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Simple Structure: It consists of a few components, mainly including a cast iron body, a disc, and a seal. The disc rotates around the axis in the cylindrical channel of the valve body to control the flow. It has a compact structure, is small in size and light in weight, occupying little space.
Easy to Operate: Only a 90 - degree rotation is required for quick opening and closing, and it can be manually controlled by a handle with a locking lever or a gear wheel. Some valves have an ISO 5211 connection on top, which enables the installation of a matching actuator for remote control and program - controlled operations.
Good Flow Control: When the butterfly valve is in the fully open position, the thickness of the disc is the only resistance to the medium flowing through the valve body, resulting in a small pressure drop. Therefore, it has a good flow - control characteristic and is suitable for on - off and flow - modulation operations.
Wide Range of Seal and Disc Materials: With a cast - iron housing, and a wide array of disc and seal materials are available. The common combinations include EPDM seat with ductile iron disc or stainless - steel disc, which allows users to select the appropriate combination according to the media and environment of the application.
Water Supply and Drainage Systems: It is widely used in urban water supply and drainage pipelines, as well as in industrial and agricultural water - use systems. For example, in the water - supply pipelines of factories and the irrigation systems of farms, the Cast Iron Wafer Butterfly Valve can be used to control the flow and cut - off the water supply3. It is also suitable for use in sewage - treatment plants to control the flow of sewage.
Industrial Pipeline Systems: It can be used in various industrial pipelines that transport liquids, slurries, and gases, such as in the chemical, petroleum, and gas industries1. For example, in chemical - plant pipelines that transport non - corrosive or weakly corrosive media, the Cast Iron Wafer Butterfly Valve can be used for on - off control and flow regulation. It is also applicable to gas - transmission pipelines in the petroleum and gas industry within a certain pressure and temperature range.
HVAC Systems: In heating, ventilation, and air - conditioning systems, this type of valve is used to adjust the flow of chilled water, hot water, and air. For example, in the central - air - conditioning systems of buildings, the Cast Iron Wafer Butterfly Valve can be used to control the flow of chilled water in the pipeline to achieve the purpose of adjusting the temperature of each area.
Nominal Diameter: Usually ranging from small diameters such as 2 inches to large diameters of 10 inches or more, which can meet the needs of different pipeline systems. Common specifications include 2 - inch, 3 - inch, 4 - inch, 6 - inch, 8 - inch, and 10 - inch valves4.
Nominal Pressure: It can generally withstand nominal pressures of PN10, PN16, and Class - 150. Different models and manufacturers may have different pressure - bearing capacities, which should be selected according to the actual requirements of the pipeline system3.
Temperature Range: The applicable temperature range is relatively wide, generally - 20 °C to 120 °C. However, the specific temperature range may vary depending on the material of the disc and seal. For example, when using certain high - temperature - resistant seal materials, the valve can be used in higher - temperature environments.
Sealing Performance: The Cast Iron Wafer Butterfly Valve has good sealing performance. The EPDM seat and the disc cooperate with each other to achieve a good sealing effect, which can meet the requirements of different media for leakage - tightness. In some cases, it can achieve zero leakage.
Installation Notes
Installation Position: The valve can be installed in a horizontal or vertical pipeline, but it should be ensured that the installation position is convenient for operation and maintenance. When installed in a vertical pipeline, the medium flow direction should be from bottom to top.
Pipeline Connection: The wafer - type structure of the valve is connected between the two - pipe flanges by bolts. During installation, it is necessary to ensure that the flanges at both ends are aligned and the bolts are evenly tightened to avoid affecting the sealing performance of the valve.
Pre - installation Inspection: Before installation, check whether the valve body and internal components are damaged, and whether the disc rotates flexibly. Clean the pipeline and valve interior to prevent impurities from entering the valve and affecting its normal operation.
Maintenance Requirements
Regular Inspection: Regularly check the sealing performance of the valve, and whether there is leakage at the connection between the valve body and the pipeline. Check the wear condition of the disc and the seat. If there is excessive wear, timely replacement of the components is required.
Lubrication: Lubricate the rotating parts of the valve regularly, such as the valve shaft and the gear - wheel, to ensure their flexible rotation and reduce wear.
Cleaning: Keep the valve surface clean and free of dirt and corrosion. Clean the internal impurities of the valve regularly to prevent the accumulation of impurities from affecting the flow - control performance and sealing performance of the valve.
Simple Structure: It consists of a few components, mainly including a cast iron body, a disc, and a seal. The disc rotates around the axis in the cylindrical channel of the valve body to control the flow. It has a compact structure, is small in size and light in weight, occupying little space.
Easy to Operate: Only a 90 - degree rotation is required for quick opening and closing, and it can be manually controlled by a handle with a locking lever or a gear wheel. Some valves have an ISO 5211 connection on top, which enables the installation of a matching actuator for remote control and program - controlled operations.
Good Flow Control: When the butterfly valve is in the fully open position, the thickness of the disc is the only resistance to the medium flowing through the valve body, resulting in a small pressure drop. Therefore, it has a good flow - control characteristic and is suitable for on - off and flow - modulation operations.
Wide Range of Seal and Disc Materials: With a cast - iron housing, and a wide array of disc and seal materials are available. The common combinations include EPDM seat with ductile iron disc or stainless - steel disc, which allows users to select the appropriate combination according to the media and environment of the application.
Water Supply and Drainage Systems: It is widely used in urban water supply and drainage pipelines, as well as in industrial and agricultural water - use systems. For example, in the water - supply pipelines of factories and the irrigation systems of farms, the Cast Iron Wafer Butterfly Valve can be used to control the flow and cut - off the water supply3. It is also suitable for use in sewage - treatment plants to control the flow of sewage.
Industrial Pipeline Systems: It can be used in various industrial pipelines that transport liquids, slurries, and gases, such as in the chemical, petroleum, and gas industries1. For example, in chemical - plant pipelines that transport non - corrosive or weakly corrosive media, the Cast Iron Wafer Butterfly Valve can be used for on - off control and flow regulation. It is also applicable to gas - transmission pipelines in the petroleum and gas industry within a certain pressure and temperature range.
HVAC Systems: In heating, ventilation, and air - conditioning systems, this type of valve is used to adjust the flow of chilled water, hot water, and air. For example, in the central - air - conditioning systems of buildings, the Cast Iron Wafer Butterfly Valve can be used to control the flow of chilled water in the pipeline to achieve the purpose of adjusting the temperature of each area.
Nominal Diameter: Usually ranging from small diameters such as 2 inches to large diameters of 10 inches or more, which can meet the needs of different pipeline systems. Common specifications include 2 - inch, 3 - inch, 4 - inch, 6 - inch, 8 - inch, and 10 - inch valves4.
Nominal Pressure: It can generally withstand nominal pressures of PN10, PN16, and Class - 150. Different models and manufacturers may have different pressure - bearing capacities, which should be selected according to the actual requirements of the pipeline system3.
Temperature Range: The applicable temperature range is relatively wide, generally - 20 °C to 120 °C. However, the specific temperature range may vary depending on the material of the disc and seal. For example, when using certain high - temperature - resistant seal materials, the valve can be used in higher - temperature environments.
Sealing Performance: The Cast Iron Wafer Butterfly Valve has good sealing performance. The EPDM seat and the disc cooperate with each other to achieve a good sealing effect, which can meet the requirements of different media for leakage - tightness. In some cases, it can achieve zero leakage.
Installation Notes
Installation Position: The valve can be installed in a horizontal or vertical pipeline, but it should be ensured that the installation position is convenient for operation and maintenance. When installed in a vertical pipeline, the medium flow direction should be from bottom to top.
Pipeline Connection: The wafer - type structure of the valve is connected between the two - pipe flanges by bolts. During installation, it is necessary to ensure that the flanges at both ends are aligned and the bolts are evenly tightened to avoid affecting the sealing performance of the valve.
Pre - installation Inspection: Before installation, check whether the valve body and internal components are damaged, and whether the disc rotates flexibly. Clean the pipeline and valve interior to prevent impurities from entering the valve and affecting its normal operation.
Maintenance Requirements
Regular Inspection: Regularly check the sealing performance of the valve, and whether there is leakage at the connection between the valve body and the pipeline. Check the wear condition of the disc and the seat. If there is excessive wear, timely replacement of the components is required.
Lubrication: Lubricate the rotating parts of the valve regularly, such as the valve shaft and the gear - wheel, to ensure their flexible rotation and reduce wear.
Cleaning: Keep the valve surface clean and free of dirt and corrosion. Clean the internal impurities of the valve regularly to prevent the accumulation of impurities from affecting the flow - control performance and sealing performance of the valve.
