Welded diaphragm valve is a special form of block valve. Its opening and closing part is a diaphragm made of soft material, which separates the inner cavity of the valve body from the inner cavity of the valve cover. Due to the limitation of valve body lining process and diaphragm manufacturing process, the manufacturing process of larger valve body lining and diaphragm is very difficult, so the diaphragm valve is not suitable for larger pipe diameter and is generally applied to pipelines ≤ DN200.

Where is the welded diaphragm valve applicable

Due to the limitation of diaphragm material, welded diaphragm valve is suitable for occasions with low pressure and low temperature. Generally, it shall not exceed 180 ℃. As the diaphragm valve has good anti-corrosion performance, it is generally used in devices and pipelines with corrosive media. Due to the service temperature of diaphragm valve, the applicable medium is limited by the lining material of diaphragm valve body and diaphragm material.