| 摘要 |
<p>The automatic valve comprises a valve seat (52) having first gas flow passages (58) extending there through and a valve guard (54) having second gas flow passages (61) extending there through. The valve further comprises at least one shutter member (60) movably arranged between the valve guard and the valve seat. The shutter member is biased by a set of spring members (62) towards a closed position in sealing engagement with the valve seat (52), for closing the first gas flow passages (58). A spring holder ring (68) with a plurality of spring retention seats (66) is also provided. Each spring member is partially housed in a respective spring pocket (64) formed in the valve guard (54) and retained in a respective spring retention seat (66).</p> |
