|一般管路的損失約為0.5 kg/cm²，壓縮空氣通常須經清淨化系統處理，透過管路進行熱交換的乾燥，或透過過濾器，進行清淨的程序，都會產生壓力降，大概是 0.3~0.5 kg/cm²(過濾器＋乾燥機)。|
|While you are planning to own a air compressor system, asides from the purchasing expense, saving electricity cost, increase its life span, provide stable pressure, and decrease its noise and pollution are some questions customers has always been wondering with. Therefore, it is important to evaluate all important factors before purchasing the air compressor system. Here are the ten important factors that customers should evaluate before purchasing:|
|1.||Main Purpose of compressing air|
|Most users seldom think to operate in different usage for different parts of the system. Many users would apply the same input and output for all functions, in results with too much money are being waste.|
|Every part of air’s maximum and minimum pressure should be well evaluated. Also, the pressure between transferring pipe and cleaning system’s pressure need should be calculated, so then the amount of air being discharged can be fixed. General pipes’ loss is approximate 0.5 kg/cm². During the cleaning process after the air being compressed, it has to go through the dryer or the filter, which usually causes the pressure decreases, approximate at 0.3~0.5 kg/cm² (Filter & Dryer).|
For majority, customers decide the product by its horsepower. The truth is, the wind power is more accurate to choose the model you need. Users should choose the model according to the maximum and minimum wind power requirements, so that each section of the air usage and discharge will be equal.
“Base load” uses centrifugal type or screw type
“Fluctuating load” uses multi screw type along with variable-frequency type
“Momentary load” uses high pressure air compressor and big size air tank
There are some factors that users should be aware of about the amount of air discharge:
(A) Current requirement
(B) Estimation of leakage amount
(C) Future expanding plan
(D) Tolerance using
Just like water for washing hands and for drinking, the cleaning process is different, air compressor also has different process according to different quality requirements. Usually we categorize compressed air as PA, IA, BA, and SPA. According to ISO 8573-1 compressed air’s quality standard, choosing different models and class of dryer and high precision filter, will results with different quality of air. Therefore, for not letting the good quality resource became wasted and affects the process, it is important to choose the most suitable devices and machines.
With the different design of air compressors, it can be separate as with and without oil.
With oil: Oil is used to lubricate inner part of air compressor. Although it has a rarely little oil, but it is still perfectly fine for general industry users.
Without oil: Parts for without oil models will lubricate itself by its own part design. Therefore, it will be 0% oil contain. It is suitable for: high precision industry, medical industry, food industry, semi-conductor industry, painting and coating industry.Models of air compressor that has oil with it, will contain problems such as slop oil, oil stain, and water with oil leaking. It is important to strictly follow the instructions and policies of environmental protection.
|In the early days before 1980s, air compressor operated by simply on/off button controls for each device and machine. In the 1990s PLC became popular, operating became easier with multi orders. As year 2000 arrived, variable-frequency operating became the new innovation that contains operating digitally technics that could saved at least 30% of electricity and resources. The technics of variable-frequency operating provided stable pressure at ±0.1bar when it is full load.|
|When the performance matches the designing point, the efficiency can be guarantee at its best. However, when its further to the designing point, its efficiency will decrease. It is proved that when choosing the right air compressor, performing cost can be easily saved.|
|7.||Installation and Ventilation|
|Comparing to air-conditioners, air compressor is more inexpensive, durable with lower requirements, so most factories would install it at the corner with bad environment condition such has too humid, too hot, too dusty and other horrible conditions. Installing air compressor in a bad environment condition can negatively affect not only its performance, but also energy saving efficiency. Area size, ventilation environment condition, noise isolation, waste water and heat are some factors that can directly affects to the using of resources. Comparing with distributed systems, centralized system has lower cost in installing, maintain & repair, monitoring, operating, and other accessories.|
|There are two types of cooling method for air compressor: air cooling and water cooling. It is suggested that under 200hp should use air cooling; for the models that are above 200hp should use water cooling. Although air cooling doesn’t have to invest on extra accessories such as water pump or cooling tank, but it is required to have a ventilation environment condition. On the other hand, water cooling type’s performing temperature won’t affected by environment’s temperature, which benefits the life span of air compressor, but icing burst and block up are the main disadvantages.|
|9.||Electric Power Type|
Different countries have different ways of providing electricity, and also having different voltage, frequency, and restriction on electric using. While users are purchasing the air compressor, it is required to provide the types of voltage, frequency, and the amount of phase power users are using. Voltage need and stability when voltage decrease referring to the motor of air compressor’s electric power using, usually it can be separate in two types:
Single Phase: Suitable for 110V, 220V. For safety, below 1hp uses 110V, above 1hp but below 5hp uses 220V.Three Phase: Suitable for large hp machines. Low voltage system for 380V to 460V. Air compressor with 600hp and above is recommend to use high voltage system (3kV to 10kV)
|10.||Repair and Maintenance|
|It is important that parts and consumable parts should be replaced with original factory’s manufactured, rather the using cheap parts from other unqualified factories. The maintenance principle is based on the SOP management of air compressor. Position of air compressor should have extra space area for maintaining, hanging accessories, and for engineers to easily walk in and out. The person who operates and maintain should take different professional lessons according to their duty.|
選用空壓機的十大考量因素 Ten Important Factors when Choosing an Air Compressor