The extent of the bar unit’s prevalence in factory production
In modern factory production,barThe bar is a widely used unit of pressure. Whether in compressed air systems, hydraulic drives, or pressure monitoring across various fluid‑carrying pipelines, it is one of the most familiar units to engineers and technicians. Particularly within European standards and industrial systems influenced by them, the bar has become virtually the default unit for pneumatic and conventional fluid‑pressure measurements.
Why do factories tend to use bar as the unit of pressure?
The factory has chosen the bar as its primary pressure unit, primarily based on the following practical considerations in production:
- Numerical values are intuitively moderate.1 bar is approximately equal to one standard atmosphere. In typical industrial pneumatic systems, the working pressure usually ranges from 6 to 8 bar; using bars helps avoid excessive decimals or unwieldy whole numbers, making it easier for field personnel to read and remember values quickly.
- Metric system compatible: The bar is a metric unit of pressure; when used in conjunction with other metric units such as length and volume, it simplifies the calculation of physical quantities and engineering derivations.
- Industry Equipment Standards: On the market, the factory nameplates of a large number of standard air compressors, pneumatic valves, and pressure gauges are either set by default to display bar or show bar alongside other units, thereby establishing deeply entrenched industry conventions.
Specific applications of bar in common industrial equipment
In the day-to-day operations of a factory, the bar unit is integral to numerous core processes:
- Air compressor systemAir compressors are one of the primary power sources in factories, and their discharge pressure as well as the set pressure of the air receiver tank are typically adjusted and monitored in bar.
- Pneumatic actuatorThe rated operating pressure of actuators such as cylinders and pneumatic motors is typically specified in bar, helping technicians select an appropriately matched air supply pressure.
- Pipes and ValvesIn the monitoring of actual operating pressures, pressure gauges for various water and gas pipelines, as well as control valves, typically use bar as the primary scale.
Conversion of bars to other common pressure units
To verify parameters across different technical standards and equipment, it is essential to understand the conversion factors between the bar and other units:
- bar and MPa: 1 bar = 0.1 MPa In many domestic special-purpose equipment and high-pressure systems, MPa is more commonly used, and the conversion between the two units is very straightforward.
- bar and psi: 1 bar ≈ 14.5 psi Psi is an imperial unit of pressure and is used in some imported equipment or specific industry standards.
- bar and kPa: 1 bar = 100 kPa In low-pressure ventilation or when measuring small pressure differentials, kPa is used quite frequently.