These kind of exchangers have been designed for mobile machines when the battery cannot supply enough electric energy to the motor of the DC fan or when the DC exchanger is not able to produce high thermic exchanges.
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.
The fans are metallic, and metallic are the protection grills used also to fix the hydraulic motor. Upon request, it is possible to receive the motor support, which helps the driving shaft absorbing radial stresses. Upon request, it is also possible to receive a thermo switch with IP 65 protection degree and different temperature ranges, 47°C or 60°C.
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.