systemtrykk

Systemtrykk, or system pressure, is the pressure present within a closed system, resulting from the fluid or gas confined inside components such as pipes, vessels, or equipment. It is a key parameter in hydraulics, pneumatics, heating and cooling systems, water supply networks, and industrial processes. The term can refer to absolute pressure, gauge pressure (relative to ambient atmospheric pressure), or differential pressure depending on context and measurement convention.

Pressure is measured in units such as pascals (Pa) or bars, with gauge pressure commonly expressed as bar gauge (bar g) and absolute pressure as bar absolute (bar a). In practice, many domestic and industrial systems monitor gauge pressure, while calculations sometimes require absolute pressure.

Typical system pressures vary by application. Domestic water supply often targets about 2–4 bar, while residential heating systems may operate around 1–2 bar. Air compressors and pneumatic systems can run from several bar up to 8–10 bar or higher, and industrial hydraulics may use tens to hundreds of bar, depending on the task.

Regulation and safety are integral to managing systemtrykk. Pressure-reducing valves, relief or safety valves, expansion vessels, and proper piping design help prevent over- or under-pressurization. Monitoring with gauges or sensors enables control loops to maintain desired pressure levels and detect faults.

Measuring devices include manometers, Bourdon tube gauges, pressure transducers, and digital sensors, which can part of local readouts or integrated control systems. Accurate pressure management is essential to ensure performance, safety, and longevity of equipment and installations.