How to calculate the gas consumption of bottle blowing machine

The calculation of the gas consumption of the bottle blowing machine should be combined with the working principle of the equipment, production efficiency and actual gas demand to ensure that the capacity of the air compressor matches the bottle blowing process. Granklin water lubricated single screw air compressor can provide reliable air supply for bottle blowing machine by virtue of stable pressure output and oil-free cleaning characteristics. The specific calculation method is as follows:

the core calculation logic of the gas consumption of the 1. bottle blowing machine.

The bottle blowing machine inflates the preform by compressed air, and the air consumption mainly depends on the following factors:

1. Gas consumption of a single bottle (V)

refers to the volume of compressed air required to inflate a bottle (unit: liters/bottle). This value is usually provided by the bottle blowing machine manufacturer or obtained by actual measurement (e. g. using a flow meter). If it is not possible to obtain accurate data, refer to the experience value of similar equipment (for example, the air consumption of common PET bottle blowing is about 5-15 liters/bottle).

2. Production speed (N)

refers to the number of bottles produced by the blowing machine per minute (unit: bottles/minute). If the equipment is multi-station synchronous operation, the total production speed needs to be multiplied by the number of stations (e. g. 4 station equipment, each station produces 10 bottles/min, the total speed is 40 bottles/min).

3. Calculation formula of gas consumption

the total gas consumption (Q, in cubic meters per minute) can be calculated by the following formula:
Q =(N × V)÷ 1000
(Note: 1 cubic meter = 1000 liters, the liter needs to be converted to cubic meters)

precautions in 2. Actual Calculation

1. Pressure correction (if required)

the bottle blowing machine usually requires a compressed air pressure of 2.5-3.5MPa (subject to equipment requirements). If the gas consumption is expressed by volume under standard atmospheric pressure (0.1MPa), it shall be corrected according to the actual pressure:
actual gas consumption (Q actual) = Q × (actual pressure ÷ 0.1)
(Example: When the pressure is 3MPa, Q actually = Q× 30)

2. Reservation of margin

in order to cope with pipeline leakage, gas fluctuation or future capacity increase, it is recommended to increase 10%-20% margin on the basis of total gas consumption:
recommended air compressor capacity = Q actual ×(1.1-1.2)

adaptability of 3. Granklin Air Compressor

granklin water lubricated single screw air compressor can accurately match the gas demand of bottle blowing machine through the following characteristics:

• stable pressure output: The structure of the single-screw plus star wheel plate runs smoothly, with low friction and low pressure fluctuation, ensuring stable gas consumption during the bottle blowing process and avoiding bottle forming defects due to insufficient pressure.
• Oil-free clean gas source: Water lubrication replaces traditional oil lubrication, completely eliminates oil pollution, and meets the requirements of the bottle blowing machine for compressed air cleanliness (especially suitable for food, beverage packaging and other scenarios that are sensitive to hygiene standards).
• Flexible Capacity Matching: The output power can be adjusted by variable frequency drive technology to adapt to the gas demand of the bottle blowing machine at different production speeds and reduce ineffective energy consumption.

4. example description

assuming that the bottle blowing machine is a 4-station equipment, each station produces 12 bottles/min, and the gas consumption of a single bottle is 8 liters:

• total production speed N = 4 × 12=48 bottles/min
• total gas consumption (under standard pressure) Q = 48 × 8 ÷ 1000=0.384 m3/min
• if the actual pressure is 3MPa,Q actual = 0.384 × 30=11.52 m3/min
• after reserving 20% allowance, it is recommended that the capacity of the air compressor be ≥ 11.52 × 1.2 & asymp;13.82 m3/min

to sum up, the calculation of the gas consumption of the bottle blowing machine should be combined with the production speed, the gas consumption of a single bottle and the pressure requirements, and the appropriate margin should be reserved. Granklin water lubricated single screw air compressor can provide reliable gas source guarantee for bottle blowing process through stable output and oil-free cleaning characteristics.