Freudenberg-NOK Sealing Technologies Announces New PTFE U-Cup Design for Automotive Applications

   Freudenberg-NOK Sealing Technologies Announces New PTFE U-Cup Design for
                           Automotive Applications

New Duo Forseal design boosts performance and helps lower emissions

PR Newswire

PLYMOUTH, Mich., Oct. 1, 2013

PLYMOUTH, Mich., Oct. 1, 2013 /PRNewswire/ --Freudenberg-NOK Sealing
Technologies today announced that is has created Duo Forseal – a new design
for double-acting polytetrafluoroethylene (PTFE) U-Cups that are used on
direct injection automotive systems to seal the pump plunger driven by the

The universal properties of PTFE make U-cups highly resistant to all types of
motor oils and fuels but with the new Duo Forseal design, Freudenberg-NOK
Sealing Technologies (Freudenberg-NOK) can offer a significantly improved and
better performing injection plunger seal.

Engines with gasoline direct injection are very efficient but require higher
pressures between advanced injection pumps and their corresponding injection
nozzles than traditional air intake systems. The Duo Forseal makes an indirect
contribution to emissions reduction because it is designed for this high
pressure load. Additionally, its patented technology contributes directly to
reduced emissions through lower leakage rates compared to traditional designs.

The new seal design provides all the technological characteristics of the
current model lines, is cost efficient and offers universal resistance to all
types of fuels including E100, and can be used for plunger frequencies to more
than 200 Hz. It is also easy to install due to its symmetrical seal
configuration and its leakage rate has been minimized below the required
specifications of the automobile industry. Furthermore, the Duo Forseal
design's stainless steel spring provides reliable radial sealing forces.

The new PTFE compound used in the Duo Forseal shows an excellent abrasion
resistance, especially in contact with plungers coated with diamond-like
carbon (DLC), it has proven a long-term stability without affecting the

With an operating life of far more than a billion strokes, the Duo Forseal
injection plunger seal from Freudenberg-NOK offers a level of quality
significantly above the standard demanded today.

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

SOURCE Freudenberg-NOK Sealing Technologies

Contact: Media, Cheryl Eberwein, Director, Media Relations, Office: +1 734 354
7373,, or Leslie Dagg, Bianchi PR, Office: +1 248 269
Press spacebar to pause and continue. Press esc to stop.