@air
2025-04-11
Is the pressure at the gas producing end and the gas consuming end of the air compressor the same?
Pressure at the gas producing end and gas consuming end of the air compressoroften inconsistent, the pressure at the gas consumption end will be lower than that at the gas production end, and the specific difference is determined by the following factors:
1. Principle of pressure loss
When compressed air flows in pipes, a pressure drop will occur due to the following reasons:
- friction loss
- Roughness of the inner wall of the pipe, number of joints (for each additional elbow ≈ increased pressure loss by 0.5-1bar).
- example: Pressure loss of 100-m-long galvanized steel pipe (DN50) is about 0.3- 0.6 bar.
- leakage loss
- Poor sealing of pipe joints and leakage on flange surfaces (each leak is reduced by 0.1- 0.3 bar).
- Air storage tank charging and discharging
- When the capacity of the gas storage tank is insufficient, the peak pressure drop of the gas consumption can reach 1- 3 bar.
2. Typical differential pressure range
| conveying distance | pipe material | Pressure difference (gas producing end-gas consuming end) |
|---|---|---|
| <50m | stainless steel | 0.2-0.5bar |
| 50-200m | galvanized steel | 0.5-1.5bar |
| >200m | plastic tube | 1.5-3bar |
3. Pressure compensation measures
- Add air storage tanks
- Capacity recommendation: Air compressor displacement ×3-5 times.
- Effect: Buffers pressure fluctuations and reduces instantaneous pressure drops.
- Configure booster valve
- A booster pump or booster valve is set at the gas end to increase local pressure.
- Optimize pipeline design
- If large diameter pipes are used (such as DN80 instead of DN50), the pressure loss can be reduced by 40%.
- Reduce the number of elbows and use simple-bending technology to replace right-angle joints.
4. Monitoring and verification
- install pressure gauge: Set pressure gauges at the gas production end, gas storage tank outlet and gas consumption end respectively.
- pressure recorder: Continuously monitor the pressure curve for 24 hours to identify leak points or bottleneck sections.
Note: It is recommended to configure a separate pressure reducing valve for precision equipment (such as pneumatic instruments) to ensure that the pressure at the gas end is stable within the equipment requirements.
