About the difference between valve flanges RTJ, RF
Different pressure flange thickness is different, they use the bolt is also different. Water pump and valve, and in the pipe connection, these equipment parts of the equipment also made corresponding flange shape, also known as flange connection. Any connecting parts that are bolted and closed in the vicinity of the two planes are generally referred to as flanges, such as the connections of the ventilation ducts, which can be called flanges". However, this connection is only part of a device, such as flanges and pumps connected, it is not good to call the water pump flange parts". Relatively small, such as valves, can be called flanges". Reducer flange for motor and reducer connection, as well as reducer and other equipment between the connection. The flange has a good overall performance, it is widely used in chemical industry, construction, water supply, drainage, oil, light and heavy industry, refrigeration, sanitation, plumbing, fire protection, electric power, aerospace, shipbuilding and other infrastructure projects. Three, RTJ and RF, RTJ and RF, respectively, indicate the form of the flange sealing surface: RTJ means that the metal ring is sealed and used in high pressure situations, such as RTJ, the maximum pressure is 42.0MPa. RF indicates bursting seal, for low pressure applications such as RF, maximum pressure 15.0MPa.
RTJ is metal ring joint sealed, RF is wrapped gasket seal. High pressure use RTJ, low voltage use RF.
Two, flange (Flange), also known as flange, flange plate or edge. A flange is a part that is connected between the pipe and the pipe, used for the connection between the ends of the pipe. It is also used for the flange on the entrance and exit of the equipment. It is used for the connection between the two devices, such as the reducer flange. Flange connection or flange joint means that the flange, the shim and the bolt are mutually connected as a group of three detachable sealing structures. Pipe flanges are flanges used for piping in pipe installations. They are used on equipment and refer to the entrance and exit flanges of the equipment. The flange is lined with bolts to secure the two flanges. Gaskets for gaskets between flanges. Sub threaded flange connection (threaded connection), flange welding flange and flange clamp. Flanges are used in pairs. Low pressure pipes can be made of wire flanges and welded flanges with pressures of more than four kilograms. Add a gasket between the two flanges and secure with bolts.
A valve, the valve is in fluid system, a device used to control the direction of fluid flow, pressure, the piping and equipment within the media (liquid, gas, powder) device can control the flow and the flow or stop. Valve is the control component of the pipeline fluid delivery system. It is used to change the section of the channel and the direction of the medium flow. It has the functions of diversion, cut off, throttling, check, diversion or overflow and pressure relief. For fluid control valves, valve from the simplest to the most various valves automatic control system used in complex, its many varieties and specifications, the valve nominal diameter from industrial piping and instrumentation valves tiny tolarge diameter 10m valve. Can be used for the control of water, steam, oil, gas, mud, all kinds of corrosive medium, liquid metal and radioactive fluid and other types of fluid flow, the valve working pressure from 0.0013MPa to 1000MPa ultra high pressure, working temperature from ultra low temperature to high temperature 1430 degrees -270 degrees celsius.
