8-Z
G 1/2
0.5–6
4300
0.8–12
-10 to +60
Die-cast aluminum, PA, POM
https://store.jhf.com/538102

🛠️ Model Selector Guide
Model
 Port Sizes Regulation Range (bar) Adjustability Gauge Option Mounting Style Series Compatibility
MS4-LR G 1/8 to G 1/4 0.5–12 Lockable rotary knob Yes/No In-line or modular MS4
MS6-LR G 3/8 to G 1/2 0.5–12 Lockable rotary knob Yes/No In-line or modular MS6
MS4-LRB G 1/4 0.3–6 Lockable knob Yes/No For manifold installation MS4
MS6-LRB G 1/2 0.3–12 Lockable knob Yes/No For manifold installation MS6
MS4N-LRB G 1/8 0.5–6 Compact design Yes/No Narrow-body, modular MS4N
MS6N-LRB G 1/2 0.5–6 Compact, high-flow Yes/No Narrow-body, modular MS6N
MS6-LRP G 3/8 to G 1/2 0.05–12 Fine-adjustment screw Optional Modular MS6
MS6-LRPB G 1/2 0.5–12 Fine-adjustment screw Optional Modular MS6