2026-04-09Views：
Are oil-free air compressors really oil-free? What air purity grades does it have? Oil-free air compressors are generally used to produce various sensitive products, such as semiconductors, medicines, and food. In such applications, even small amounts of oil in the compressed air can have harmful effects on the product and even the human body.
What are the different air purity levels for oil-free air compressors?
Grade 0 oil-free and "technically oil-free" are usually used to mean that the compressor meets certain standards. While these terms are similar, they have key differences that, if not taken into account, can lead to serious consequences. To better understand all this, let's delve into the meaning of "oil-free:
grade 0 oil-free and "technically oil-free" indicate the cleanliness of the compressed air. There are significant differences between the two, which we will explain below.
The International Organization for Standardization (ISO) has developed global standards for compressed air specifically for industrial and commercial use. Compressed air can be sorted from ISO 0-5 levels according to air purity (determined by the number and size of particles per cubic meter of air). The original version of the ISO compressed air purity standard (1991) was compiled by the filter manufacturer. The standard defines five classes of oil concentration, of which class 1 is preferred.
ISO Class 1-Technically oil-free air
class 1 specifies an oil concentration of 0.01 mg/m & sup3; at 1 bara (14.5psia) and 20°C (68F), which meets this standard and is known at the time as a "technically oil-free solution". However, this standard was edited in 2001 and updated in 2010. The new standard sets limits for the total oil content (aerosols, liquids and vapours) and introduces a specific standard for the measurement of oil vapours.
ISO Class 0-Oil-free air
the new standard also adds a new category (Class 0) to meet more stringent air quality requirements. ISO Class 0 represents a high level of compressed air quality, which can guarantee 100% oil-free air.
What are the different air purity levels for oil-free air compressors?
There are also some erroneous claims in the industry, promoting oil-injected compressors with filters, calling them "technically oil-free" and claiming that the air quality is better than oil-free compressors. These claims are untrue and improper selection of the compressor may result in damage to sensitive products or equipment.
When choosing an oil-free air compressor, be sure to choose a 0-stage oil-free compressor instead of "technically oil-free". Oil-free compressors are usually much more expensive, but they are safer to use in sensitive applications. With Class 0 oil-free compressors, you can ensure that compressed air does not contaminate end equipment and products. When selecting oil-injected or oil-free air compressors, seek advice from a compressed air professional.
The main differences between screw air compressor frequency conversion and power frequency are reflected in the working principle, performance characteristics, energy efficiency, noise, maintenance cost, scope of application and investment cost. The following is a detailed comparison of these aspects: screw air compressor variable
The size of the working pressure of the machine tool is usually determined according to the specific model, process requirements and equipment performance, so there is no uniform standard value. However, based on publicly available information, the following general ranges of working air pressures for machine tools can be summarized: 1. common
The pressure range of compressed air for industrial use varies depending on the application scenario and the type of equipment, but there are usually the following standards: 1. General industrial pressure range General standard: The pressure of compressed air for industrial use is usually between 0.7 and 1.0 megapascals (MPa), which is suitable for most industrial scenarios.
There is a close and complex relationship between the power, exhaust flow and pressure of the air compressor, which affects the performance and efficiency of the air compressor. First of all, power is a measure of the energy required for the operation of the air compressor, which is directly related to the working condition of the air compressor motor.
There is indeed a relationship between the flow rate and the pressure of the compressor output, which is mainly reflected in the following aspects: the basic relationship between the 1. flow rate and the pressure affects each other: the flow rate and the pressure value marked on the compressor nameplate are measured under specific conditions, but the actual
In the electroplating factory, the air compressor has a wide range of applications. Electroplating is a process that uses the principle of electrolysis to plate a thin layer of other metals or alloys on the surface of certain metals, and the air compressor plays a key role in this process, mainly providing compressed air. Electroplating
In industrial production, air compressor as an important power equipment, its stable operation is directly related to production efficiency and product quality. However, air compressors often encounter the problem of jet water during use, which will not only affect the purity of compressed air, but also
Analysis of air compressor power source: technical characteristics and application scenarios of electric drive and fuel drive As the core equipment in the industrial field, the choice of power source is directly related to the operating efficiency, cost and environmental protection performance of the equipment. According to the current technical standards and
Analysis of the core role of frequency conversion screw air compressor As an important equipment of modern industry, its core role is to achieve the efficiency, stability and energy saving of compressed air supply through the integration of frequency conversion technology and screw compression technology. The following from
The vibration generated in the operation of the screw air compressor should be very small. If the vibration is large, you need to find out the reason. There are many reasons for the large vibration of the air compressor, such as the following: 1. The basic design and construction quality are not up to standard, resulting in insufficient rigidity,
2018 Granklin Group. All rights reserved 沪ICP备18000439号-2
