 |
|
Product sales
Valve Repair
|
|
|
| Direction of development of nuclear power valves |
| Article source： Update Time：2008-9-6 |
 |
Valve repair experts ---- Jiangyin Oulei Si
The direction of development of nuclear power valve
1. The direction of development of nuclear power units
According to data analysis, in the nuclear power plant construction, the direction of development capacity of the units abroad mainly to the 1.3 million, 140 million and 1.5 million kilowatts direction. The major domestic to 80 million, 900,000 and 1 million directions. Nuclear power equipment will be large-scale, high-parameter, high-performance direction.
2. The direction of development of nuclear power valve
As the nuclear industry, nuclear power plant equipment, large-scale, high-parameter, high performance and reliability, security, have become increasingly demanding. This requires that nuclear power valves can also adapt to this trend.
The development of nuclear power with the specific type of valve, the parameters are as follows:
⑴ no stuffing of the valve:
a hydraulic-driven gate valve. The valve piston with its own pressure water to promote open or closed, the valve Nominal diameter: DN350, 400 mm; working pressure: PN17.5MPa; operating temperature: 315 ℃.
b-wide closed electric valve. The valve should be closed using a special screen motor, through immersion in the work of planetary reducer for institutions to make damper open and close movement. The valve Nominal diameter: DN100 ~ 800 mm; working pressure: PN2.5 ~ 45.0MPa; operating temperature: 200 ~ 500 ℃.
⑵ cut-off valve:
The cut-off the road for the auxiliary control valve. The valve is usually three kinds of structures, namely, filler-type cut-off valve, bellows globe valve, and metal diaphragm valve. The valve medium medium parameters (medium temperature, medium pressure) of water and steam; Nominal diameter: DN10 ~ 150 mm.
⑶ Butterfly:
Containment for the cooling system and air transportation systems in the butterfly medium. The valve is usually three kinds of structures, namely, coaxial Direct Connect rubber lined butterfly valve, eccentric metal sealing butterfly valve and double-action (butterfly plate torn off before turning the sealing surface and then rotating) metal sealing butterfly valve. The valve Nominal Diameter: DN ≤ 2500 mm; Working pressure: PN <4.0MPa; operating temperature: 100 ~ 150 ℃. In addition, the duct system for the rapid closure of butterfly, its nominal diameter: DN400 ~ 1200 mm are also listed as the direction of development.
⑷ with the detector pilot safety valve:
For the nuclear island systems with a detector pilot safety valve. Using the pilot-type safety valve with a detector may be based on pressure-sensitive balance between spring force to change the location of controlled-release of two Canadian media contact charging principle, from the structure to avoid jamming problems. The use of positive-action valve with a spring pre-tightening and bellows sealed valve flap structure, and can ensure a reliable seal. The valve Nominal diameter: DN600 mm; working pressure: PN1.265MPa.
⑸ valve-type isolation valve:
Non-return valve for the steam system-type isolation valve, its structure and shape is similar to lift check valve. The valve Nominal Diameter: DN64 ~ 800mm (21/2in ~ 30in); working pressure: PN1.0 ~ 42.0MPa (Class600 ~ 2500); working temperature: -29 ~ 1050 ℃.
⑹ main steam isolation valve
The nuclear island and conventional island with the main steam isolation valves, main water valve, its nominal diameter: DN800 mm; Nominal pressure: 40.0MPa; temperature of 700 ℃;
In addition, to meet the seismic requirements of the safety valve, fuel extraction software and hardware used in sealed high vacuum solenoid valves, coat-type nuclear power is also a much-needed development of nuclear power ball valves.
Valve repair experts ---- Jiangyin Oulei Si
Valve repair expert - Jiangyin Oulei Si
Only the professional competence to create a good quality
Only good quality in order to forge a brand
Only professional services in order to win market
Benefits can be created only to win the market
Only by creating efficiency in order to serve the community
Oulei Si co-operation with the mean high returns
Valve repair energy conservation benefits the country and |
|
|
 |
