Rotary plug valves GB 12240-89
Rotary plug valves are a special type of general-purpose valves. The GB 12240-89 is the national standard that specifies the design, manufacture and performance standards of these valves. The purpose of the GB 12240-89 standard is to ensure that all rotary plug valves meet the same level of quality and safety.
The design and construction of rotary plug valves are based on their intended application and can vary significantly between different manufacturers and models. Generally, these valves consist of a body, a plug, and several seals. The body is a hollow tube that houses the plug. The plug is a cylindrical valve component that rotates within the body and functions as a valve. The seals are O-rings or seals that fit between the plug and the body. These seals help to create a tight seal and prevent fluid from escaping when the valve is in the closed position.
In its closed position, the plug fits snugly against the body, completely sealing off the flow of the media. When the plug is in the open position, the flow is allowed to pass through the valve. However, depending on the model, some valves can be adjusted to partially open or close off the flow. The purpose of the GB 12240-89 is to ensure that operators are aware of the correct open and closed positions in order to ensure safe and efficient operation.
The GB 12240-89 also specifies a variety of different tests that must be conducted in order to verify the performance of the valve. This includes testing the resistance of the seals, the maximum flow rate, and the pressure drop. This helps to ensure that the valve meets the appropriate safety and performance standards. Additionally, the standard also imposes limits on the amount of leakage in the valves.
Overall, the GB 12240-89 is an important standard as it lays out the design and performance requirements necessary for rotary plug valves to be approved by the quality control authorities of China. It helps to ensure that all components of the valve are correctly designed and work together in order to provide a high-quality, safe and efficient operation. This in turn helps to minimize the risks associated with using these valves and ensure that all products sold meet the highest standards.
