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
tristan88 –
100% recommended. Great customer support. Everything was smooth and fast. Really good value for money.
evelyn_sky –
This solved my problem completely!
Annika Q. –
It completely solved my problem! Very fast delivery, thank you. Great product, worth every cent.
daniela89 –
Packaging was slightly damaged, but the product is excellent. Better than anything I’ve tried before. I’ve been using it for 2 weeks and already see results!
Matteo F. –
Very fast shipping. Very satisfied with the purchase. Very satisfactory.
penelope23 –
Looks even nicer in person.
paula88 –
Looks even nicer in real life. Surprisingly good quality for the price. I was skeptical, but now I’ll order regularly.