The advantage of manual diaphragm valve is similar with pinch valve. Its closing components would not be wetted by the process medium, therefore we can use cheaper materials in corrosive process medium. Fluid is straight through or approximate to a straight through, and small pressure fall, making it as an ideal switch operation, and avoid the turbulent flow. Because the diaphragm is located in the pressured valve body, diaphragm valve can deal with slightly higher pressure than pinch valve, but the total pressure and temperature rated range is dependent on the material toughness or enhancement of the diaphragm. Fluid channels of valve body is associated with diaphragm toughness performance. Another advantage of diaphragm valve is that if the diaphragm failed, the body can hold out small flowing, and better than tightening valve housing. The application condition of diaphragm valve is similar to pinch valve. Springback of diaphragm make it sealed along with the fluid particles , and it can be making ideal operation for the material of pulp, process material or containing solid fluid .
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