Threaded check valve refers to a valve that automatically opens and closes the disc depending on the flow of the medium itself to prevent the medium from flowing back. It is also called check valve, one-way valve, reverse flow valve and back pressure valve

Gate valve refers to a valve whose closing part (gate) moves along the vertical direction of the channel axis. It is mainly used for cutting off the medium in the pipeline

The so-called pneumatic valve specifically refers to the use of a cylinder as an actuator and compressed air as a power source to drive the valve to adjust the switch.

According to reports, in the next 10 years, my country will have more than 20,000 kilometers of oil pipelines to be constructed, including transnational oil pipelines such as Russia and Kazakhstan. In addition, following the "West-East Gas Pipeline", my country has to build more than 20,000 kilometers of transnational gas pipelines and branch lines.

The practice of only specifying specifications, categories, and pressures to meet the procurement requirements when purchasing electric ball valves is imperfect in the current market economy environment. For the sake of product competition

Pneumatic valve has a larger action moment than electric valve. The switch action speed of pneumatic valve can be adjusted. The structure is simple and easy to maintain. Due to the cushioning characteristics of the gas itself, it is not easy to be damaged due to jamming during the action. It has a gas source and its control system is also More complicated than electric valves.