Characteristics and Application of Diaphragm Valve

The diaphragm valve uses a corrosion-resistant lined body and a corrosion-resistant diaphragm to replace the valve core assembly and uses the movement of the diaphragm to regulate. The valve body of the diaphragm valve is made of cast iron, cast steel, or cast stainless steel, and is lined with various corrosion-resistant or wear-resistant materials, diaphragm material rubber, and polytetrafluoroethylene. Due to the limitation of the material of the diaphragm and the lining, the pressure resistance and temperature resistance are poor, and generally only applicable to the nominal pressure of 1.6MPa and 150°C. Its flow characteristics are close to the quick opening characteristics, and it is approximately linear before 60% of the stroke, and the flow does not change much after 60%.

Diaphragm valve features:

1. Small fluid resistance.

2. It can be used in the medium containing hard suspended matter; since the medium only contacts with the valve body and the diaphragm, there is no need for a stuffing box, there is no leakage of the stuffing box, and there is no possibility of corrosion on the valve stem.

3. Cannot be used in places with high pressure.

Pneumatic diaphragm valves, referred to as pneumatic diaphragm valves, can be equipped with feedback signals, limiters, and positioners to meet the needs of automatic control, program control, or conditional flow. This product uses a thin-film propulsion cylinder instead of a piston cylinder, which eliminates the disadvantage that the piston ring is easily damaged, resulting in leakage, which leads to failure to open and close the valve. When the air source fails, the hand wheel can still be operated to open and close the valve.

The Sanitary Diaphragm Valve With Sample produced by Xi'an Changxin Metal Products Co., Ltd. is of guaranteed quality, when you send us an inquiry, please let us know your detailed usage so that we can provide you with the right product.