We in the selection of air compressor should pay attention to some principles, so as to be able to choose more suitable for our own, today in guangdong hand air compressor to need air compressor company, talk about the selection of air compressor when the attention to matters.
The safety of compressor operation should be considered.
Air compressor is a kind of machine with pressure work, work with temperature rise and pressure, the safety of its operation to the first place.The state implements a standardized "two-certificate" system for the production of compressors, namely, the production license for compressors and the production license for pressure vessels (gas storage tanks).Therefore, in the purchase of compressor products, to strictly review the "two certificates."Usually, the product quality assurance system of certified manufacturers is perfect, and there will be no big quality problems. Even if there are some problems, the manufacturers will be responsible for the three guarantees.
2, to consider the occasion and conditions of gas.
If the air space is narrow (Marine, vehicle), should choose vertical;If the occasion of gas has long distance change (more than 500 meters), should consider mobile;If the power supply is not available, the diesel engine driven type should be selected.If there is no running water, you must choose the air-cooled type.
In air cooling, water cooling two cooling methods, the user often wrong understanding that water cooling is good, in fact, it is not.Air cooling type accounts for more than 90% of small compressors at home and abroad. This is because air cooling is simple in design and water is not needed for use.And the fatal disadvantages of water-cooled compressor are four: there must be a complete upstream and downstream system, large investment;Short life of water-cooled cooler;In the north of winter also easy to freeze the cylinder;A lot of water is wasted in normal operation.
3. Consider compressed air quality.
General air compressor produced by the compressed air contains a certain amount of lubricating oil, and a certain amount of water, some occasions are forbidden oil and water, then not only to the compressor type should pay attention to, if necessary to add accessories.
Solution: one is to choose non - lubrication compressor.The compressor cylinders are essentially oil-free, and the piston rings and packing are generally ptfe.But this machine also has shortcomings, poor lubrication, high failure rate;Teflon is also a kind of harmful substances, food, pharmaceutical industry can not use;No lubrication compressor can only do gas transmission without oil, can not do without water.The second and common method is to add an air compressor (whichever it is) with a first or second stage purification device or dryer.This kind of device can make the compressor air not contain oil and water, make the oil content in the compressed air below 5ppm, which can meet the process requirements.
4, should consider the level of exhaust pressure and exhaust volume.
The exhaust pressure of compressors for general purpose aerodynamics is 0.7MPa, and the old standard is 0.8MPa.At present, there is a kind of air compressor with a exhaust pressure of 0.5mpa, which is unreasonable from the perspective of use, because the pressure margin is too small for the pneumatic tool, and the gas transmission distance is a little farther, so it cannot be used.In addition, from the point of view of design, this kind of compressor is designed as a first-stage compression, and the pressure ratio is too large, which will easily cause the exhaust temperature to be too high, resulting in carbon accumulation in the cylinder, leading to accidents.If the compressor used by the user is larger than 0.8mpa, it should be specially manufactured and cannot be forced pressurized to avoid accidents.
Air displacement is one of the main parameters of the air compressor, choose the air compressor to match with the required air displacement, and leave a 10% margin.If the air volume is large and the air compressor exhaust volume is small, the pneumatic tool a start, will cause the air compressor exhaust pressure greatly reduced, and can not drive the pneumatic tool.Of course, blind pursuit of large discharge capacity is wrong, because the larger the discharge capacity of the compressor with the larger the motor, not only the price is high, but also waste purchase funds, use will waste electric energy.