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AIR BLEED ORIFICE IMPROVES EFFICIENCIES IN HYDRAULIC SYSTEMS

By Lee Products on

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In today’s environment technology is constantly pushing for improved system efficiencies and industrial hydraulic systems is a good example of this where reduced weight and size of components and increased system pressures are often among the key requirements. With these objectives in mind a new range of AIR BLEED ORIFICES from THE LEE COMPANY will be of interest to Hydraulic Engineers who are looking to improve efficiencies and reduce system pressure losses.

Lee’s Industrial Micro Hydraulics Group (IMH) has developed a new 5.5mm Air Bleed Orifice which is an ideal solution to the problem of removing trapped air in hydraulic systems which can cause issues with system performance as air is compressible, whereas hydraulic fluid is not. Trapped air causes slower system reaction times or a ‘spongy feel’.

The traditional way to remove trapped air is often to drill a small hole approximately ø 0.5mm in the manifold allowing this air to escape back to the sump and so eliminating its negative effect on system performance. However, this drilled hole also allows hydraulic fluid to flow out of the system resulting in significant hydraulic loss, inefficient system performance and wasted energy.

A novel solution though is the Lee Air Bleed Orifice which removes this trapped air whilst keeping hydraulic pressure losses to an absolute minimum. It utilises a small precision flow orifice, with an integral 25µm safety screen for contaminant protection which allows trapped air to escape but is small enough to restrict most hydraulic fluid from passing. Crucially this minimises system losses and enables designers to optimise system component sizing which significantly contributes to improved efficiencies, reduction in overall system weight and ultimately lower costs.

The Air Bleed Orifice is 100% flow tested for consistent performance helping to reduce system losses by up to 99% (see graph attached) while the integral safety screen ensures reliability.

Its compact size and self-retained design for easy installation make it ideal for high volume applications in automotive, off-road and other industrial hydraulic systems.

Lee Products

Innovation in miniature since 1948. The Lee Company has pioneered the development of miniature, precision-fluid control components for aerospace, down-hole oil tools, machine tools, medical/scientific instrumentation and ink-jet printing.

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Innovation in miniature since 1948. The Lee Company has pioneered the development of miniature, precision-fluid control components for aerospace, down-hole oil tools, machine tools, medical/scientific instrumentation and ink-jet printing.

Lee’s unique capabilities in miniaturisation and engineering expertise keeps the company at the forefront of fluid flow technology. Lee Products maintains a sales force of graduate engineers who are ready to assist customers in solving fluid flow problems, and a significant amount of stock to ensure on-time deliveries.

Quality Assurance at Lee is a management commitment of the highest order. Lee Products Ltd achieved accreditation to ISO9002 in 1999 and ISO9001:2000 in 2003, while The Lee Company was one of the first aerospace companies to achieve accreditation to AS9000. The Lee Company has subsidiary companies in France, Germany, Italy and Scandinavia, and is represented by agents and distributors throughout the world.

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