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Installation and Maintenance of Oil Coolers
Release date:
26-04-15
Oil coolers are widely used oil‑cooling devices in power systems and are also suitable for applications in metallurgy, chemical processing, mining, light industry, and heavy industry. Now, let’s take a closer look at the installation, operation, and maintenance of oil coolers.
Oil coolers are widely used oil‑cooling devices in power systems and are also suitable for applications in metallurgy, chemical processing, mining, light industry, and heavy industry. Now, let’s take a closer look at the installation, operation, and maintenance of oil coolers.
1. Install the oil cooler correctly, ensuring that the inlet and outlet pipelines are connected in the proper relative positions. Typically, it should be installed on the system’s return line or in a system operating at a pressure lower than the design pressure, with the oil-side pressure maintained higher than the water-side pressure.
2. Flanges for inlet and outlet pipelines and mounting base bolts shall be assembled on site.
3. All pipe flanges and valve sealing points shall be tightly sealed with no leakage.
4. Prior to commissioning the oil cooler, the piping shall be cleaned to prevent debris from clogging the cooling tubes.
5. When commissioning the oil cooler, first slowly open the inlet oil valve and the air‑vent valve (at the air‑bleed angle) to purge all air from the shell; then close the air‑vent valve, open the outlet oil valve, fully open the cooling‑water outlet valve, and slightly open the top water‑side air‑vent valve. Once the air has been completely vented, close the air‑vent valve. Adjust the outlet water valve according to the oil temperature at the cooler outlet (when opening the cooling‑water valve, increase the flow gradually), and regulate the system to maintain normal oil temperature.
6. If air remains trapped inside the heat exchange tubes, it will result in poor heat transfer performance.
7. During the severe winter season, when the oil cooler is shut down, all cooling water must be drained to prevent equipment from cracking due to freezing.
8. When the oil cooler is out of service, close the oil‑water inlet valve and the oil‑water outlet valve in sequence, loosen the plugs at the drain and oil‑drain ports, and completely drain the water and oil from the cooler.
9. The cooler should be cleaned approximately once a year using kerosene (or gasoline) to flush the cooling tube bundle, end covers, and shell; prior to reassembly, a leak‑tightness test at 1.25 times the design pressure must be performed.
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