Hydraulic Oil Cooler Buying Guide

What is Need of Hydraulic Oil Coolers

Heat kills hydraulic systems so hydraulic oil coolers are used widely in numerous agricultural, mobile, manufacturing, and industrial settings. Several different types of oil coolers are suitable for hydraulic systems, with air and water cooler being the most common among all.

This guide throws light on the need of using hydraulic oil coolers along with the advantages as well as the parameters for selecting the best oil cooler.

Hydraulic Oil Cooler fan:

Hydraulic air fan is primarily a device used to cool down or lower the temperature of the oil used in industrial or more precisely in hydraulic applications.

Why use Oil Coolers:

The two ways of cooling the oil (heated by inefficiencies in hydraulic circuits) are:

1. The more hectic and costly process is to use enough oil so that the heat created will never become too great during a single discharge.
2. A better and more efficient process is to cool the oil so that the heat created will always be dissipated. This process allows the system to operate for unlimited periods and use less oil.

Components of a Hydraulic Oil Cooler

• Oil reservoir
• Cooling fan, radiator and mini hydraulic motor
• Relief valve
• Filter / radiator bypass valve
• Oil level sight glass
• Filter block indicator
• Suction elbow and pipe kit After mounting

Advantages of Hydraulic Oil Cooler

By using a hydraulic oil cooler, you can get a stable cooling and filtration performance irrespective of flow and duty cycle variations of the main hydraulic circuit. This further allows the cooler to be sized to match the heat load and not the maximum return flow of the main circuit.

A bigger advantage is that this cooler is completely separated from the pressures in the return line which could potentially damage the cooler. Also, maintenance can be performed on the filters without having to shut down the main system.

Selection Requirements before buying Hydraulic Oil Cooler

In order to correctly size a cooler, the following parameters need to be known:

• The amount of heat that needs to be removed from the system.
• The desired oil temperature.
• The supplied water temperature and ambient air temperature
• The exact flow required
• The desired oil to water flow ratio
• The viscosity of the oil

Maintenance Tips of Hydraulic Oil Cooler

Regular maintenance intervals based upon the surrounding and operational conditions should be maintained to verify equipment performance and prevent premature component failure.

a) Inspect the entire heat exchanger and motor/fan assembly for loosened bolts, loose connections, broken components, rust spots, corrosion, fin/coil clogging, or external leakage.

b) Most low horsepower electric motors do not require any additional lubrication. However, larger motors must be lubricated with good quality grease as specified by the manufacturer at least once in every 6-9 months.

c) Cleaning and inspection of the Fan blades is necessary during the regular maintenance schedule. When handling a fan blade care must be given to avoid bending or striking any of the blades. Fan blades being factory balanced will not work properly if damaged or unbalanced. The damage of the fan blades can further lead to vibration and severe damage to the heat exchanger or drive motor.

d) Coil fins that become flattened can be framed back into position. This process may require the removal of the coil from the cabinet.

e) Heat exchangers operating in an oily or dusty environment will often need to have the coil cooling fins cleaned. The Oily fins should be cleaned up by brushing the fins and tubes with water or a non-aggressive degreasing agent mixture.

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