Then your company will need the compressor. Consequently, you will have to find a job and present it to your superiors with your proposals. Compressor selection – is responsible. Before you go shopping, you need to determine in advance what type of machine is suitable for your purposes.
1. What does the compressor do?
The compressor compresses the gas.
2. What type of gas needs to be compressed?
If the answer is – “Air”, then you need an air compressor. If you need to compress another gas, look for a gas compressor or any of the specific compressors. Separately emitting carbon dioxide compressors are used for liquid or solid carbon dioxide (carbon dioxide) and refrigeration compressors, which compress ammonia, freon, or other refrigerants and are used in refrigerators.
3. What performance or how much gas should be compressed per unit of time?
Сcapacity or flow rate and is measured in cfm or cfpm.
4. To what pressure must the gas be compressed?
(The initial pressure, usually atmospheric, and if not, then you have to ask yourself, what of?)
The final pressure is often referred to as the discharge pressure (outlet pressure, discharge pressure) and can be expressed as absolute, ie zero-based, and as excess, ie the atmospheric pressure correction. Measure the pressure in PSI.
5. What makes the compressor compress the gas?
This is the drive. The drive is usually electric or diesel. Major motive power, measured in kilowatts kilowatt (kW) or horsepower hp (HP), 1 HP = 0.74 kW, and turning speed, measured in revolutions per minute, (rpm). Important for the motor voltage, which is measured in Volts, (V), the frequency of the supply voltage, measured in Hertz, (Hz).
To obtain useful estimates, remember that for every 35.3 cubic feet per minute of performance of a general purpose compressor (pressure of 7 to 10 atm.), between 7 and 8 kW of installed capacity of the unit is needed.
6. Will it be the compressor traveler?
When answering this question, you choose between stationary and mobile compressors compressor station. Stationary compressors are shop installed for permanent seating, high performance model, on stand frame or base. The mobile compressor stations are mounted on the chassis and are moved around construction sites, road construction, the oil industry…
7. How does the compressor cool?
We were all taught in school that gas heats up during compression. Therefore, when the compressor releases large amounts of heat, it is necessary to eliminate the refrigeration system. Main varieties: air-cooled and water-cooled. For the latter, a contribution of recycled water is required, so the water flow per unit of time must be requested.
8. Does the compressor have air receivers?
If not, you may have to buy it separately. Air receivers smooth gas surge, provide compressed gas supply in automatic control suspension compressor stability.
In most cases, the optimum number of air tanks is 35.3 cubic feet per 70…140 cubic feet per minute. of the compressor
9. What is inside the compressor?
In most cases, it is the cylinders with pistons (piston compressor, of course) or a pair of screws (screw compressor), which are constantly driven by gas, reducing their volume. In general (with the same performance), the piston costs less noise, it is repaired more and more easily, and the screw – expensive, quieter, safer and cheaper.
10. With butter or without butter?
To improve the efficiency of the compressor clearance between the piston and the cylinder with a piston compressor and between the screws – in screw – usually oil-filled. Naturally, some of the oil is in the compressed air. For his department he used oil separators and filters. In cases where the oil content in the compressed air needs to be very low or oil free (dry) compressors are applied they are more expensive than usual and have less reliable or expensive high purity filter sets.