The pressure range of the plant's low-pressure gas source varies depending on the application and equipment requirements, but the following standards are generally followed:
1. Conventional Low Pressure Air Source Pressure Range
- pneumatic system:
- air compressor output pressure: Generally 0.6-0.8MPa(6-8kg), some high-efficiency equipment can reach 1.0MPa.
- Pressure adjustment with gas point: Usually adjusted to 0.4-0.6MPa to meet the needs of pneumatic tools, transmissions, etc.
- Centralized gas supply pressure: Set to 0.5MPa, taking into account economy and reliability.
- Steam system:
- low pressure steam: The national standard is 0.1-1.6MPa, and the common pressure in factories is ≤ 0.3MPa.
- chemical steam: Low pressure rating is usually ≤ 1.57MPa.
2. special application scenario pressure
- pneumatic valves and actuators:
- driving pressure: It needs to be ≥ 0.4MPa, and some high torque equipment requires 0.5-0.6MPa.
- Control signal pressure: The standard pneumatic signal is 20-100kPa(0.02-0.1MPa).
- pneumatic conveying system:
- low-pressure high-efficiency transmission for example, in the case of Weinan thermoelectric pneumatic conveying, the pressure is optimized to 0.2-0.4MPa to realize large flow and low energy consumption.
- Cooling and cleaning equipment:
- low Pressure Demand: The pressure is usually ≤ 0.3MPa to avoid damage to the workpiece or equipment.
3. pressure setting principle
- equipment adaptability: Adjust according to the rated pressure of pneumatic tools, valves and other equipment to avoid overload or inefficiency.
- Economy: Under the premise of meeting the process requirements, low pressure is preferred to reduce energy consumption and equipment loss.
- Security: It shall meet the pressure vessel specification (such as GB150), and the pressure level shall match the pressure bearing capacity of pipelines, valves and other components.
4. industry differences
- food & Beverage compressed air in direct contact with food should give priority to the control of oil content, and the pressure is usually set to 0.5-0.6MPa.
- Electronic Manufacturing the gas used for precision equipment shall be equipped with a pressure stabilizing device, and the pressure fluctuation shall be controlled within ± 0.01MPa.
- Chemical and Energy: Medium and low pressure steam (0.5-1.0MPa) is required for stirring and instrument control of some reactors.
Summary: The pressure range of the factory's low-pressure gas source is usually 0.1-1.0MPa, and the specific setting needs to be comprehensively considered in combination with equipment requirements, process specifications and economy. It is recommended to check the pressure stability regularly and optimize the gas supply quality through the pressure reducing valve, gas tank and other equipment.
