DAIRY MACHINERY.

Hawera & Normanby Star, Volume XXXXI, Issue 70454, 3 October 1900, Page 4

DAIRY MACHINERY.

The most important part of the agricultural exhibits of Sweden at the Paris Exposition, observes " Engineering," are those referring to the centrifugal cream separators, which are best represented by the Laval machines, especially of the Excelsior and radiator types. The Laval separator is shown in operation every day in the Swedish pavilion. In this interesting collection of Laval there is quite a small hand model, which is able to treat forty litres of milk an hour, the high efficiency being obtained by a number of internal partitions in the separating bowl. Important improvements have been introduced into the separators driven by steam direct; the gun-metal turbine resembles a tangential water-wheel, and the separator which treats 4400 litres of milk an hour works with a steam pressure of 141b ; the 600 litre model requires a pressure of 201b, and the large model treating from 1200 to 1800 litres per hour requires a pressure of 401b. In Sweden large dairies V9ry commonly employ the directdriven turbine separators, which have the advantage of working quite independently of the other, and beltrdriven machines of the dairy. The efficiency of separation depends to a large extent on speed of the bowl, which ought to be constant. Now, -in these installations where the transmission is made by belts or ropes, starting and stopping the dairy engine naturally- involves considerable variations of speed in the separator ; this inconvenience is avoided in the turbine-driven machines, which, moreover, can be located in any convenient division, quite independent of the transmission shaft.