Main accessories of horizontal Dewar

The functions of the horizontal Dewar are realized through the following parts. Before operating the pressure vessel, you should read it carefully to familiarize yourself with the role and use of each part of the gas cylinder.
Supercharger: The supercharger uses a finned heat exchanger, which is installed at the bottom of the gas cylinder to increase the pressure in the Dewar. However, when the liquid level in the pressure vessel is low, the supercharging speed is very slow, so It is recommended that the user increase the pressure in the gas cylinder to 1.0MPa before use, so that the pressure in the Dewar can meet the requirements when using liquid.
 
Discharge valve: This valve is connected to the gas space of the gas cylinder. Opening this valve can release the gas in the bottle and reduce the pressure.
Inlet valve: This valve is used to control the filling of cryogenic liquid.
Outlet valve: This valve is used to control the output of cryogenic liquid.
Booster valve: This valve is used to control the booster circuit. Open this valve to pressurize the pressure vessel.
Pressure regulating valve: After the low-temperature liquid enters the supercharger and is converted into saturated steam through this valve, it returns to the gas phase space at the top of the gas cylinder, so that the pressure in the bottle reaches the set value of the pressure regulating valve. Pressure gauge: Shows the pressure of the inner container of the Dewar, the unit is pounds per square inch (psi) or megapascal (MPa).
Safety valve: The inner liner of the gas cylinder is designed with double safety valves, which can protect the gas cylinder in case of overpressure. (In the case of overpressure) The safety valve opens, its role is to dissipate the pressure rise caused by the normal heat leakage of the insulation layer and the support, or the pressure rise caused by the accelerated heat leakage after the interlayer vacuum is destroyed and under the fire condition.

The protection of the pressure vessel shell under overpressure conditions is achieved by a vacuum plug. If the liner leaks (causing the interlayer pressure to be too high), the vacuum plug will open the pressure relief. In case of leakage of the vacuum plug will cause the vacuum of the interlayer to be broken, then the "sweating" and frosting phenomenon of the outer shell can be found. Of course, frosting or condensation at the end of the pipe connected to the bottle is normal.