TPi May 2017

Fi t t ings , valves , f langes & connectors

High performance seal available on extended range of deep groove ball bearings

The seal is made from acrylo-nitrile- butadiene rubber (NBR), which is resistant to mineral oil-based lubricants, petroleum products and animal or vegetable fats. It has an operating temperature range of -40 to +100°C and up to +120°C for brief periods. Previously only available on bearings with a bore diameter of 25mm or less, the RSH seal has now been further developed and tested for use in bearings up to 60mm in bore diameter. Users can specify SKF Explorer deep groove ball bearings with the new RSH seal installed on one or both sides, depending on the requirements of the

SKF is making its RSH seal design available on a larger range of Explorer deep groove ball bearings. The RSH seal uses an optimised dual- lip configuration to provide additional protection in demanding environments. For users, the result is bearings that last longer, especially in wet, contaminated or dusty operating conditions. The secondary lip on the seal withstands high-pressure cleaning and offers increased resistance to the ingress of dust and other contaminants, while the seal’s internal geometry has been optimised for smooth running and improved grease retention.

SKF Explorer range. These include numerous shield and seal configurations and a choice of cage materials and lubricants. Explorer was originally developed to take advantage of research into high- purity steels with improved fatigue resistance, allowing the development of bearings with a longer rated life and lower friction. Deep groove ball bearings joined the range 14 years ago. SKF – Sweden www.skf.com The secondary lip withstands high-pressure cleaning and increases resistance to contaminants

end application. The new bearing variants are already being introduced, and the full range will be available worldwide by July. The extended RSH offering joins a growing list of options and improvements in the

Safety valves: protecting employees, equipment and the environment

implosion, for example due to a vacuum caused by cold rinsing after hot cleaning or blocking of gas supply during emptying. The Alfa Laval Safety Valve can be combined with the Alfa Laval SB Anti Vacuum House into a combined safety valve, protecting against both vacuum and overpressure in one hygienic valve solution with a single tank connection. Alfa Laval – Sweden

to normal. Key features include dedicated and reliable protection against accidents; calibration to the desired pressure set point, sealed and delivered with a PED certificate; and a hygienic design that eliminates unsanitary leaks and overflow during and after pressure peaks. The company also recently introduced a range of Alfa Laval Scandi Brew anti-vacuum and overpressure valves. These safety valves protect against overpressure in tanks and pipelines, eg from overfilling or fermentation processes. They also protect against

Alfa Laval has introduced the spring- loaded Safety Valve, designed to protect both equipment and people. In a potentially dangerous situation, the valve will open at a pre-determined pressure. The compressed spring force keeping the valve closed is forced open when pressure builds up at the inlet of the safety valve. As these forces balance out, the valve will discharge and decrease pressure, ultimately reclosing as the system returns

info@alfalaval.com www.alfalaval.com

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TUBE PRODUCTS INTERNATIONAL May 2017

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