Nuclear-grade valves are pressure-bearing parts with very strict quality requirements, and it is very important to ensure the quality of their products. The product quality of the valve is guaranteed by the whole process of design, production and use. Doing a good job in valve manufacturing and quality inspection is of great significance to the economical and safe operation of nuclear power valve …

The plug valve is a rotary valve in the shape of a closing member or a plunger. By rotating 90 degrees, the channel port on the valve plug is the same as or separated from the channel port on the valve body, so as to realize the opening or closing of a valve. The shape of the plug of the plug valve can be cylindrical or conical. In cylindrical valve plugs, the passages are generally rectangular; i…

Knife gate valves are mostly used in some difficult-to-control fluid pipelines, such as sewage, chemical, coal, papermaking and other fields. They are generally equipped with electric or pneumatic actuators to realize the automatic operation of the valve. The gate with the vertical direction is used as the gate valve of the opening and closing parts, and the effect of cutting off the medium is goo…

Ball valve is the fastest growing type of valve in China in recent years. In addition to hard-sealed ball valve, double eccentric hemispherical ball valve has also developed rapidly. Double eccentric hemispherical ball valve is a domestic product developed by importing German hemispherical valve products under the premise of carefully weighing the advantages and disadvantages of various valves suc…

Socket welding is to insert one end of the pipe into the object to be welded with it, which is good for positioning, good welding and high strength. Socket welds are fillet welds, and socket welds have a higher pressure resistance and are commonly used for high-voltage parts. Socket welding is that the pipe is inserted into the tube sheet, and its weld is called a fillet joint. Socket welding is t…

Due to the characteristics of the two-phase structure, through the correct control of the chemical composition and heat treatment process, the duplex stainless steel valve has the advantages of both the ferritic stainless steel valve and the austenitic stainless steel valve, and it combines the excellent toughness and the austenitic stainless steel valve. Weldability is combined with the higher st…

The eccentric hemispherical valve is a top-loading structure. The valve installed on the pipeline can be directly inspected and maintained online, which can effectively reduce the shutdown of the device and reduce the cost.…

Lift check valve refers to a valve that automatically opens and closes the valve flap by relying on the flow of the medium itself to prevent the backflow of the medium, also known as check valve, one-way valve, reverse flow valve, and back pressure valve. The check valve is an automatic valve whose main function is to prevent the backflow of the medium, the reverse rotation of the pump and the dri…