Why do compressor valves fail?
Some mechanical causes of compressor valve failure are: Spring failure: A wear down of the spring attached to the valve, due to stress could cause the improper functioning of the valve. High-cycle fatigue: The compressor’s operation at high cycles over a long time can lead to stress which could affect the valve.
Why is a Copeland Discus compressor more efficient than a standard reed valve reciprocating compressor?
Copeland Discus is the industry standard for efficient and reliable semi-hermetic compressors. The patented Discus valve design provides up to 12% more efficiency than any reed compressor technology by reducing re-expansion volume thereby maximizing volumetric efficiency. Better efficiency = lower cost.
What is the purpose of valve plates in a reciprocating compressor?
Valve plates are used in a wide range of compressor applications across different gas compositions and operating temperatures, acting as seals between different pressure zones within the compressor.
Why do air compressors have plate type valves?
Plate valves are designed to withstand high pressure and dirty gas applications. Because plate valves are used in dirty gas applications, the valve disc must be resistant to any particles contained in these gases.
How do you diagnose a bad compressor valve?
Being able to recognize the symptoms of a faulty valve are essential, and Adeszko said problems can stem from a number of things. “The symptoms could be a loss of cooling or refrigeration, higher-than-normal suction pressures with low discharge pressures, the compressor being very quiet, or low amp draw,” he said.
How would you prove a leaking suction and discharge valve?
Discharge valve leaks are very easy to identify. Just close the suction service valve tight and observe the compressor low-side pressure (with the power off). A slow, steady rise, which also can be pretty rapid sometimes, to discharge pressure is conclusive evidence of a leaking or broken discharge valve.
What kind of damage do high compression ratios cause?
The greater the vertical distance between points #2 and #4, the higher the compression ratio, which means that low suction pressure or high head pressure may result in higher compression ratios, poor compressor cooling, lower efficiency, and lower capacity.
What is a discus compressor?
Discus compressors are refrigeration compressors used in supermarkets, walk-in coolers and freezers, and industrial applications. Capacity modulation reduces the suction pressure and temperature variation of the refrigerated space and provides for a decrease in the compressor’s cycling rate.