Protect liquid food with overpressure

Min­i­miz­ing risks dur­ing the pro­cess­ing of such sen­si­tive food­stuffs requires a high lev­el of hygiene — whether for milk or liq­uids con­tain­ing milk, cream, raw fruit juices, veg­an soy drinks, liq­uid egg, sug­ar-free lemon­ades. A gate­way for bac­te­ria, yeasts and fun­gal spores can be silos and tanks where liq­uid foods are tem­porar­i­ly stored pri­or to fur­ther pro­cess­ing or fill­ing. One poten­tial source of con­t­a­m­i­na­tion is impure air that enters the tanks through open vents, for example.

The TPU 500 tank over­pres­sure sys­tem effec­tive­ly and per­ma­nent­ly keeps germs and harm­ful par­ti­cles away from the valu­able liq­uid goods. The hygien­ic air qual­i­ty thus cre­at­ed avoids rejects, pro­tects prod­ucts from spoilage and the health of con­sumers. It ensures high prod­uct qual­i­ty and long shelf life. The lat­ter is par­tic­u­lar­ly impor­tant when liq­uid foods are pas­teur­ized or sub­ject­ed to com­plex fur­ther pro­cess­ing, such as fresh milk to yogurt, quark and cheese or liq­uid egg to baked goods and con­ve­nience products.

Freuden­berg Fil­tra­tion Tech­nolo­gies offers food man­u­fac­tur­ing and pro­cess­ing com­pa­nies a wide range of fil­tra­tion mate­ri­als and fil­ter mod­els in liq­uid and air fil­tra­tion and dust removal tech­nol­o­gy. This is com­ple­ment­ed by com­pre­hen­sive con­sult­ing and ser­vices right through to engi­neer­ing sys­tem solu­tions. The new TPU 500 tank over­pres­sure sys­tem — the abbre­vi­a­tion TPU stands for Tank Pres­sure Unit — is one of these lat­ter com­plete sys­tems from a sin­gle source.

Contamination-free air blanket forms safety corridor

Its basic prin­ci­ple is as sim­ple as it is sophis­ti­cat­ed in detail. The TPU 500 sys­tem cre­ates an air blan­ket free of bac­te­ria, yeasts and molds above the liq­uid raw, inter­me­di­ate and end prod­ucts. A slight over­pres­sure in this air blan­ket ensures that no impure out­side air comes into con­tact with the food — even when emp­ty­ing the tanks and silos. Inci­den­tal­ly, Freuden­berg’s hygiene pro­tec­tion sys­tem works just as reli­ably in fill­ing plants in the bev­er­age and food industries.

The man-sized mod­u­lar design con­sists of ful­ly weld­ed stain­less steel hous­ing sec­tions con­nect­ed with lock­ing latch­es; each sys­tem can be cus­tomized to meet spe­cif­ic on-site spec­i­fi­ca­tions and require­ments. The mod­u­lar­i­ty allows for easy and safe replace­ment of air fil­ters. The con­tin­u­ous vol­ume flow of the sys­tem reg­u­lates itself ful­ly auto­mat­i­cal­ly. The TPU 500 unit con­tin­u­ous­ly mon­i­tors the pres­sure devel­op­ment and indi­cates nec­es­sary fil­ter changes to oper­a­tors in good time — for opti­mized pro­duc­tion process­es and results in food manufacturing.

Two filter stages for controlled air quality

Speak­ing of fil­ters. At the heart of the sys­tem is the Group’s fil­ter tech­nol­o­gy, which has been tried and test­ed in the food and bev­er­age indus­try. Two fil­ter stages con­sist­ing of reli­able pre­filters and high-sep­a­ra­tion final fil­ters pro­duce the hygien­ic air qual­i­ty. The exact fil­ter con­fig­u­ra­tion varies depend­ing on the appli­ca­tion and local con­di­tions. All the fil­ter series in ques­tion are micro­bi­o­log­i­cal­ly inac­tive and harm­less in con­tact with food­stuffs. They meet the rel­e­vant food con­for­mi­ty stan­dards and com­ply with the rel­e­vant rec­om­men­da­tions of the Euro­pean Hygien­ic Engi­neer­ing and Design Group (EHEDG doc. 47).