Klüber Unisilkon L 250 L Grease for valves and fittings 500g cartridge

Klüber UNISILKON L 250 L Special lubricating grease for drinking water, beverage and heating valves and fittings

• UNISILKON L 250 L is a special lubricant based on silicone oil and PTFE with high thermal stability. UNISILKON L 250 L offers good penetration ability in small lubrication gaps and lube points of difficult access. Owing to its relatively high viscosity, adhesion is improved even in case of unfavourable geometries.
• UNISILKON L 250 L is resistant to cold and hot water, superheated steam up to approx. 130 °C as well as industrial cleaning agents and disinfectants. UNISILKON L 250 L is also resistant to pumpable foodstuffs and beverages like fruit juices, beer or milk products. UNISILKON L 250 L is not resistant to
• organic solvents or strong acid and alkaline solutions.
• UNISILKON L 250 L is NSF H1 registered and therefore complies with FDA 21 CFR § 178.3570. The lubricant was developed for incidental contact with products and packaging materials in the food-processing, cosmetics, pharmaceutical or animal feed industries. The use of UNISILKON L 250 L can contribute to increase reliability of your production processes.
• We nevertheless recommend conducting an additional risk analysis, e.g. HACCP.
• Temperature range: -45°C to +160°C 
• Volume: 500g
• Also available in: Cartridge 500g, Can750 g, Bucket 30kg

Benefits for your application

• Proven effective in valves and fittings as well as adjusting mechanisms in the drinking water, beverage, sanitary and heating sectors
• Certified acc. to international standards for valves and fittings, e.g. DVGW-KTW, WRAS, ACS, AS 4020, NSF Standard 61 and NSF H1
• Long-term protection of seals and bearings owing to the lubricant’s good resistance to numerous media like disinfectants, cleaning agents, water, steam

Applications

• UNISILKON L250L is used as lubricating and sealing grease for:
  • domestic valves & fittings for drinking water, (e.g. ceramic discs and piston cartouches, thermo regulators). As the lubricant’s viscosity is rather independent of service temperatures, UNISILKON L250 L allows constant actuating forces within the whole cold/hot water range of e.g. single-lever mixer taps.
  • valves and fittings of heating installations (e.g. thermoregulators, tap cocks, pressfit seals)
• UNISILKON L250 L has also proven effective as assembly aid for radial shaft seals and packings in contact with cold or hot water and steam.

Application notes

UNISILKON L 250 L 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 250 L can be applied by means of spatula, brush, usual metering devices or the tampon printing method. Please observe the material safety data sheet.

Technical specifications

Article number	0221020594
NLGI grade, DIN 51818	3
NSF-H1 registration	141 714
Chemical composition, type of oil	methyl silicone oil
Chemical composition, solid lubricant	PTFE
Lower service temperature	-45 °C / -49 °F
Upper service temperature	160 °C / 320 °F
Color space	white
Texture	fibrous
Texture	homogeneous
Density at 20 °C	approx. 1.25 g/cm³
Worked penetration, DIN ISO 2137, 25 °C, lower limit value	220 x 0.1 mm
Worked penetration, DIN ISO 2137, 25 °C, upper limit value	250 x 0.1 mm
Shear viscosity at 25 °C, shear rate 300 s-1, equipment:rotational viscometer	approx. 13 000 mPas
Kinematic viscosity of the base oil, DIN 51562 pt. 01/ASTM D-445/ASTM D 7042, 25 °C	approx. 1 350 mm²/s
Copper corrosion, DIN 51811, (lubricating grease), 24h/100°C	1 - 100 corrosion degree
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 UNISILKON L250L, Klueber, Kluber UNISILKON L250 L, L 250L