With the continuous development of science and technology, domestic valve market, but also to the high-tech, high-parameter, strong corrosion resistance, high-life direction. Based on the analysis of valve technology at home and abroad and domestic valve market demand analysis, the various industries in recent years with high-tech valve and valve industry development trend and investment direction, as follows:
1. Oil, natural gas wellhead valves
Oil, natural gas wellhead valve is mainly used to meet U.S. API6A standard single gate or double plate, there is no diversion diversion hole or holes parallel forged steel gate valve, slurry valve, throttle angle (CHOKE valve ), pilot operated safety valve and check valve.
The nominal level of the valve API2000psi, 3000psi, 5000psi, 10000psi, 15000psi, 20000psi; nominal diameter of DN46 Engineering ~ 228mm (113/16in ~ 9in); temperature class K (-60 ~ 182 ℃), L ( -42 ~ 182 ℃), P (-29 ~ 182 ℃), R (room temperature), S (-18 ~ 166 ℃), T (-18 ~ 182 ℃), U (-18 ~ 121 ℃), V ( 2 ~ 121 ℃); material requirements for the AA, BB, CC, DD, EE, FF, HH; material properties required by the 36K, 45K, 60K, 75K; product technical requirements by PSL1 (product specification level 1), PSL2 (product conformance level 2), PSL3 (product specification grade 3), PSL4 (product specification grade 4).
2. Oil, natural gas long-distance pipeline valve
Oil, natural gas long-distance pipeline valves are mainly in line with U.S. API6D standard single gate or double plate, there is no diversion diversion hole or holes parallel forged steel gate valve; forged or cast steel three-body, coat type or all-welded ball valve fixed; oil seal or pressure balanced plug valves; Swing or butterfly valve, ball valve through; pigging valve.
The nominal level of the valve CL150 (PN2.0MPa), CL300 (PN5.0MPa), CL400 (PN6.4MPa), CL600 (PN10.0MPa), CL900 (PN15.0MPa), CL1500 (PN25.0MPa), CL2500 (PN42.0MPa); nominal diameter of DN50 ~ 1500mm (2in ~ 60in); technical requirements for fire resistance test according to ISO10497; valve pressure test according to ISO5208.
3. Valves for nuclear power
Valves for nuclear power than conventional large-scale thermal power station with its technical characteristics and requirements of the valve is higher. Valves generally have gate valve, globe valve, check valve, butterfly valve, safety valve, main steam isolation valves, ball valves, diaphragm valves, pressure reducing valve and control valve; a representative of the highest technical parameters of the valve: maximum diameter DN1200mm (core 3 of the butterfly), DN800mm (core 2 of the main steam isolation valve), DN350mm (nuclear one of the main circuit gate); maximum pressure: about 1,500 pound; maximum temperature: about 350 ℃ ; media: the coolant (water diboride) and so on. Production of nuclear grade valve product requirements: usually by the nuclear industry standards EJ, American ASME, IEEE standards and the French pressurized water reactor nuclear island design and construction rules for mechanical equipment, RCC-M and so on.
Nuclear power development with the specific type of valve, the following parameters:
⑴ stuffing valve:
a hydraulic-driven valve. The valve with its own water pressure push the piston open or close the valve Nominal Diameter: DN350, 400mm; working pressure: PN17.5MPa; Operating temperature: 315 ℃.
b fully enclosed electric gate. The valve should be closed using a special screen motor, through immersion in the work of the planetary reduction gear gate for the opening and closing movement. The valve nominal diameter: DN100 ~ 800mm; working pressure: PN2.5 ~ 45.0MPa; Operating temperature: 200 ~ 500 ℃.