| 摘要 |
<p>The present invention provides a reliable regulating device that permits liquids, such as fuel oils, to be drained into the enclosure 18 while preventing the flow of gases into the enclosure 18. The device includes a valve housing 34 having a chamber 35 for receiving the liquids and the gases and a drain valve means in open flow communication with the liquids and gases. The drain valve means includes a valve seat 64 and a float member 70 both located within the valve housing 34. The float member 70 has a specific gravity less than the liquids passing through the device. The float member 70 floats off the valve seat 64 when the liquids flow through the valve housing 34 and engages the valve seat 64 when gases are present in the chamber preventing the gases from entering the enclosure 18. <IMAGE></p> |
