Oil-free air compressor is easy to use and durable brand choice

Granklin air compressor is the first choice. The air compressor produced by Granklin Group adopts water lubrication, the whole machine is made of stainless steel, and the compressed gas is 100% free of oil.

The traditional method of determining the compressed air requirements of a new air compressor is to add up the gas consumption (m3/min) of all gas-using equipment, and then consider adding a safety, leakage and development factor

generally, the output pressure of the air compressor in the industry is 0.69MPa(G), and the pressure at the point of use of the equipment is at least 0.62 MPa. This shows that the typical air compressor we use has an unloading pressure of 0.69 MPa(G) and a cylinder loading pressure of 0.62 MPa(G), or system pressure. With these numbers (or the unload and load values of a certain system) we can determine.

If the cylinder pressure is at the nominal loading point (0.62 MPa(G)) or does not gradually increase to the unloading pressure (0.69 MPa(G)), more air may be required. Of course, always check to make sure that there are no major leaks and that the compressor unloading and control systems are operating normally.

If the air compressor must work at a pressure higher than 0.69 MPa(G) to provide a system pressure of 0.62 MPa(G), it is necessary to check that the pipe size of the distribution system may be too small, or how much more air needs to be added to the air consumption at the choke point, what is the impact of system air leakage, and how to determine the size of the air storage tank to meet the intermittent air consumption peak requirements.

1. test method-check the existing air compressor capacity

the timing pumping test is a relatively easy and accurate method to check the air volume or output of the existing air compressor, which will help to determine that the shortage of compressed air in the air compressor is not caused by the wear or failure of the machine.

The following is the procedure for the timed pumping test:

A. Gas tank volume, cubic meters

B. The volume of the pipeline between the compressor air storage tanks is cubic meters.

C.(A and B) Total volume, cubic meters

D. Full load operation of the compressor

E. Close the air valve between the air reservoir and the plant air system

F. The gas tank is abandoned and the pressure is reduced to 0.48 MPa(G)

G. Close the bleed valve quickly

H. The time required for the air storage tank to pump air to 0.69 MPa(G), seconds

now that you have the data needed to determine the actual gas volume of the existing compressor, the formula is:

C=V(P2-P1)60/(T)PA

C = compressor capacity, m3/min

V = volume of reservoir and piping, m3 (Item C)

P2 = final load pressure, MPa(A)(H item PA)

P1 = initial pressure, MPa(A)(item F PA)

PA = atmospheric pressure, MPa(A)(0.1 MPa at sea level)

T = time, s

if the calculation results of the test data are close to the rated air volume of your factory air compressor, you can be more sure that the load of your factory air system is too high, which requires an increase in air supply.

2. estimation method

V = V gas consumption of existing equipment v gas consumption of post-treatment equipment v leakage v reserve

3. determine the required increase in compressed air

according to the air compressor system pressure to increase to the required pressure of the amount of air, you can determine the need to increase the air compressor compressed air supply.

P2

required m3/min = Existing m3/min

P1

in the formula, the required m3/min = the required compressed air supply volume

existing m3/min = existing compressed air supply

P2 = required system pressure, MPa(A)

P1 = existing system pressure, MPa(A)

m3/min required = m3/min required-existing m3/min

the result tells you how much gas you need to add to meet your existing gas demand. It is recommended to increase the amount of gas to not only meet the current gas requirements, but also take into account the demand for incentives and leakage factors.

Influence of air leakage in 4. system

insufficient air supply is often due to or must be due to system leakage, air system leakage loss of power of a continuous source, so it should be best to make it as small as possible. Several small leakage points equivalent to 1/4 inch small holes may leak up to 2.8 M3 of compressed air under a pressure of 0.69 MPa, which is equivalent to the loss of air volume of an 18.75Kw air compressor. Based on the power 0.4 yuan per degree and 8000 hours of operation per year (three shifts), the leaked air will cause you to lose 60000 yuan in vain.

Most factories will provide maintenance personnel and parts to build leaks. Damaged tools. Valves, packings, joints, dropper and hoses should be checked and repaired in time.

Leakage of the entire system of the plant can be diagnosed by measuring the time required for the system pressure (on the upper side of the gas cylinder) to drop from 0.69 MPa(G) to 0.62 MPa(G) without gas supply. Using the pump test, we can calculate the leakage of the whole system:

V(P2-P1)60

leakage m3/min =

90(PA)

if the leakage green exceeds the 5% of the gas volume of the entire system, a leak must be built.