Modern industrial systems operate under high loads, where every detail affects the reliability and service life of the equipment. One of the key elements of protection and stable operation is the oil cooler — a device that keeps the oil temperature within optimal limits and prevents the mechanisms from overheating.
What is an oil cooler and why is it needed
An oil cooler is a heat-exchange device designed to maintain oil temperature within an optimal range. The operating principle is simple: hot oil passes through the oil cooler–heat exchanger, where it transfers heat to air or water. At the same time, the pressure in the system does not drop and the equipment performance is preserved.
Oil cooling is critical for any industrial installation. When overheated, the oil loses viscosity — lubrication efficiency decreases, bearing and pump wear increases, and the risk of scuffing and component failure grows. In hydraulic systems, a temperature increase of 10 °C above the norm can shorten the service life of the equipment by almost one third.
A modern oil cooler is a key element in the protection system of mechanisms. Manufacturers design the devices in accordance with international standards ISO 6743-6 and GOST 17479.4-87, which define permissible operating temperatures, oil viscosity and requirements for heat-exchange systems.
Where oil coolers are used
Oil coolers are used in many industries where oil circulation is part of the technological process.
The most common applications are:
- Hydraulic power units – stabilizing the temperature of hydraulic oil during continuous operation.
- Turbine oil coolers – providing cooling of bearings and control components.
- Compressors – preventing overheating of rotors and seals.
- Internal combustion engines – oil coolers maintain the thermal balance at high speeds.
- Gearboxes, machine tools, presses – reducing wear of friction surfaces and oil degradation.
In every system, the oil cooler solves one task – it keeps the temperature stable. This reduces energy consumption, lowers maintenance frequency and extends the service life of the equipment.
In hydraulic power units and presses, hydraulic oil coolers are used, selected according to the flow rate and viscosity of the working fluid. In compressor units, water-cooled oil coolers are often used, operating efficiently at high ambient temperatures.
When designing such systems, engineers rely on ISO 4413, which specifies the requirements for hydraulic installations, permissible temperatures and types of coolers.
Types of oil coolers
There are several structural types of oil coolers that differ in cooling principle and field of application.
By cooling principle
Air oil cooler is the simplest and most common solution. Air is supplied by a fan through an aluminium radiator, removing heat from the oil flow.
Advantages:
- independent of water supply;
- easy installation;
- low cost of the oil cooler.
Disadvantages:
- reduced efficiency in hot climates;
- fan noise;
- need to clean the radiator fins.
Such an oil cooler for hydraulics is installed on mobile machines, presses, metal-cutting machine tools and hydraulic power units where autonomy is required.
A water oil cooler or oil cooler heat exchanger operates on the counterflow principle – oil and water move towards each other, providing efficient heat exchange.
Advantages:
- high heat transfer;
- stable operation under heavy loads;
- compact design.
Disadvantages:
- requires clean technical water;
- risk of corrosion if the fluid quality is poor.
Water oil coolers are used in turbines, compressors, diesel engines and generators. The designs comply with ISO 15547-1, which regulates the parameters of industrial heat exchangers.
In complex systems, combined oil coolers that integrate air and water cooling are used. There are also oil cooler heat exchangers with electronic flow control for precise temperature regulation – such models are used in power engineering and heavy machinery.
By application area
Each oil cooler is designed for specific operating conditions: pressure, oil type, heat load and temperature range.
| Type of oil cooler | Features | Application | Temperature range |
|---|---|---|---|
| Air oil cooler | Radiator with fan, aluminum housing | Hydraulic systems, mobile machinery, presses | 10 °C to +70 °C |
| Water–oil heat exchanger | Counterflow of water and oil | Turbines, compressors, diesel engines | 10 °C to +90 °C |
| Combined oil cooler | Combined air and water cooling | Power complexes, hydroelectric plants | 0 °C to +100 °C |
| Engine oil cooler | Resistant to vibration and pressure | Internal combustion engines, generators, transport | –20 °C to +120 °C |
If necessary, you can buy an oil cooler separately for system upgrades. For example, a hydraulic oil cooler is an optimal solution for hydraulic presses and machines where precise control of the working fluid temperature is important.
The correct selection depends on the oil volume, operating mode and ambient conditions. Manufacturers are guided by DIN 51524 and ISO 14001 standards, which define the requirements for reliability and energy efficiency of industrial installations.
Why choose Teplo-Polis oil coolers
Teplo-Polis is engaged in the production of oil coolers in Ukraine and the supply of heat-exchange equipment for industry. Over the years we have completed projects for enterprises in the power industry, metallurgy, mechanical engineering, petrochemicals and transport. The company’s products are used at dozens of production sites throughout the country and abroad.
Every industrial oil cooler supplied by Teplo-Polis undergoes multistage testing. Before being shipped to the customer, the equipment is subjected to hydraulic tests, which ensure stable operation even under extreme loads.
All products are supplied with data sheets, test reports and warranty obligations.
Modern machines and test benches are used in production to check tightness, heat-exchange efficiency and resistance to vibration. Every water-cooled oil cooler is checked for leaks, pressure and heat transfer calculation in accordance with EN 13445 and GOST 27590-2005 standards.
Special attention is paid to service. Before delivery, the company’s engineers select the configuration of the hydraulic oil cooler for the specific system, taking into account pressure, oil type and temperature conditions. The client receives not just equipment, but a complete engineering solution.
We provide:
- inspection of every unit before delivery;
- warranty and after-sales service;
- transparent communication and real-time technical support from our engineers.
We supply solutions used in the power industry and metallurgy.
And you receive equipment that has passed hydraulic testing.
Advantages of working with our company
When working with Teplo-Polis, clients get not just a supplier, but a partner capable of solving the complex task of oil cooling in any industrial system.
Key advantages:
- Tailored selection for each task. The engineers analyze the heat load, oil properties and type of equipment. This makes it possible to select an industrial oil cooler with the required capacity and heat-exchanger material.
- Engineering support and consulting. The technical department supports the project from calculations to commissioning, including personnel training.
- Work throughout Ukraine and abroad. Hydraulic oil coolers and steam-turbine oil coolers are supplied to power and engineering companies in Ukraine, Poland, Romania, the Czech Republic and the Baltic states.
- Full production cycle. All operations—from design to assembly—are carried out at our own facilities in Ukraine, which shortens delivery times and ensures quality control.
The company flexibly adapts solutions to the customer’s equipment: from compact systems for presses and machine tools to powerful cooling units for power plants and turbines.
How to buy an oil cooler
The ordering process is as simple as possible:
- Contact the engineering department via the feedback form or by phone.
- Provide the parameters of your system—oil type, pressure, temperature, operating mode.
- The specialists will calculate the optimal model and suggest design options: water, air or combined oil cooler.
After the parameters are agreed, an offer is drawn up taking into account lead times, delivery and service support.
Why it is important to choose the right oil cooler
Stable oil cooling prevents overheating, preserves viscosity and extends the service life of bearings, pumps and turbines. Even a small temperature excess can lead to oil degradation and costly repairs.
Teplo-Polis continues to develop the production of oil coolers in Ukraine, offering modern, reliable and tested solutions for industry. Every customer receives a ready-made engineering solution based on experience, standards and the real needs of production.
FAQ
- How do you calculate the capacity of an oil cooler?
The calculation is based on the thermal power of the system, the required temperatures, and the permissible pressure drop.
For precise selection, formulas according to ISO 5167 and the company’s specialized software are used. - Can an oil cooler be installed on an existing operating system?
Yes. A hydraulic oil cooler or a water-cooled oil cooler can be integrated into an existing line if there is a free circulation circuit.
The engineers will select an option that does not require shutting down the main equipment. - What is the difference between water-cooled and air-cooled models?
Air-cooled units are used for lower heat loads and do not require a connection to the water supply.
Water-cooled units have higher heat dissipation and are suitable for high-power installations. - How do you maintain an oil cooler?
Regular flushing of the channels, cleaning of the filters, and inspection of the condition of the connections is recommended.
Last Updated on by Микола Фролкин