How to choose a diaphragm valve Diaphragm valve is one of the earliest regulating valves. It has the following characteristics: (1) The soft rubber diaphragm valve of the diaphragm valve can cut off the medium without leakage. (2) Diaphragm valve has a certain corrosion resistance due to rubber. Before the 1960s, there was no better corrosion-resistant material. It was usually used as a corrosion-resistant material for promotion and application, and it even continues to this day. (3) The flow path of the diaphragm valve is simple and has a 'self-cleaning' effect, which can be used for unclean media. (4) Diaphragm valve opening characteristics. When the diaphragm valve is used as a corrosion-resistant regulating valve, it has to use the front part of the quick-opening characteristic, which has a short effective stroke and poor adjustment quality. (5) Diaphragm valve is like a fatigue test piece, forcing it to fold up and down is easy to damage, because the diaphragm is an unreliable part, resulting in a short valve life, which is a fatal disadvantage. Because of this, the author has emphasized in recent years that diaphragm valves should be eliminated and replaced with ball valve
s and full-featured ultra-light valves. (6) When the diaphragm valve is closed, the force of the medium pushes the diaphragm upward, and the unbalanced force is large, which requires a large thrust of the actuator. Therefore, a particularly large and heavy actuator must be selected to reduce the weight of the valve. It becomes very bulky, 2 times that of a ball valve, and a diaphragm valve is 3-4 times that of a full-featured ultra-light valve. (7) What needs to be emphasized in particular for diaphragm valves is that there are more and more corrosion-resistant materials, especially in the late 1980s, when the fluorine-lined plastic process was solved, and the fluorine-lined ball valve came out. Since fluoroplastics are more corrosion-resistant and temperature-resistant than rubber, and the ball core of the ball valve is ten times stronger than the diaphragm of the diaphragm valve, Xiandie Valve recommends that the customer try not to use the diaphragm valve when cutting and adjusting the corrosive medium. Our Shanghai Xian Butterfly Valve is choosing corrosion-resistant fluorine-lined ball valves, butterfly valves and all-tetrafluoro single-seat valves. Let's take an example to illustrate: in the water treatment system, the valve used in the desalination device, 10 years ago, whether it is a foreign or domestic device, a diaphragm valve lined with fluorine plastic was selected, and its service life is about one year. As short as 3 to 6 months, therefore, the diaphragm is constantly being replaced. After choosing our recommended special ball valve for water treatment, this problem was solved very well. The service life of the diaphragm valve is as long as 7 to 8 years, and it can generally be used for 3 to 5 years.
If you are looking for an effective and safe way to take care of types of industrial valves, then valve application types of industrial valves are the best bet.
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