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Introduce the material and application of diaphragm valve diaphragm
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Brief introduction of diaphragm valve diaphragm:
Diaphragm-is one of the more critical parts in the diaphragm valve. In addition to the valve body, the diaphragm is also the only component that can directly contact the working medium. The diaphragm valve relies on the diaphragm to isolate the working medium, the actuator and the external air. 质其需要满足Fda的相关要求标准。 For example, the material of the diaphragm valve diaphragm used in the pharmaceutical water system needs to meet the relevant requirements of Fda. 属于运动部件，隔膜阀其依靠膜片的上下移动从而实现工作介质流量的控制与切断。 Diaphragm valve diaphragm is a moving part. The diaphragm valve relies on the up and down movement of the diaphragm to control and cut off the flow of working medium. Therefore, the diaphragm is the main vulnerable spare part of the diaphragm valve. Depending on the operating conditions, diaphragm valves include EPDM diaphragms, FKM diaphragms, EPDM / PTFE composite diaphragms, and reinforced EPDM / PTFE diaphragms.
For diaphragm valves, there is no universal diaphragm suitable for the application. Therefore, different materials and industries will use different materials. Before selecting materials and determining the material of the diaphragm, generally, Application analysis. In addition, because different operating conditions often occur in different locations inside a device, different valves and materials may have to be used, especially the chemical properties and temperature of the working medium will cause a variety of interactions, so the diaphragm selection You must check the newer tolerance list one by one or check the suitability of the materials used by an authorized professional. Only in this way can the application be guaranteed to run more safely and economically for a long time.
In addition, the diaphragm is a fragile part, and it must be tested and replaced regularly, otherwise it may cause functional failure or even a dangerous situation. It should be noted that the inspection and replacement maintenance cycle of the diaphragm depends on the application, and the maintenance history and the load caused by frequent disinfection or frequent switching must be considered to determine a more appropriate maintenance cycle.
Diaphragm materials and properties:
1.Sanitary diaphragm valve
Based on a variety of material choices and multi-level surface treatment processes down to 0.25 µm, Gemmi's valves are EHEDG certified and are commonly used in the pharmaceutical industry. The sealing system ensures no leakage of the medium.
2.Disposable diaphragm valve
It consists of stainless steel pneumatic head and disposable diaphragm valve body. The PP valve body with TPE diaphragm meets USP 85 and USP 788 standards and meets the hygienic requirements of the pharmaceutical industry.