What is a diaphragm valve?

September 17, 2021

Diaphragm valve is in the valve body and the valve cover with a flexible diaphragm or a combination of the diaphragm, the closing member is connected with the diaphragm of a compression device. Seat can be weir-shaped, it can be straight through the channel wall. The advantage of the diaphragm valve is that its operating mechanism is separated from the medium passage, which not only ensures the purity of the working medium, but also prevents the medium in the circuit from impacting the working parts of the operating mechanism. In addition, the stem does not require any form of separate seal unless it is used as a safety feature in the control of hazardous materials. In diaphragm valves, because the working medium contacts only the diaphragm and the valve body, and both can use a variety of different materials, the valve ideally controls a wide range of working media, especially for applications with chemically aggressive or suspended particles medium. The operating temperature of the diaphragm valve is generally limited by the material used for the diaphragm and body liner, and its operating temperature range is approximately -50 to 175 ° C. Diaphragm valve structure is simple, only by the valve body, diaphragm and valve cover assembly of the three main components. The valve is easy to disassemble and repair quickly, replacing the diaphragm can be done on site and in a short time. Separating the actuator from the media path makes the diaphragm valve suitable not only for food and medical and industrial hygiene but also for difficult to transport and hazardous media. A variety of synthetic elastomers and engineering plastics, as well as the wider choice of body lining materials, make diaphragm valves widely used in all areas of modern industry.

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Author:

Mr. Zheng

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zheng@rmiplast.com

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+86 15888074637

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