The experimental unit can be used to demonstrate the relationship between the pressure and temperature of water in a straightforward manner. Temperatures of up to 200°C are possible for recording the vapour pressure curve. The temperature and pressure can be continuously monitored via a Digital temperature display and a Bourdon tube pressure gauge.

In a closed system filled with fluid, a thermodynamic equilibrium sets in between the fluid and its vaporised phase. The prevailing pressure is called vapour pressure. It is substance-specific and temperature-dependent.

When a fluid is heated in a closed tank, the pressure increases as the temperature rises. Theoretically, the pressure increase is possible up to the critical point at which the densities of the fluid and gaseous phases are equal. Fluid and vapour are then no longer Distinguishable from each other. This knoSLedge is applied in practice in process technology for freeze drying or pressure cooking.

A temperature limiter and pressure relief valve are fitted as safety devices and protect the system against overpressure.

Technical details

Specification:

Temperature limiter and safety valve protect against overpressure in the system

Bourdon tube pressure gauge to indicate pressure

Measuring a vapour pressure curve for saturated vapour

Pressure boiler with insulating jacket

Digital temperature display.

Technical data:

Bourdon tube pressure gauge: -1…24bar

Temperature limiter: 200°C

Safety valve: 20bar

Heater: 2kW

Boiler, stainless steel: 2L

Measuring ranges

Temperature: 0…200°C

Pressure: 0…20bar

230V, 50Hz, 1 phase

230V, 60Hz, 1 phase

120V, 60Hz, 1 phase.