| 摘要 |
<p>PURPOSE:To prevent the liquid outflow from an evaporator by closing a switch valve when liquefied gas in a liquid form enters a level sensor located between the upper portion of a storage tank and a pressure adjusting switch valve and by opening the switch valve when the liquid level in the level sensor is lowered. CONSTITUTION:The liquefied gas in a storage tank 1 is extracted in a liquid state and is gasified by the atmospheric heat. The gas at the upper portion of the storage tank 1 is applied to a pressure adjusting switch valve 8 through a pilot regulator 2, a throttle valve 3, and a level sensor 5, thus regulating the pressure of the liquefied gas to keep the pressure in an evaporator 10 constant. When the liquid level of the liquefied gas in the evaporator 10 rises and the liquefied gas in a liquid form flows into a level sensor 5 chamber, the pilot gas pressure in the switch valve 8 is reduced and the switch valve 8 is closed, thereby the outflow of the liquefied gas in a liquid form can be prevented when the evaporated gas quantity is lacking. When the liquid level in the level sensor 5 chamber is lowered, the switch valve 8 is opened.</p> |
