| 摘要 |
<p>Valve has body to be connected in gas-tight manner to inlet of gas cylinder. First passage extending through body is to receive a probe permitting liquefied gas to enter cylinder from it and evaporate in cylinder. First valve opens and closes first passage. Second passage extends through body to enable gas to be taken from cylinder and second valve controls speed at which gas flows through second passage. Preferably, cylinder is filled by introducing end of probe into first passage, opening this passage with first valve, and inputting preset amount of liquid gas via probe which is then withdrawn from first passage; gas is allowed or made to evaporate to give desired gas pressure in cylinder.</p> |
