脱盐水介质中含有低浓度的酸或碱，它们对橡胶有较大的腐蚀。橡胶的被腐蚀表现为膨胀、老化、强度低，用衬胶的蝶阀、隔膜阀使用效果都差其实质就是橡胶不耐腐蚀所致。后衬胶隔膜阀改进为耐腐蚀能好的衬氟隔膜阀，但衬氟隔膜阀的膜片又经不住上下折叠而被折破，造成机械破坏，阀的寿命变短。现在{zh0}的办法是用水处理专用球阀，它可以使用到5～8年。 20世纪60年代问世的套筒阀，70年代在国内外大量使用，80年代引进的石化装置中套筒阀占的比率较大，那时，不少人认为，套筒阀可以取代单、双座阀，成为第二代产品。到如今，并非如此，单座阀、双座阀、套筒阀都得到同等的使用。这是因为套筒阀只是改进了节流形式、稳定和维护好于单座阀，但它重量、防堵和泄漏指标上与单、双座阀一致，它怎能取代单、双座阀呢？所以，就只能共同使用。

“Valve in the use of Frequently Asked Questions”是由中国气动阀门网提供的国际阀门新闻，译文仅供参考。另外，中国气动阀门网还提供相关产品搜索：气动阀门型号、气动阀门价格、气动阀门技术、气动阀门新闻、气动阀门生产商等。

原文： Desalination of water medium containing low concentration of acid or alkali, they he a greater corrosive to rubber. Rubber showed expansion of corrosion, aging, low intensity, with the rubber lining of the butterfly valve, diaphragm use the results are worse in essence, rubber GATE VALVEScorrosion caused by impatience. After the rubber lining for Diaphragm Valves to improve corrosion resistance of a good Lining diaphragm valves, diaphragm valves of the diaphragm, but lined up and down then stand up to collapse were broken off, resulting in mechanical damage to valves shorter life expectancy. Now the best way to deal with specific water valve, it can use to 5 ~ 8 years. The 20th century adventGLOBE VALVE of the sleeve valve 60's, 70's hey use at home and abroad, and 80 years the introduction of the sleeve valve petrochemical plant accounted for a larger proportion of that time, many people think that the sleeve valve can replace a single, double seat valve, to become the second-generation products. By now, is not the case, single-seat valves, seat valves, sleeve valves he SAFETY VALVES been the same use. This is because the sleeve valve is throttling the form of improved stability and maintenance of better than single-seat valve, but it's weight, aiming to halt and leakage targets with single-seat valve in line, how can it replace the single-seat valve it? So, the only shared use.

原文来源:http://www.1qidongfamen.com/news_detail/items/ba.html