With the vigorous development of science and technology, the domestic valve product market has begun to study in terms of technical content, parameters, and resistance. According to the analysis of domestic valve technology and the domestic valve market demand, the development trend of new technologies in the valve industry and valve industry in the past is drawn.

1. Valves for oil and natural gas well core assembly: The valves for oil and natural gas well core assembly are mainly single ram or single ram, with or without diversion holes that conform to the API6A standard that is easy to use. type gate valve, mud valve, angle type throttle valve, pilot type safety valve and check valve.

2. Valves for pipelines with less oil and natural gas: The valves for pipelines with less oil and natural gas are mainly single gate or single gate, forged steel with or without diversion holes that conform to the API6D standard that is easy to use. Flat check gate valve; forged steel or cast steel three-body, top-loading or fully welded ball valve; oil-diluted or pressure-balanced plug valve; swing or butterfly check valve, ball check valve; muddy Pipe valve, etc.

3. Nuclear power valve: The technical characteristics of nuclear power valve are as follows compared with conventional large-scale hydropower station valves. Valves generally include gate valve, globe valve, check valve, butterfly valve, safety valve, main steam isolation valve, ball valve, Diaphragm valve, pressure reducing valve and control valve, etc.

The detailed example parameters of nuclear power valve development are as follows:

Gate valve without excavation box:

1. Hydraulic drive gate valve. The valve uses its own pressure water to push the piston to open or close, the valve nominal diameter: DN350, 400mm; working pressure: PN17.5MPa; working temperature: 315 ℃.

2. Fully unlocked electric gate valve. The valve should use a special screen-closed electromechanical, and the gate plate can be opened and closed through the internal star deceleration mechanism of water immersion work. The valve nominal diameter: DN100~800mm; working pressure: PN2.5~45.0MPa; working temperature: 200~500℃.