Compressed air quality ensures good quality food! - Festo

Compressed air quality 

ensures good quality food! 

Systematically modular: MS series 

The quick and clean way 

for safe food production: 

Service unit combinations 

ex stock, consisting of 

MS-series modules

MS or D-series: 

This depends on the task in hand! 

Systematically more modular – 

the MS-series 

Consistent modularity and a 

winning design put the MS-series 

in a class of its own. Combined 

with a wealth of functionalities 

and air qualities, the only thing 

for you to define is the desired 

compressed air quality. 

Modularity; individualisation 

➔ 

New: 

MS-series 

D-series 

➔ 

Sturdy design; 

standardisation 

However, Festo offers far more 

than just quality components. 

Festo means all-round support 

with Industrial Services. 

For example, for all those users 

who cannot find a suitable 

combination here because their 

requirements are too specific: 

the configurator in our electronic 

catalogue: 

http://www.festo.com/catalogue 

Different systems require 

different compressed air 

qualities and flow rates. 

Special functions and a designoptimised 

environment are the 

ideal application area for the 

MS-series. Flow values of 700 

to 5100 l/min meet virtually 

any challenge.

Why the need for compressed air preparation? 

Air is not always as clean as it 

appears to be! Particularly when 

used in the food and packaging 

industry, a further important 

point needs to be considered 

since, as part of an HACCP audit, 

compressed air also comes under 

the scrutinity of the certificating 

authority! 

Air humidity and condensation: 

The maximum water absorption 

capacity of air greatly depends 

on temperature, irrespective of 

pressure. The volume of air 

absorbed is specified in g per m3 . 

With increasing temperature, 

the quantity of water absorbed 

increases. Conversely, large 

quantities of water are released 

if the temperature cools down. 

This leads to corrosion and 

damage in the compressed air 

system and on the components 

connected. The use of compressed 

air dryers eliminates such 

problems from the outset. In 

addition to this, the use of a 

compressed air dryer is recommended 

for the processing of 

dried food. 

Oil contamination: 

Even if oil-free compressors are 

used, oil particles are drawn in 

from the ambient air. Since this 

oil is generally not specifically 

intended for the lubrication of 

pneumatic components, there 

is a risk of damage to delicate 

components and in a worst case 

scenario the contamination of 

food. 

Dirt and rust particles: 

Solid particles occur in the form 

of dust (carbon, rust particles ) 

and are present at build-up 

points. Coastal areas are 

generally less dusty, but instead 

are subject to salt particles from 

evaporated sea water droplets. 

Dust is divided into the following 

categories: 

Coarse dust (> 10 ìm), 

fine dust (1 – 10 ìm) 

and superfine dust (< 1 ìm).

Compressed air qualities in the food 

and packaging industry 

A simple rule of thumb applies 

for the definition of compressed 

air quality in the food and packaging 

industry: 

The compressed air must 

be so clean as to damage neither 

the product or in the worst case 

scenario, the consumer. 

Compressed air qualities to DIN ISO 8573-1: 

Compressed air quality is 

generally categorised into the 

following quality classes in 

accordance with DIN ISO 8573-1: 

1. Quality class of solid 

contamination 

2. Quality class for water content 

3. Quality class for overall 

oil content 

Class Residual dust Residual water Residual oil 

µm mg/m3 DTP g/m3 mg/m3 1 0.1 0.1 – 70 0.003 0.01 

2 1 1 – 40 0.12 0.1 

3 5 5 – 20 0.88 1 

4 15 8 + 3 6.0 5 

5 40 10 + 7 7.8 25 

6 – – + 10 9.4 – 

7 – – not not – 

specified specified 

This recommendation applies to all air compressors, regardless of compression 

method or mechanical design. 

The following applications have 

particularly high requirements 

regarding compressed air in the 

food and packaging industry: 

“Non dried foods” 

Compressed air comes into 

direct contact with “non dried 

foods” (e.g. drinks, meat, 

vegetables etc.) 

Compressed air is used for 

transporting, mixing or for the 

production of food in general 

and is therefore in direct contact 

with food. 

“Packaging machines” 

Compressed air comes into 

direct contact with packaging 

materials which are subsequently 

filled with food. The packaging 

material therefore becomes part 

of the food zone. 

For both instances the following 

classification applies for 

compressed air quality in 

accordance with DIN ISO 8573-1: 

Dust: Class 1 

Water: Class 4 

Oil: Class 1

“Dried foods” 

Compressed air comes into direct 

contact with dried foods 

Compressed air is used for the 

transporting, mixing or for the 

production of food in general 

and therefore comes into direct 

contact with foodstuffs. However, 

in this case even more stringent 

requirements apply since air 

humidity plays a major role! 

For such applications the 

following classifications in 

accordance with DIN ISO 8573-1 

should be considered: 

Dust: Class 1 


Oil: Class 1 

Maximum possible safety 

Compliance with the compressed 

air qualities listed here is 

imperative in order to ensure 

the maximum possible safety of 

food and to protect the health of 

the consumer – true to the motto 

of food producers: “Protecting 

the brand!” 

Examples of predefined service units ex stock 

If compressed air quality 1.2.1 

is required, we recommend the 

use of compressed air quality 

1.4.1 generated with the aid of 

one of the combinations of 

devices described here, using 

the Festo adsorption dryer 

type LDF for drying. The dryer 

should be interconnected downstream 

of the filter regulator LFR 

or branching module FRM and 

upstream of the microfilters. 

A typical service unit combination 


“non dried” foodstuffs: 

LFR FRM LFM LFM 

LFR: Filter regulating valve 

5 µm grade of filtration 

FRM: Branching module 

Branching option for standard 

compressed air 

LFM: Microfilter (fine filter) 


LFM: Microfilter (finest filter) 

0.01 µm grade of filtration 

Classification in accordance 

with ISO 8573-1: 

Dust: Class 1 


Oil: Class 1

A typical service unit combination 


dried foodstuffs: 

LFR FRM LFM 

LDF 

LFM FRM LFX 

LFR: Filter regulating valve 



Branching option for standard 

compressed air 

LFM: Microfilter (fine filter) 


LDF: Adsorption dryer 

(with integrated microfilter 

0.01 µm at input and microfilter 

1 µm at output) 

LFM: Microfilter (finest filter) 



Branching option: compressed 

air for applications with 

demanded compressed air 

quality 1.2.1 

LFX: Active carbon filter 

Odourless 

Classification in accordance 

with ISO 8573-1: 

Dust: Class 1 


Oil: Class 1 

MS4 

Assortment of service units combinations 

for the food industry: MS4 

Compressed air quality: 1.4.1 – Smallest combination 

for decentralised compressed air preparation 

Connection size: G 1 /4 

Mounting type: Wall mounting WP 

Position 1: LFR: Filter regulator valve 

Pressure range of 0.5 to 12 bar 


Position 2: LFM-B: Microfilter 


Position 3: LFM-A: Microfilter 


Flow rate: qnN ~ 100 l/min [∆p = 70 mbar] 

qmax = 360 l/min 

Part No.: 531029 

Order code: MSB4-1/4:J4:I1:I3-WP

MS4 

Compressed air quality: 1.4.1 – Branching option 

for standard compressed air and manual on/off valve 



Position 1: EM: Manual on/off valve 

Position 2: LFR: Filter regulating valve 

Pressure range 0.5 to 12 bar 


Position 3: FRM: Branching module 







Flow rate downstream of branching module: 

qnN ~ 1100 l/min [∆p = 1 bar] 

Part No.: 531029 

Order code: MSB4-1/4:C1:J4:F1:I1:I3-WP 

MS4 


for standard compressed air and electrical on/off valve 



Position 1: EE: Electrical on/off valve, 24 V DC 












qnN ~ 1100 l/min [∆p = 1 bar] 

Part No.: 531029 

Order code: MSB4-1/4:D1:J4:F1:I1:I3-WP

MS4 

Compressed air quality: 1.4.1 – Odourless 










Position 4: LFX: Active carbon filter 



Part No.: 531029 

Order code: MSB4-1/4:J4:I1:I3:L1-WP 

MS4 


with manual on/off valve 














Part No.: 531029 

Order code: MSB4-1/4:C1:J4:I1:I3:L1-WP

MS4 


with electrical on/off valve 



Position 1: EE: Electrical on/off valve, 24 V DC 






Platz 4: LFM-A: Microfilter 


Platz 5: LFX: Active carbon filter 



Part No.: 531029 

Order code: MSB4-1/4:D1:J4:I1:I3:L1-WP 

MS6 

Assortment of service units combinations 

for the food industry: MS6 

Compressed air quality: 1.4.1 – Smallest combination 

for decentralised compressed air preparation 












Part No.: 531030 

Order code: MSB6-3/8:J4:I1:I3-WP

MS6 

Compressed air quality: 1.4.1 – With membrane dryer 










Position 4: LDM: Membrane dryer, cartridge 3 



Part No: 531030 

Order code: MSB6-3/8:J4:I1:I3:G1-WP 

MS6 














Part No.: 531030 

Order code: MSB6-3/8:J4:I1:I3:L1-WP

MS6 


with membrane dryer 










Position 4: LDM: Membrane dryer, cartridge 3 




Part No.: 531030 

Order code: MSB6-3/8:J4:I1:I3:G1:L1-WP 

MS6 


with manual on/off valve 














Part No.: 531030 

Order code: MSB6-3/8:C1:J4:I1:I3:L1-WP

MS6 


with electrical on/off valve 



Position 1: EE: Electrical on/off valve 24 V DC 











Part No.: 531030 

Order code: MSB6-3/8:D1:J4:I1:I3:L1-WP 

MS6 


for standard compressed air and manual on/off valve 















qnN ~ 3300 l/min [∆p = 1 bar] 

Part No.: 531030 

Order code: MSB6-3/8:C1:J4:F1:I1:I3-WP

MS6 


for standard compressed air and electrical on/off valve 



Position 1: EE: Electrical on/off valve 24 V DC 












qnN ~ 3300 l/min [∆p = 1 bar] 

Part No.: 531030 

Order code: MSB6-3/8:D1:J4:F1:I1:I3-WP 

On-Off valve 

Filter 

regulator 

MS-series: Single components 

manual EM 

Manual on/off valves for use 

wherever problem-free access to 

a service unit is possible. With 

integrated lockability as standard. 

3/2-way valve for exhausting to 

atmosphere, with optional silencer. 

electrical EE 

Electrical on/off valves for use 

wherever manual access is difficult. 

These permit maximum flexibility 

for positioning. Integrated manual 

override ensures safety in the event 

of an emergency. 3/2-way valve 

for exhausting to atmosphere. An 

optional silencer is also available. 

Actuation with 24 V, 110 V or 230 V. 

LFR 

Functional integration of filter and 

regulator tasks. A combination of 

the LR and LF offering the advantages 

of both of these devices. 

It is also space saving since the 

units are integrated into one. 

Particularly suitable for prefiltration. 

Equipped with a manual or 

fully automatic condensate drain.

Branching 

module 

Filter 

LF, LFM, LFX 

Membrane 

dryer 

FRM 

Tapping of pre-filtered and 

regulated compressed air possible 

in all four directions. Connection 

of pressure sensors (PEV/SDE1) for 

precision monitoring of secondary 

pressure. 

LF 

5 different grades of filtration: Filter 

LF with 40 µm or 5 µm. Fine filter 

LFM with 1 µm, micro filter LFM 

with 0.01 µm and the active carbon 

filter LFX for a residual oil content 

of 0.003 mg/m3 . With manual or 

fully automatic condensate drain. 

The latching mechanism of the 

filter bowl reduces the risk of 

accidents. 

LDM 

Less humidity thanks to pressure 

dew point reduction by 13 Kelvin. 

Maintenance-free, since no wearing 

parts. 

Mountings 

Wall mountings 

Wall mountings in various dimensions 

– wide or narrow dimensions 

for module by module attachment. 

Alternatively, all modules can 

be built together and then mounted 

as a service unit. 

R/G pressure 

MA-…-RG 

gauge 

Standard pressure gauge housing- 

Diameters: 40, 50 and 63 mm. 

Especially designed for TPM 

measures. Scale with printed on 

green segment. Two adjustable 

tolerance segments (red).

Festo AG & Co. KG 

PO Box 

73726 Esslingen 

Germany 

Internet www.festo.com 

1103 

Telefon +49 (0) 7 11/347-0 

Fax +49 (0) 7 11/347-21 44 en 

E-mail service_international 

@festo.com 50004

Compressed air quality ensures good quality food! - Festo

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