Có nên thay máy nén khí cũ?

Chúng ta hãy bắt đầu bằng cách nhìn vào một chiếc xe hơi. Khi bạn lần đầu tiên lái xe với một chiếc xe hoàn toàn mới, không có gì phải lo lắng và ý nghĩ mua một chiếc xe khác không làm bạn bận tâm. Khi năm tháng trôi qua và sự cố, cùng với việc bảo trì tăng lên, xảy ra thường xuyên hơn, người ta bắt đầu đặt câu hỏi liệu chi phí đó có quá cao để duy trì không? hay sẽ thay xe hoàn toàn mới . Giống như với ô tô, điều quan trọng là phải chú ý đến các yếu tố khác nhau sẽ chỉ ra rằng, sự cần thiết phải thay thế máy nén khí của bạn.

Vòng đời của máy nén khí tương tự một chiếc xe hơi, khi còn mới, hiệu suất vượt trội, bạn sẽ không nghĩ đến việc thay mới, một khi máy đã cũ và hiệu suất kém, sự cố xảy ra thường xuyên, chi phí bảo trì cao hơn và ảnh hưởng đến sản xuất, lúc đó bạn sẽ nghĩ đến việc thay thế một máy nén khí mới.

Whether you need to replace your air compressor or not will depend on many variables that we will cover in this article. Let’s take a look at some indicators that could lead to the potential need of air compressor replacement.

Shutdown

One of the easiest indicators that your compressor is experiencing problems is a simple shut down during operations. Depending on the season and or weather conditions, your air compressor could be shutting down due to high ambient temperature and overheating. The cause of high temperature could be as simple as clogged coolers that need to be blown out or dirty air filters that need replacement, to a much more complex internal problem that would need to be addressed by a certified compressed air technician. If the shutdown can be taken care of by blowing out the coolers and changing out the air / inlet filter, then replacement would not be necessary, it is a simple matter of keeping up with the maintenance of the compressor. However, if the problem is internal and is caused by a major component failure, you will have to weigh out the costs of repair vs new replacement and make a decision that is in the best interest of your company.

Pressure drops

If your facility is experiencing pressure drops, it could indicate a variety of issues that should be addressed as soon as possible. Oftentimes, air compressors are set to a higher pressure setting than what is required for standard operations. It is important to understand the pressure settings for end users (machines that utilize compressed air for their operation) and set the air compressor pressure according to those needs. Machine operators are normally the first ones to notice pressure drops, as the result of low pressure can shut down the machine they are working on or result in a quality issue of the product being manufactured.

Before considering to replace the air compressor due to pressure drops, you should have a full understanding of your compressed air system and ensure that no other variables / obstacles are contributing to the pressure drops. It is important to inspect all your in-line filters to ensure that the filter element (cartridge) is not fully saturated. Furthermore, it is important to inspect your piping system to ensure that the diameter of the pipe is appropriate for the length of the run as well as the capacity of the compressor (HP or kW). It is not unusual for small diameter pipe that is extended for longer distance to create pressure drops, ultimately affecting the end users (machines).

(add sizing chart for diameter of pipe and flows)

If the filters and piping system check out ok and the pressure drops still occur, this might indicate that the compressor is undersized for the current need of the facility. This is a good time to check and understand whether any additional pieces of equipment have been added and or if production needs have increased. If the demand and flow requirements have increased, the current compressor will not be able to keep providing the facility with adequate flow at the needed pressure, therefore resulting in pressure drops across the system. In this case, it is best to contact a compressed air sales professional to perform an air study in order to gain a better understanding of your current air demand and size an appropriate unit to handle the new and future requirements.

Age of Compressor / Breakdowns

Air compressors are just like any other machine and at times they come the end of their life / operation cycle due to its age and or condition. Depending on the extent of the breakdown and needed repairs, it is important to perform due diligence and decide whether it makes sense to continue pouring money into a leaky bucket or to invest into a new and more efficient unit. Oftentimes, one problem can lead into more breakdowns, ultimately costing you more money than it would take to purchase a new, reliable air compressor. With the compressor being a heart of most manufacturing / industrial operations, it is important to perform scheduled maintenance in order to extend its operational lifecycle. Ultimately, it is smart to request a repair quote as well as a new compressor quote in order to compare pros and cons that should help with the decision making process.

Piston air compressors a great option as an entry level compressor, but oftentimes facilities either outgrow the unit or are unable to deal with the negative effects of piston compressors. If you need a consistent and or increased flow (CFM) and are looking for something that is compact, efficient, reliable and quiet, going with a rotary screw would be a great option. It is quite frequent for a company to start out with limited need for compressed air, but as production / customer demand increases, so does the need for increased output and larger compressor that can handle the demand and increased duty cycle. It is important to understand the difference between a piston and rotary screw air compressors and the capabilities of each technology (click here to learn more about difference between piston and rotary screw air compressors). It is easy to over or undersize your next compressor, which is why reaching out to a compressed air professional is encouraged and preferred.