The latest edition of in the groove, the Trelleborg Sealing Solutions magazine aimed at engineers, is now available. The online version is fully interactive and printed copies can be ordered from your local Trelleborg Sealing Solutions marketing company.
- Hydraulics – Robots are moving, thanks to Trelleborg’s high-end seals
- Oil & Gas – Double-acting seals on the world’s largest crane
- Offshore – An overview of Trelleborg’s sealing solutions topside and subsea
- Service – Details on our latest literature and smartphone apps
- PTFE based Material – Turcon® M12 for almost every hydraulic application
- Aerospace – Details of latest materials specifically for aircraft
- Processing – Teaming up with cleaning agent suppliers to establish optimum materials
- Motorcycles – An insight into sealing products supplied for motorcycles
- Polyurethane Material – Z25 engineered for high-temperature applications
- FKM Material – VC205 combines excellent high-temperature performance with cold flexibilty
- Guest Column – Trends in the fluid power industry
And… Give us your feedback
In the interactive pdf you’ll find a link to our in the groove survey. Tell us what you think and you can win prizes.
Trelleborg’s Turcon® MF6 and Zurcon® Z431 PEEK™ seal and bearing materials have third party verified declaration of conformance to the latest version of 3-A Sanitary Standard 20-27. Capable of withstanding high temperatures and the cleaning regimes used in food and beverage manufacturing, the compounds provide excellent tribological and sealing capabilities, offering real benefits in terms of extending seal and bearing life in hygienic dynamic applications.
Specifically formulated for food contact, pharmaceutical and medical applications
Suitable for a wide range of seal profiles, scrapers and wear rings, Turcon® MF6 is part of the Trelleborg Sealing Solutions Turcon® MF range of polytetrafluoroethylene (PTFE) based sealing materials specifically formulated for food contact, pharmaceutical and medical applications. While the recently launched Zurcon® Z431 PEEK™, is ideal for valve and bearing applications.
“As far as we know, we are the only seal and bearing supplier who has undergone and passed a third party verification inspection for the 3-A Sanitary Standard number 20 for thermoplastic materials,” says Ferdinand Schwabe, CPI Segment Manager for Trelleborg Sealing Solutions Europe. “Up until 2003 the 3-A Sanitary Standard could be self-certificated. Now, to be listed on the 3-A website and receive the authorization to use the 3-A symbol, you have to complete evaluation through a third party who is accredited by 3-A Sanitary Standards Incorporated. This is important for many of our key customers in the food and beverage sector.”
Conforming to a variety of standards
The Turcon® MF6 and Zurcon® Z431 PEEK™ material passed 3-A cleanability response and product immersion tests according to 3-A Sanitary Standard number 20-27. This is in addition to passing migration tests for aqueous, acidic and fatty food in repeated contact according to directive 2002/72/EC as well as sensory tests passed at 90 cm2 per liter/ 52.8 in2 per gallon surface/ volume ratio at +95°C/ +203°F for 30 minutes and FDA extraction tests according to 21CFR177.2415. Turcon® MF6 compound is also listed by NSF International as conforming to the requirements of NSF/ANSI Standard 51 – Food Equipment Materials.
The 3-A certification applies to seals supplied through the Logistics Center Europe in Germany, which distributes product to the majority of customers in Europe. The materials are available in a wide range of seal profiles, scrapers, wear rings, bearing and valve components to suit specific application needs.
Guangzhou Tech-Long, the largest manufacturer of PET (polyethylene terephthalate) bottle blow molding machines in China, needed a sealing solution for the dispenser located in the center of a blow molding machine, the core part of the machine where failure can lead to high costs due to lost production time. To achieve optimum performance the choice was a specially developed Turcon® PTFE based compound. A number of seals were specified including a custom Turcon® Roto Glyd Ring®, with a unique pressure relieving function.
The aim is to maximize production
The sealing system within the dispenser needed to operate in 1 to 4 MPa/ 145 to 580 psi dry air pressure at rotational speeds of 150 mm/s / six in/s non-stop for between 16 to 20 hours per day.
Image shows a Tech-Long dispenser
“We are continually trying to offer our customers machines that maximize production capability while minimizing downtime for maintenance,” says Zou DaQun, Technical Director of Tech-Long. “Trelleborg Sealing Solutions is a very good partner to Tech- Long. They do not just sell products but more importantly provide professional technical services and solutions. That is what Tech-Long is really interested in and why we have been in cooperation with Trelleborg for 10 years continuously.”
Successfully sealing dry air
Dry air is a difficult medium to seal. To successfully do this the seal must initially demonstrate a very smooth and tight dynamic sealing surface after a short run in. It must then have outstanding wear resistance in poorly lubricated conditions.
Sealing configurations from Trelleborg Sealing Solutions are now successfully operating in Tech-Long PET bottle blow molding machines globally. Tech-Long and Trelleborg Sealing Solutions continue to work together on new developments.