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原文：
Need new valves to be legal,and have not been used for many years, need a special valve made for aluminum tanks? If so, which valve do I need for the aluminum tank as opposed to the steel ? the 7" dip tube length at the link above says it is for 40# aluminum tanks as per the OP. Many Airstream tanks are 30# - I didn't see one at that source that said it was for 30# aluminum tanks. There should be a DT value stamped on the tank collar to help you make sure you get the right one. The problem is that aluminum tanks are shaped a bit differently so the 80% full level, which is where the dip tube shuts off when filling, is different between aluminum and steel tanks of the same capacity. When the OPD valves were mandated a few years ago, a number of Airstream owners had some problems because propane companies just used the steel tank DT and it wasn't the right one for their aluminum tanks.
原文来自： http://www.postzambia.com/post-read_article.php?articleId=3695

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米我明白，工厂四○磅。铝坦克来到了我最近购买了1976气流，其中，我被告知，需要新的阀门是合法，也没有被使用多年，需要一个特殊的阀门，铝坦克？如果是这样，我的阀门为相对于钢铝合金罐的需要？ 7“浸在上面的链接管长说，现在是40＃按业务方案铝坦克。不少气流坦克，30＃ - 我没有看到这一来源之一，它说，30＃铝坦克。应该有一个DT值衣领上的坦克标记，以帮助您确保您得到正确的。问题是，铝制罐的形状有点不同，因此80％的全部费用，这是其中浸管填表时自动关闭，铝之间的相同容量的不锈钢罐不同。当门诊阀门被授权在几年前，一些业主的气流，因为有一些公司只用丙烷的钢罐胸苷问题，这不是他们的铝制罐正确的。

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