SESINO > AIR-OIL heat exchangers > DC motor heat exchanger (APL)

DC motor heat exchanger (APL)

These type of exchangers are particularly suitable to cool oleo hydraulic systems of mobile machines, having fans at 12V or 24V to be connected to the battery of the machine.

The particular structure of the cooling element allows great thermic performances and pressure resistance. Maximum working static pressure: 20 bar; test pressure: 35 bar.

Out technical Department is available to suggest and find the better solution in case of particular working conditions, pressures, frequencies, vibrations, etc.

It is always recommended to assemble in parallel with the exchanger a by-pass valve to avoid extreme counter-pressures, particularly when the machine is started with cold oil. On the contrary, it is not useful to use a check valve as by-pass to protect the exchanger from pressure’s peaks, since the inertia of the valve itself is too high in comparison with the speed of the pressure waves that occur into the oleo hydraulic systems.

The flow rates shown in the tables are the ones recommended for the exchanger proper working.

The efficiency curves show the specific exchange capacity in kcal/ h°C or in kW/°C according to the different oil rates. To calculate the heat quantity the different exchangers are able to dissipate it is enough to multiply such capacity by the difference between the requested oil temperature and the summer room temperature.
We pay particular attention to the choice of our components in order to supply the customer with a reliable product.

Long lasting fans with IP68 electric protection and thermo switches with IP67 protection, available with two temperature ranges, 47°C or 60°C.

The thermo switch calibration shows the initial temperature of the fans, while the stop temperature is 11°C lower. We must consider that the tolerance on the above mentioned operating temperatures is ±5°C.

The electric system of these exchangers is already wired.
If the exchanger is equipped with thermo switch, the electric system has a relay integrated into the thermo switch itself.
The carbon steel parts are powder painted in order to resist to corrosive phenomena.

For the right calculation of air-oil heat exchangers, we supply our customers with a calculation program on CD-ROM or that can be downloaded from our website.

The air-oil heat exchangers can be used to cool other kind of fluids, which must be compatible with aluminium and its alloys.

However, for each use, with the exception of oil cooling, we recommend to consult our Technical Department.

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