COSTANTE SESINO

United Kingdom

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This type of exchanger has been designed for use on movable machines where battery feed is insufficient or when exchangers with direct current supply are inadequate to produce high thermic yields. The radiative unit is of aluminium because this material is a very good conductor; providing high thermic yields and relatively compact over-all dimensions. Thanks to the particular construction of the radiative unit the exchangers of the series APL cope well with water hammer conditions which, at peak values, must not exceed the minimum allowable dynamic pressure of 20 bar. The

maximum allowable static pressure is of 35 bar. It is recommended to fit a by-pass valve to avoid extreme back-pressures, particularly when the equipment is started with cold oil. For good exchanger working practice some oil rates are indicated in the tables. A very low flow rate oil speed creates considerable yield losses whereas a flow rate in excess of the suggested maximum causes pressure loss and does not substantially increase the thermal yield. The yield curves indicate the specific exchange capacity in kcal/h°C or in kW/°C subject to the different oil rates. To calculate the heat quantity that different exchangers are able to disperse it is sufficient to multiply such capacity by the difference between the required oil temperature and the summer ambient temperature. All components have been carefully chosen to ensure a reliable product. Fans are metallic, as are the protection grids for the hydraulic motor. Upon request a motor support can be supplied which prevents the drive shaft from radial stress. A thermostat with IP 65 protection and calibrated 47°C or 60°C can be supplied. To determine the correct air-oil exchanger we can supply a calculation program on CD-rom; by completing certain data it is possible to determine the correct exchanger and to obtain all the necessary parameters. The air-oil exchangers can be used to cool other kinds of fluids compatible with aluminium. For all applications, with the exception of oil cooling, it is recommended to consult our Technical Department.
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