Name: MS4-LFR-1-4-D7-CRM-AS Festo Filter regulator - INOSAKI
SKU: Festo-529152
Price: 56.75 USD
Availability: InStock

Technical Overview

The Festo MS4-LFR-1/4-D7-CRM-AS is a professional-grade filter regulator from the MS series, engineered for precise compressed air preparation. It features a fine 5 µm grade of filtration and a pressure regulation range of 0.5 bar to 12 bar. The unit includes an integrated analog pressure gauge, a manually rotating condensate drain, and a plastic bowl guard. Designed for vertical mounting, it offers constant output pressure with secondary venting and a return flow function, making it ideal for maintaining high air purity and stable pressure in industrial pneumatic systems.

Key Features

Integrated analog pressure gauge
5 µm grade of filtration for high air purity
Manual rotating condensate drain
Rotary knob actuator lock with detent (can be closed with accessories)
Output pressure constant with secondary venting and return flow function
High flow rate performance up to 1200 l/min
Robust die-cast aluminium housing
RoHS-compliant materials

Technical Specification Matrix

Parameter	Value
Size	4
Series	MS
Actuator lock	Rotary knob with detent can be closed with accessories
Mounting position	Vertical +/-5°
Grade of filtration	5 µm
Condensate drain	Manually rotating
Design	Filter regulator with pressure gauge
Max. condensate volume	19 ml
Controller function	Output pressure constant With secondary venting With return flow function
Bowl guard	Plastic bowl guard
Degree of condensate separation	>75 %
Symbol	00991589
Pressure gauge (ANALOG) or Pressure display (DIGITAL)	With pressure gauge
Operating pressure (MPa)	0.08 MPa ... 1.4 MPa
Operating pressure (bar)	0.8 bar ... 14 bar
Pressure regulation range	0.5 bar ... 12 bar
Max. pressure hysteresis	0.25 bar
Standard nominal flow rate	1200 l/min
Operating medium	Inert gases
Corrosion resistance class CRC	2 - Moderate corrosion stress
LABS (PWIS) conformity	VDMA24364-B1/B2-L
Storage temperature	-10 °C ... 60 °C
Suitable for use with food	See supplementary material information
Air purity class at output	Compressed air to ISO 8573-1:2010 [6:4:4]
Media temperature	-10 °C ... 60 °C
Ambient temperature	-10 °C ... 60 °C
Pore size	<5 µm
Product weight	275 g
Type of mounting	With accessories
Pneumatic connection, port 1	G1/4
Pneumatic connection, port 2	G1/4
Note on materials	RoHS-compliant
Material sub-base	Die-cast aluminium
Material control panel	PA POM
Material seals	NBR
Material filter	PE
Material housing	Die-cast aluminium
Material membrane	NBR
Material bowl	PC
Material separating plate	POM

Industrial Applications

1. Safety-Critical Pneumatic Control Panels

Integration into the main air entry assembly of automated manufacturing cells, specifically where upstream safety dump valves are employed to cut off and exhaust air during Emergency Stop (E-Stop) conditions.

Problem Solved

Standard regulators often act as check valves, trapping dangerous compressed air downstream even after the main supply is dumped. The MS4-LFR's integrated 'return flow function' allows air to exhaust backwards from the output to the input side, ensuring the entire pneumatic circuit depressurizes rapidly and safely without requiring additional bypass check valves.

Return flow functionSafety exhaustReverse flowEmergency stopG1/4 pneumatic connection

2. Force-Sensitive Clamping in CNC Machining Fixtures

Regulation of clamping pressure for holding delicate or variable-geometry workpieces in CNC milling centers, where vibration or physical displacement might cause pressure spikes.

Problem Solved

During machining, external forces can push back against pneumatic clamps, causing pressure spikes that might damage the workpiece. The 'secondary venting' feature of the MS4-LFR automatically exhausts this excess over-pressure to maintain a constant clamping force (hysteresis < 0.25 bar), while the 5 µm filter protects the precision proportional valves downstream from metal dust and coolant mist.

Secondary ventingPressure hysteresisConstant output pressure5 µm filtrationCRC 2 corrosion resistance

3. Food & Beverage Vertical Form Fill Seal (VFFS) Machines

Air preparation unit for the pneumatic actuators driving the sealing jaws and film feed mechanisms in packaging lines, located in 'splash zones' or washdown-adjacent areas.

Problem Solved

Packaging machinery requires compliance with hygiene standards and stable pressure for consistent heat sealing. This unit's specific materials are 'suitable for use with food' (per supplementary specs) and the 5 µm filtration ensures the air complies with ISO 8573-1:2010 [6:4:4], preventing contamination of the food packaging zone while the manual drain allows controlled condensate removal during cleaning shifts.

ISO 8573-1:2010 [6:4:4]Food industry suitabilityPlastic bowl guard1200 l/min flow rateManual condensate drain