Description
UNISILKON L 641 Special grease for drinking water, beverage and heating valves | N° 022121
- UNISILKON L 641 is a special lubricating grease based on silicone oil and PTFE for valves and other elements in the heating, beverage and sanitary sector. UNISILKON L 641 offers good penetration ability in small lubrication gaps and lube points of difficult access. As its viscosity is rather independent from service temperatures, UNISILKON L 641 allows constant actuating forces within the whole cold/hot water range of single-lever mixer taps. Due to its chemical composition, UNISILKON L 641 has shown to be resistant to various substances in the food-processing and beverage industries like beer, milk, juices, liquors, acid and alkaline disinfectants.
- UNISILKON L 641 is not compatible with most organic solvents as well as acid and alkaline solutions.
- Temperature range: -40°C to +160°C
- Volume: 60g tube
- Also available in: 500g can, 30kg bucket
Benefits for your application
- Excellent wetting power
- Operational smoothness due to a good viscosity-temperature behaviour
- Very good resistance to water and water vapour
- High thermal stability
- Good sealing effect
- Neutral towards metals, many elastomers and plastics
- NSF H1 registered
Applications
- UNISILKON L 641 is used as sealing and assembly aid for seals and packings in contact with water or water vapour, e.g.: domestic installations – ball valves; single-lever mixers – piston cartouches, ceramic discs; mixer taps with two handles – swivel spouts, shower switches, shower heads; thermostatic mixer taps – thermo regulators and elements; heating – thermostatic valves, tap cocks, pressfit seals; water hydraulics – sealing grease for radial shaft seals.
Application notes
- UNISILKON L 641 is neutral towards most metals, thermoplastics and elastomers.
- Owing to the many different elastomer and plastic compositions their compatibility should be checked prior to series applications. UNISILKON L 641 can be applied by means of spatula, brush, usual metering devices or the tampon printing method.
Technical specifications
| Chemical composition, type of oil | methyl silicone oil |
| Chemical composition, solid lubricant | PTFE |
| Lower service temperature | -40 °C / -40 °F |
| Upper service temperature | 160 °C / 320 °F |
| Color space | white |
| Texture | long-fibred |
| Texture | homogeneous |
| Density at 20 °C | approx. 1.18 g/cm³ |
| Worked penetration, DIN ISO 2137, 25 °C, lower limit value | 300 x 0.1 mm |
| Worked penetration, DIN ISO 2137, 25 °C, upper limit value | 320 x 0.1 mm |
| Shear viscosity at 25 °C, shear rate 50 s-1, equipment: rotational viscometer, lower limit value | approx. 135 000 mPas |
| Shear viscosity at 25°C, shear rate 50 s-1, equipment:rotational viscometer, upper limit value | approx. 205 000 mPas |
| Drop point, DIN ISO 2176, IP 396 | >= 230 °C |
| Water resistance, DIN 51807 pt. 01, 3 h/90 °C, rating | <= 1 – 90 |
| Minimum shelf life from the date of manufacture – in a dry, frost-free place and in the unopened original container, approx. | 36 months |
KLÜBER LUBRICATION MÜNCHEN GMBH & CO. KG, Geisenhausenerstraße 7, 81379 München, GERMANY, +49 89 7876 0, [email protected], www.klueber.com
quentin_fr –
Top product, top price. Super value for the money. Durable product.
stefano_it –
Very easy to use. Fast shipping, great service.
Caroline –
Surprisingly good quality for the price. A friend recommended it; I’m very happy with the purchase.
anna.star –
A friend recommended it; I’m very happy with the purchase. Packaging slightly damaged, but the product is excellent. Perfect for my needs; I’m very satisfied. The quality pleasantly surprised me.
eva_s –
Very effective, I noticed a change in just a week. Solved my problem completely!
gabriele_it –
Works without any issues. Perfect job, thanks. No issues at all so far.
Johanna D. –
Pleasant to use at home. Feels nice to use at home. Very satisfied, it’s even better than I expected. Not too big, not too small, perfect.
Filippo –
Everything in order. Really good value for money.
thomas_88 –
Works without any issues. Excellent material. Excellent packaging. Solid product, would buy again.
Arthur –
Good build quality and reliable. Better than I thought; I’m satisfied. Arrived right away, excellent service. Great customer support.
Pietro E. –
Great service and product. Practical and functional. Well-made product.
chiara_sun –
Packaging slightly damaged, but the product is excellent. Very effective; I noticed a change in just one week.
james_88 –
Super practical.
pauline_88 –
Perfect for my needs; I couldn’t be happier. Very effective; I noticed a change in just one week. I was skeptical, but now I’ll order it regularly. Very satisfied, better than I expected.