What material is the oil injection check valve made of?
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Recently, one of our reciprocating compressors experienced poor oil injection due to a damaged oil injection check valve, which in turn caused damage to the compressor’s piston assembly. I would like to ask what material the oil injection check valve is usually made of? Can too high a temperature cause damage? At what temperature does damage occur? Or it’s not actually a damaged check valve; rather, there is a problem with the oil injection system. How to determine which step is causing the problem. Since I wasn’t at the scene right away, I could only rely on the analysis provided by the maintenance staff, but I had doubts, so I came to ask for advice. I’m a beginner when it comes to working with equipment, and my wording may not be accurate; please correct me if there are any mistakes.
It seems to be stainless steel; further verification is needed
Due to its high pressure and strict sealing requirements, cast steel is generally used.
It must be stainless steel. You can remove the oil injection check valve and run the oil pump to see if oil comes out; if no oil drips, it’s likely a problem with the check valve. Our compressor has been in operation for two and a half years; the check valves have been repaired or replaced several times, but we have never encountered any problems with the oiling system. I’m a beginner too; I hope this helps you
You should first check whether the oiler is filling with oil Next, the check valve is inspected; it is usually made of stainless steel
Previously, I built my own device to check the oil injection pressure of the injector; it allowed me to test the pressure applied by the individual oil injection pumps through connectors. The principle is very simple: it consists of a connector, a section of oil pipe, and a pressure gauge at the top. Just connect it when you need to take a measurement. Start the oil injector, and determine the pressure generation capacity of the oil pump based on the pressure shown on the gauge. When checking the oil supply connection pipe, first verify whether it is unobstructed, and then check for any leaks. The temperature of the oil injection pump generally does not get too high; if it does, this is usually indicated by issues with the oil injection connector, which means that it no longer functions as a check valve, and the oil injection connector needs to be replaced. The inspection of the oil filling connector is mainly carried out before installation. One aspect to check is the depth to which the screws are tightened; if they are tightened too far, there will be no room for movement, while if they are tightened too loosely, the sealing requirements will not be met. In the past, we would use wire to conduct this inspection and adjust it based on the amount of force applied ； Secondly, after adjustment, it is necessary to secure the screw in place; this can be done by using interlocking mechanisms or welding to prevent accidents caused by the screw loosening during operation. Loose screws can affect oil injection and the check function; in severe cases, the screws may fall into the cylinder, causing equipment failures. Personal opinion, for reference only!
It’s necessary to check whether it’s an oil quality issue that prevents the check valve from opening properly~~