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Pressure 

Pressure describes the physical force exerted on a medium per unit of area. In pump technology, pressure significantly influences the flow rate and system design. 

The standard units for indicating pressure are bar (bar) and pascal (Pa), where 1 bar = 100,000 Pa. Important types of pressure in pump technology:

• Inlet pressure is the pressure at the pump inlet. Depending on the application, it can be affected by gravity, system pre-pressure, or another pump.
• Differential pressure: The pressure difference between the inlet and outlet sides of a pump, which is generated by the pump output. A higher differential pressure is required to transport media over larger heights or through long pipelines.
• System pressure is the pressure prevailing in a system, which results from various influencing factors such as frictional losses, fittings, or pipe cross-sections.
• Maximum operating pressure: The highest pressure for which a pump is designed. This depends on the design, the materials used and the sealing systems.