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Freudenberg-NOK Sealing Technologies Announces Screw Connections Based on Hygienic Design Consistently Achievable



  Freudenberg-NOK Sealing Technologies Announces Screw Connections Based on
                   Hygienic Design Consistently Achievable

Moving toward new hygienic standards for screw connections in the food,
beverage, chemical and pharmaceutical industries

PR Newswire

PLYMOUTH, Mich., Sept. 16, 2013

PLYMOUTH, Mich., Sept. 16, 2013 /PRNewswire/ -- With its Hygienic Usit^® ring,
Freudenberg Sealing Technologies Process Seals has developed the first step
toward completely new hygienic standards for screw connections in the food,
beverage, chemical and pharmaceutical industries. For the first time, complete
screw connections meeting Hygienic Design standards are achievable with the
combination of Hygienic Usit rings and highly polished NovoNox screws and cap
nuts.

The innovative combination of special EHEDG-conforming washers – the Usit
rings – and special NovoNox screws makes it possible to safely eliminate the
danger of contamination at all screw connections for hygienic equipment and
devices.

The Hygienic Usit that Freudenberg has developed in accordance with Hygienic
Design is external-sealing and cleanly closes off the area between the screw
and the surface from any type of external influence, reliably protecting the
product whenever necessary. The configuration of a Usit ring with its
externally vulcanized, trapezoidal, elastic rubber sealing bead minimizes dead
space where deposits can form. The sealing bead is made of 70 EPDM 291, which
conforms to FDA and EU VO 1935/2004 and is nonhazardous based on USP Class VI
(121 degrees C; 250 degrees F).

NovoNox designed the screw and fastening nut especially for this Freudenberg
development. The hygienic solution for the screw connections was developed
jointly. As part of the solution, the trapezoidal contour of the sealing bead
creates a form closure with the flange seat of the screw, establishing optimal
sealing. The special screws also have no sharp-edged ridges, die marks, uneven
head contacts or impressions on their heads. This ensures that the sealing
bead will not be damaged as the screw is tightened.  In addition, the special
screws are polished completely to a high gloss with a mean surface roughness
of Ra < 0,2 micrometer to a maximum of Ra 0,04.

The combination of the Hygienic Usit, the even surface of the screw flange
seat, the polished surfaces and rounded screw and nut corners achieves a high
degree of hygiene for the entire screw connection. Impurities can neither
adhere to it nor penetrate it. This also reduces the danger of contamination
in the screw connections to the absolute minimum.

The Hygienic Usit is specially designed for hexagonal screws with flange in
accordance with DIN EN 1665 and defined as standard for the nominal sizes of
M5, M6, M8, M10, M12 and M16. NovoNox also provides the appropriate screws in
the sizes M5 to M16. Other dimensions are possible upon request.

About Freudenberg-NOK Sealing Technologies

Freudenberg-NOK Sealing Technologies is the Americas joint venture between
Freudenberg and Co. in Germany and NOK Corp. in Japan. Freudenberg-NOK is a
leading producer – through its Automotive, Merkel, Process Seals and Simrit
sales channels – of advanced sealing technologies for a variety of markets
including: aerospace;  agriculture;  appliance; automotive; construction;
diesel engine; energy; food and beverage; heavy industry; and pharmaceutical.

Founded in 1989 under the legal name Freudenberg-NOK General Partnership,
Freudenberg-NOK is headquartered in Plymouth, Mich. and operates more than 20
facilities across the Americas. For additional information, please visit
www.fnst.com.

SOURCE Freudenberg-NOK Sealing Technologies

Website: http://www.fst.com
Contact: Cheryl Eberwein, Director, Media Relations, +1 734 354 7373,
cheryl.eberwein@fnst.com
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