Case Study: KOSME Bottling Equipment
Background
KOSME designs and manufactures a full range of bottling and beverage line equipment for filling, labelling, and stretch blow molding. The company was looking to replace an existing grease with an NSF H1 incidental food contact product to lubricate the O-ring seals of a pneumatic cylinder. The cylinder is a rotating piece of equipment that requires all seals to survive hundreds of thousands of cycles. Lubricating the o-ring seals can help protect the application from abrasion damage. The seals are made of EPDM elastomer and require good material compatibility from a lubricant. KOSME reached out to one of Nye's affiliates to find a compatible grease.
Challenges
- Lubricant must be NSF H1 Registered and compatible with EPDM elastomers.
- Can the lubricant eliminate stick-slip friction on the cylinder and exhibit long-term elastomer life under accelerated wear testing?
Solution
Fluorocarbon Gel 880FG & GLEITMO SIL 885FG
PTFE-thickened, heavy viscosity dimethyl silicone greases.
- NSF H1 registered, Halal & Kosher certified, and WRAS approved
- Excellent water resistance
- Mechanical stability under a wide temperature range
| Product | Chemistry | Temp Range (°C) | Water Washout (60 minutes @40°C) | Copper Corrosion (24 hrs @ 100°C) |
|---|---|---|---|---|
| FLUOROCARBON GEL 880FG | Dimethyl Silicone/PTFE | -40 to 200 | 0.25% | 1b (Slight tarnish) |
| GLEITMO SIL 885FG | Dimethyl Silicone/PTFE | -40 to 200 | 1.74% | 1b (Slight tarnish) |
Results
The cylinders were lubricated with the Fluorocarbon Gel 880FG and GLEITMO SIL 885FG and cycled for several hundred thousand repetitions. The cylinders were evaluated for smoothness (no stick-slip) and wear on the seals. Fluorocarbon Gel 880FG and GLEITMO SIL 885FG passed all test requirements, confirming the lubricants will prevent stick-slip friction and wear throughout the lifespan of the O-ring. KOSME chose to use both products to lubricate the seals. These products are now specified in for the first fill on each filling machine.
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