The most popular oil-to-air cooler is the platen range, which was first manufactured in the late 1950s. These coolers manufactured to our specifications since 1965 must be the most commonly used component in racing cars worldwide.
|The cooler consists of a variable number of aluminum pressure plates forming an oil circuit and a terminal tank, the oil circuit containing a choke. Not only can these decompose the boundary layer effects in the flow to achieve maximum heat dissipation without undue pressure drop, but because they are brazed to both surfaces of the board, they are held together under pressure. The oil passage is interspersed with louvered aluminum strips and corrugated to provide an air passage.|
The design is simple and efficient, and is ideal for mass production, but limited to 2" thickness and limited length. The secret of Mocal cooler success is that we adhere to the highest standards of construction quality in a rigorous inspection system, with particular emphasis on the accuracy of the pressing tool. To ensure the closest contact of the plates during the “Nocoloc” brazing process, we ensure that we are superior to the Far East.
Maximum working pressure on the standard range of coolers is 10 bar (150psi) although each cooler is tested to 11.5 bar (170psi) this is adequate for all but the most arduous motoring applications, however some customers prefer a higher pressure rating, for instance where the pressure by pass valve does not provide enough protection as in high rpm in cold start up conditions or on dry sump installations.
We have introduced a heavy duty (HD), 12bar (180psi)working pressure, version of the cooler which is dimensionally similar but has aluminium castings between the plates, on the standard cooler this is the weakest point where they are unsupported by fins or turbolaters, there is also thicker material in some areas. These coolers are about 18% heavier.
Weights and Measurements
The coolers are available in various heights and two widths, 115mm matrix or 235mm matrix, but only one, 51mm, measured from front to back. The height of the cooler is usually in rows, these are the number of oil passages including the top and bottom plates.