Technical Specifications:
The document provides technical data for multitubular heat exchangers used for cooling oil, water, or fuel with untreated or sea water. The models discussed include G058-xxx-1/NC52 and G058-xxx-1/CC32.

Dimensions and Materials:
- Core lengths are specified for different models: 116 mm, 175 mm, and 235 mm.
- Materials used include Copper-Nickel for tubes, Brass for tube plates and water connections, Aluminium for baffles, and Viton for O-rings.
- Water connections vary between Brass Ø52mm and Reinforced plastic Ø32mm.

Working Characteristics:
- Maximum working pressure and temperature are specified, with a maximum water flow rate of 145 L/min.
- The heat exchangers are designed for specific heat transfer rates, with performance data provided for different oil flow rates (Qoil) and water flow rates (Qw).

Design and Geometry:
- The exchangers feature a multitubular design with specific geometries for different models.
- The number of passes on the cold side and the core diameter are specified.

Performance Data:
- Graphical data illustrates specific heat transfer rates (KW/°C) against oil flow rates (Qoil) for different models.
- The document includes performance metrics such as Qmax, Qmin, and pressure drop (DPoil) for oil and water inlets.

Applications:
- These heat exchangers are suitable for marine gearbox oil coolers, with specific models like G058-235-1, G058-175-1, and G058-116-1 highlighted.

Version Information:
- The document is from version 11/2017.