All Seasons Curved Rail Grease
In climates that experience large temperature fluctuations between seasons, traditionally two different gauge face greases are used; a winter grade and a summer grade.
High performance curved rail grease
Typically, winter grades of curved rail grease used in trackside lubricators are a lower viscosity and NLGI grade to ensure the grease is pumpable and lubricators do not block in colder temperatures. In contrast to this, summer grades of rail grease are a higher NLGI (National Lubricating Grease Institute) grade and more viscous to enable them to form a good bead structure on the GDU (Grease Delivery Unit or ‘bar’), minimise fling off and extend carry down performance in warmer temperatures. Both winter and summer grease grades are formulated specifically to meet the challenges of their core operating temperature range.
Using two separate grease grades is not ideal as it creates additional complexity, increased maintenance and administrative costs with increased risk of using the wrong product at the wrong time of year. Unseasonably high or low temperatures can also affect performance greatly, for example a cold snap in spring when a network has changed over to summer grade can create issues with pumpability, or conversely, a warm front in late autumn can result in the winter grade grease not being firm enough to form a good bead structure for train wheels to collect and carry down the track.
To solve this problem, RS Clare has developed a range of greases which are extremely temperature stable, resulting in very consistent performance across all seasons. The EcoCurve range of all-season curved rail lubricants use specially formulated grease thickeners and base oils to increase stability in all temperatures and enable networks to use one grease grade all year round, removing the complexity, cost and risks associated with using multiple grades. The EcoCurve range also carries the European Ecolabel, meaning its biodegradable, non-toxic and non-bio accumulative which is crucial in this total loss rail application system.
If you are still using multiple grease grades for different seasons, get in contact and see how our EcoCurve range of all-season rail curve greases can transform the way you lubricate your track.
EcoCurve range of all season curved rail lubricants
ClareTech EcoCurve Trackside
EcoCurve Trackside is an environmentally friendly all-seasons curved rail lubricant appropriate for use in all types of trackside lubricators, delivering consistently high-performance across an operating temperature range of -40°C to 120°C. Designed to protect the gauge corner, EcoCurve Trackside is also suitable for lubricating switchplates and check rails.
ClareTech EcoCurve High Mobility
EcoCurve High Mobility is a unique and innovative, all-seasons curved rail grease designed specifically to provide increased pumpability in trackside applications where there are greater distances between lubricators and grease dispensing units (GDU) than typically encountered, like narrow tunnels or bridges, supported by a temperature stable operating range of -40°C to 80°C.
ClareTech EcoCurve Onboard
EcoCurve Onboard is a high performance, innovative, all-seasons gauge face lubrication solution designed for application via on-board wheel flange lubricators / ‘spray equipment’. Formulated to meet the unique challenges of onboard application and ensure optimal, consistent protection at the wheel/rail interface in operating temperatures ranging from -40°C to 80°C.
ClareTech EcoCurve Onboard 00 M
An optimised and high performance trainborne curved rail lubrication solution for metro and commuter rail networks. EcoCurve Onboard 00 M gauge face lubricant is an NLGI 00 rail lubricant that includes solid additives for an additional layer of wear protection and extreme pressure performance in all-seasons.
Features and benefits
- Reliable all-season performance removes the need for seasonal grease grades to reduce maintenance time and costs
- Consistent, effective performance across a range of operating temperatures for EcoCurve rail grease products, ranging from -40°C to 120°C
- Formulated to be oxidation stable to ensure the greases do not dry out or stiffen to block lubricators or grease dispensing unit (GDU) ports in trackside applications
- Water resistant to give lasting rail protection in all seasons and weather conditions, including heavy rain
- High load protection with EP properties to minimise rail wear in heavy traffic rail networks in all climates and seasons
- Highly adhesive grease technology enhances carry down performance and corrosion inhibitors offer improved continuous rail protection all year round
5 things you need to know about eco friendly rail greases
Read our green grease guide to find out more about how environmental performance is defined and measured for rail greases, and understand the importance of environmentally friendly lubricants for track lubrication.
Technical product information
| Product | Description | Delivery Method | Download TDS |
|---|---|---|---|
|
ClareTech EcoCurve Trackside |
For use in trackside curved rail lubricators, wherever there is a requirement for high performance and environmentally sensitive products. |
Trackside |
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ClareTech EcoCurve High Mobility |
For use in centralised distribution trackside lubricators. All the technical and environmental performance of EcoCurve Trackside, but designed to provide pumpability through narrow bores and long pipe runs whilst still forming a firm grease bead at the GDU. |
Trackside |
|
|
ClareTech EcoCurve Onboard 000 |
For use in on-board spray equipment wherever there is a requirement for high performance and environmentally sensitive products. Particularly suited to sensitive and high visibility urban sites |
Onboard |
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|
ClareTech EcoCurve Onboard 00 M |
An NLGI 00 lubricant for metro and commuter rail. For use in on-board spray equipment wherever there is a requirement for environmentally sensitive products with additional wear protection and high performance capabilities. |
Onboard |
Complex viscosity vs. temperature for all seasons curved rail grease
EcoCurve Heavy Haul curved rail lubricant is a premium quality, high-performance grease specially formulated for the heavy rail traffic of Class 1 railroads and freight rail networks.
The Rheology profile below compares the complex viscosity against temperature for Claretech EcoCurve Heavy Haul (blue) and a more conventional rail grease (red). The flatter profile of the blue curve shows that the all-seasons EcoCurve Heavy Haul grease is much more stable across a wide temperature range, meaning it will pump more consistently, not cavitate in the reservoir and it will form more a consistent bead structure on the GDU (Grease Delivery Unit). You can see that the conventional rail grease (red) is more viscous at temperatures below 0°C but then quickly softens as the temperature reaches 20°C and beyond, meaning it could be difficult to pump in the winter and perhaps too soft to form good bead structures in the summer, resulting in inconsistent performance across the changing seasons.
Case Study
Chicago City Transport (CTA) were experiencing problems with rain washing the grease off the track, leaving the rail without lubrication. This led to significant rail squeal issues when the trains navigated a particular curve, garnering noise complaints due to the location of the track and level of noise.
CTA's preference is to only have engineers on track for essential maintenance works and as an interim solution their lubrication team were having to manually apply lubricant on track as a back-up measure, and this was not a viable solution.
Meeting the highest eco standards
Engineered to EU Ecolabel standards, our unique technology EcoCurve range offers unrivalled environmental performance.
Download our rail friction management solutions brochure
Explore our full range of high-performance rail lubricants in our Rail lubrication brochure.
Our range of Rail friction management solutions includes Ecolabel accredited curved rail grease, top of rail friction control materials, gauge face greases, lubricants for infrastructure and application equipment.
