NEW EQUIPMENT

18th September 1964, Page 94

18th September 1964

Page 94

Page 94, 18th September 1964 — NEW EQUIPMENT

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Keywords : Boilers, Heating, Ventilating, And Air Conditioning, Plumbing, Fluid Dynamics, Mechanical Engineering, Swashplate, Pump, Cylinder, Sump, Water Heating

and Publications

Hydraulic Piston Pumps and Motors ANEW range of in-line hydraulic piston pumps and motors has been introduced by Vickers Sperry Rand Ltd. The range includes units which can be of either fixed or variable displacement. The pumps are capable of delivering 3.3, 4.3, 6.6, 10.3, 13-4 and 19-2 imp. gal./min. when running at 1,440 r,p.m. Maximum operating speeds and pressures for the range extend up to 3,600 r,p.rn, and 3,000 p.s.i., but reduced speeds and pressures are recommended for long-life applications: When fitted with special seals the range is approved for use with fire-resistant fluids.

The object of the in-line design is to achieve low cost through progressive engineering and manufacturing techniques. Extensive use is made of sintered metal parts and simplified design has reduced individual components to a minimum. Pressure compensator techniques are used to obviate the need for relief valves and thus more compact installations can be achieved.

Each unit has nine pistons that reciprocate as the cylinder block is rotated. Welded to each piston is a ball on to which a shoe is swaged—this seats against the swashplate to form a universal joint. The pistons are hollow—a hole drilled through the ball end of the piston and through each shoe allows fluid to act between the ball end of the piston and the shoe and between the swashplate and the shoe. This provides internal lubrication as well as hydraulic balance.

A spring holds the cylinder block against the valve plate and also acts upon the spherical washer which retains the shoe plate on the intake stroke. The shoe plate, in turn, retains the piston shoes against the swashplate. The spherical washer also acts as a bearing surface for the shoe plate as it moves with piston reciprocation.

Swashplate angle is pre-set in constant displacement units, but can be adjusted in variable displacement units by means of the yoke. The four methods of controlling the yoke are pressure compensator, lever, handwheel and manual screw. Made by: Vickers Sperry Rand Ltd., New Lane, Havant, Hants,

Expanded Rubber and Plastics A SECOND edition of the company's publication list is now 1-1available from Expanded Rubber and Plastics Ltd. It describes the various publications currently available dealing with the firm's products. These are mainly of closed cell expanded material—either rubber or plastics.

Published by: Expanded Rubber and Plastics Ltd., Mitcham Road, Croydon, Surrey.

Oil Remover rILD deposits of sump oil or sludge which accumulate on

garage floors are both unsightly and dangerous. There are various means of removing them, and one such product has recently, been tested. Used to remove a deposit of sump oil, which had dropped over a period of about two years and covered about four square feet, Uni-Klenz proved effective.

It is simply sprinkled, neat, on the sludge and after a few minutes the area can be hosed down. A second application was necessary to clear a few ingrained spots. Because Uni-Klenz, in effect, emulsifies the oil patch care has to be taken thoroughly to wash the area. Uni-Klenz must not be used on plastics, bitumen or hot metal surfaces.

The makers claim that the cleaner can be used equally effectively on grease—to clean engines, for instance.

Made by: Leedex Ltd., Brunning House, 100 Whitechapel Road, London, E.I.

Prices: £1 10s. per gallon; 16s. per f gallon; 2s. 6d. per 10 oz. tin.

Oil Firing for Space Heating ANEW booklet called " Oil Firing for Space Heating" has been produced by The Power Petroleum Co. Ltd. It deals with the types of burners and grades of fuel oil which are considered most suitable for space heating plant—such as hot water boilers and air heaters.

The attractively presented 16-page publication contains chapters on hot water boilers (including the conversion of sectional boilers to oil firing), oil-fired air heaters, and on various types of burner. It also contains useful information on controls, storage of oils and on fire precautions.

Free copies of the booklet are obtainable from The. Power Petroleum Company.

Published by: The Power Petroleum Co. Ltd., Cecil Chambers, 76-78 Strand, London, W.C.2.

Shelving System ASHELVING system employing a new method of

construction is now available from Slydang Ltd. This system, called Slydang, has already won a Design Centre Award. The unit is of light, solid construction—without holes and slots. Instead, a special steel section is used which accommodates cleats at any point along its length. Shelving is bolted internally to this to give a sound mechanical fix—at the same time making the fullest use of the structural strength of the steel. As well as being stable, the structure has a clean outline and attractive appearance making it suitable for display and storage purposes.

Slydang is produced in various finishes, Assembly of the standard unit, using only a fixed open-ended spanner,' is claimed to be simple. Special purposemade structures can be built readily using a hacksaw.

One of the uses to which this shelving system is being put is as a mobile tyre display stand.

Made by: Slydang Ltd.. Narborough, nr. Leicester.

NEW EQUIPMENT

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