Air cooler HPA

oilsmallwith AC motor

EMMEGI air-oil heat exchangers are used for cooling oil hydraulic systems using as the coolant ambient air that passes over the radiant by means of a fan operated by an electric or hydraulic motor. The cooler element, in high resistance aluminium alloy, is obtained by means of a braze-welding process carried out under vacuum. The particular configuration of the cooling pipes increase the turbulence of the fluid consequently of the exchange capacity; moreover, the presence of special jets on the cooler finning further improves the total transmission coefficient. The result is a very small, light and robust technologically advanced product. Compatible fluids . MINERAL OILS; HL; HLP. . WATER-OIL EMULSION. . WATER-GLYCOL. . Consults EMMEGI for other fluids. Technical specification of Cooler Element . Material: “long life” aluminium. . Operating pressure: 20 bar . Test pressure: 35 bar. . Max operating temperature: 120°c. . For specially “ aggressive” atmospheres contact EMMEGI. Installation The exchangers can be fitted in a horizontal position, respecting the minimum distance from the wall (see fig.1) so as to ensure a natural flow of cooling air. The exchangers is usually installed on oil tank return piping; it must also be protected from impacts and mechanical vibrations by supports and must be connected to the plant with flexible pipes. Avoid subjecting the exchanger to sudden changes in flow, hammering and pulsations that can cause irreversible damage to the element. We recommend installing a by-pass valve ( see fig.2 ) to protect the exchanger from over-pressure generated when the plants is started up due to high oil viscosity