Two New Dual purpose Filters
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catches the bulk of the foreign matter. The third and final stage employs a solid-drawn material shaped like a hat.
To change over to the clean filter it is necessary to loosen the two banjo connections, when the unit may be turned through 180 degrees and the new element comes into operation. The balls in the inlet and outlet valves fall by gravity on to the seats in the used filter and effectively seal it. The dirty element may then he cleaned when convenient.
The second new filter is of the twinreversible type, having two filter chambers, the change-over being made by a two-way cock. A feature of the design is that the ports in the changeover cock are arranged so that one filter is always in action, whilst the other is being changed over, even when the change-over is effected with the engine running. Two types of elentept are available for lubricating oil,, and several for fuel oils.