The pigging valve is a new type of valve primarily used for cleaning long-distance pipelines carrying water, oil, natural gas, and other mediums. It facilitates the launch and reception of the pig, which is used for cleaning the pipeline. By using the appropriate pig, the valve can easily clean, empty, and isolate the pipeline, as well as transport the medium in an orderly manner and test the pipeline system. The pigging valve can completely replace the traditionally used and complex pig transmitting and receiving devices, with the pig transceiver as the core.

The pigging valve is innovatively designed based on the structural principle of the fixed ball valve, with modifications and additional functions. It inherits the performance characteristics of the two-position cut-off ball valve and can be opened and closed through a 90-degree rotation of the ball core. The valve can be designed as a double block, meaning it can discharge the medium in the body cavity when it is fully open or fully closed. This function is necessary for pigging valves.

A branch pipe is opened on the side of the valve body, with the branch pipe center intersecting the pipeline center perpendicularly. A quick-open blind plate and a vent valve are installed on the branch pipe, making it easy to feed the pig into or take it out of the pig valve. The diameter of the ball through hole is larger, and one end of the through hole can prevent the pig from passing through. A barrier allows the medium to circulate.

The pigging valve undergoes a 100% pressure test to ensure that there is no visible leakage in any sealing parts. It has a fire-resistant safety design, and when the elastic valve seat is burned, a metal-to-metal seal is formed between the ball and the valve seat. The valve body bonnet and valve stem are all set with high-temperature-resistant graphite gaskets to ensure high-temperature sealing reliability. The fire resistance test meets the requirements of API 6FA and API 607. The valve also has an antistatic design, with a static conductive spring that ensures good conduction between the ball and the valve body, as well as the valve stem and the valve body. This design leads out static electricity generated by friction.