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
