Technical Specifications
The document provides technical specifications for the HY 235 series of air-oil heat exchangers manufactured by OESSE S.r.l. Key parameters include oil flow, capacity, weight, displacement, motor flow, power, fan diameter, air flow, and noise level. Two models, HY23505 and HY23506, are detailed with specific values for each parameter.

Performance and Efficiency
The performance section outlines the relationship between oil flow and pressure drop, with a graph indicating how pressure drop varies with oil flow rates ranging from 0 to 360 l/min. Viscosity correction factors are provided for different oil types (ISO VG @ 40 °C), with multiplication factors ranging from 0.7 to 2 depending on the oil's viscosity grade.

Noise and Power Conversion
The noise level for the HY23505 model is specified at 85 dB(A). Additionally, a conversion metric is provided, indicating that 1 kW equals 860 Kcal/h or 635 HP, which is useful for understanding the heat exchanger's performance in different units of measurement.

General Information
The document notes that the technical data are not binding, suggesting that specifications may be subject to change. The information is presented in three languages: Italian, English, and German, reflecting the international scope of the product's application.