Cylinder sealing options for the food industry

Cylinder seals for the food industry

In the food and splash zone of food processing operations, the use of appropriate materials is mandatory to prevent contamination and protect automation equipment that may be damaged by cleaning agents or foodstuffs.

 

Food approved cylinders from Festo are fitted with an FDA-compliant lubricant and wiper seal which comes as standard for use in environments involving direct contact with food products. However, there are other applications in the food industry which demand other types of seals, such as frequent detergent based wash down or in extreme temperature conditions. These aggressive types of applications require an alternative resistant seal option.

 

Therefore, choosing the right seal for the right environment is very important. We make this easier for you and show you what options are available with our food cylinder range. Take at look at some of the cylinder types and the different sealing options available from Festo's sealing system. 

Pneumatic cylinder options for the food industry

CRDSNU - Stainless-steel "Round" series CRDSNU product information 

DSBF - Clean-design "Smooth Profile" series DSBF product information

DGRF - Clean-design "Guided" series DGRF product information

CDC - Clean-design "Compact" series CDC product information

CRHD - Stainless-steel "Round" series CRHD product information

CRDNG/S - Stainless-steel "Tie-rod" series CRDNG/S product information

Sealing variant options in the modular system         

Rod seal material

Suitable

cylinder types

Food seal

Standard seal

 

TPE-U (PUR)

FDA approved

CRDSNU

DSBF

CRHD

CRDNG/S

DGRF

CDC

A1 Increased chemical resistance FKM/FPM

CRDSNU

DSBF

A2  Hard scraper seal 

TPE-U (PUR) with CRDSNU and PUR

with DSBF

CRDSNU

DSBF

A3

Unlubricated operation

 

UHMW-PE

FDA approved

CRDSNU

DSBF

DGRF

S6,  

T1,

T4

Heat resistant seal

 

FKM/FPM

CRDSNU

DSBF

CRHD

CRDNG/S

CDC

TT,

T3

Low temperature seal

 

TPE-U (PUR)

CRDSNU

DSBF

Sealing variants from Festo's modular system

Standard food seal

  • Permanent temperature resistance from -25 to 85°C
  • Practically no hydrolytic degradation in moist/humid environments
  • High resistance to highly alkaline media 
  • Practically un-attackable in media with pH value of 1 to 14
  • Usable in alcohol/water and ethylene glycol mixtures

 

Alternative sealing variants

 

A1: Increased chemical resistance

  • Chemical resistance against acids/oils
  • Hydrolysis resistance (water)
  • High temperature resistance

 

A2: Hard scraper seal

  • Applications where the piston rod can be burdened with dust, chips, ice, milk and crystals
  • This version is fitted with a hard-chromed plated piston rod

 

A3: Unlubricated operation

  • Long lifetime with inadequate lubrication (dry run)
  • All applications where grease of piston rod gets washed away
  • Very good hydrolysis resistance
  • Very good resistance to acids and bases
  • Areas with direct contact to food

 

 S6 / T1 / T4: Heat resistant seal
  • Contact with acids or oils at high temperatures
  • Temperature range 0 … +120 °C for versions T1 and S6
  • Temperature range 0 … +150 °C for version T4

 

TT / T3: Low temperature seal

  • Temperature range –40 … +80°C
  • For applications in highly chilled environments
  • Handling of frozen products
  • Outdoor usage in extreme conditions

 

Further information

Cylinder Sealing Options for the Food Industry - OVERVIEW

Sealing options for the food industry - Overview

 

Hygienic and efficient automation in the production of food

Corrosion resistant classes

Food approved cylinders from Festo are either CRC3 (strong protection against corrosion stress) or CRC4 (extreme protection against corrosion stress). Find out more