OEM:Water to Oil Cooler Selection

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PERFORMANCE REQUIREMENTS
The following information is required to select a water to oil cooler.
Type of Application	Seawater Freshwater Other:
Heat Load	The heat load may be determined by: A. Hydraulic oil cooling: Assume 30% of the input power will be rejected to heat. B. Hydrostatic oil cooling: Assume 25% of the input power will be rejected to heat. C. Automatic transmission oil cooling: Assume 30% of engine power will be rejected to heat. D. Engine oil cooling: Assume 10% of engine power will be rejected to heat. kW hp (tick correct unit)
Oil Flow Rate - Shell Side	This is simply the flow rate of the oil circulating through the cooler. litres/minute
Water Flow Rate - Tube Side	This is the flow rate of the water circulating through the cooler. litres/minute
Oil Type	Advise oil grade or viscosity vs temperature details. (eg ISO 68)
Maximum inlet oil temperature	Oil coolers are typically sized using the maximum desired oil temperatures. Typical temp. ranges are: Hydraulic oil 43 - 54°C Hydrostatic drive oil 54 - 82°C Bearing lube oil 49 - 71°C Lube oil circuits 43 - 54°C °C
Maximum inlet water temperature	Maximum water temperature is the maximum temperature of the available water. °C
Maximum allowable oil pressure drop	Most systems can tolerate a pressure drop through the heat exchanger of 1.5 to 2 Bar. Excessive pressure drop should be avoided. Care should be taken to limit pressure drop to 0.3-0.5 Bar for case drain applications where high back pressure will blow out pump shaft seals. Bar PSI
Maximum allowable water pressure drop	The maximum pressure drop that can be caused by the cooler in the water circuit. Bar PSI
Are any cylinders or other pressure spike producing components in the cooler circuit?	Click for more information No Yes, give details:
What is the power source and how much power is needed to drive the hydraulics or the heat source?
Any additional information about your circuit or environment that will help with the selection of your cooler.

MORE INFORMATION
Cylinders or other pressure spike producing components Do not install aluminium oil cooler elements in circuits where sudden changes of pressure or oil flow are likely to occur. Eg:- Cylinder circuits or circuits with oscillating valves. Use of this type of cooler in such circuits will result in rupture of the tubes or cracking of tube to header joints. Aluminium is also subject to fatigue failure under high frequency pressure and/or temp cycling. Bypass relief valves or accumulators are not effective against pressure spikes. For these applications refer to DP & HL off-line coolers. Back to form