ON-OFF VALVE

I. Introduction ZXT type and ZSQT type of pneumatic film piston diaphragm regulating valves (pneumatic diaphragm valve for short) use the epsilon shaped extruding surface between the diaphragm and the valve body to form sealing, which is segregated from outside (without stuffing box). Simple and smooth, the flow path can be covered by erosion resistant coating, especially suitable for the corrosive and toxic situations. ZXT type of valve adopts the multiple-spring actuator with both height and weight reduced by 30%. The internal surface of the valve body is covered with coatings of several kinds of materials so as to avoid direct contact with the media and stand corrosion of strongly corrosive media. The inside and outside leakage becomes zero when the valve is closed, so the product is suitable for controlling highly toxic or unallowable polluting media in particular. The flow path of the valve body is simple with low resistance force. The rated flow coefficient is larger than single-seat sleeve regulating valve of same diameter. II. Product feature 1. ZXT type of valve adopts the multiple-spring actuator with both height and weight reduced by 30%. 2. The internal surface of the valve body is covered with coatings of several kinds of materials so as to avoid direct contact with the media and stand corrosion of strongly corrosive media. 3. The inside and outside leakage becomes zero when the valve is closed, so the product is suitable for controlling highly toxic or unallowable polluting media in particular. 4. The flow path of the valve body is simple with low resistance force. The rated flow coefficient is larger than single-seat sleeve regulating valve of same diameter.