
High temperature and high pressure resistance performance: The steam parameters of the main steam system are extremely high (for example, the steam Pressure of the subcritical unit is about 16MPa, and the temperature is 540 ℃; Pressure of supercritical unit ≥ 22.1MPa, temperature ≥ 566 ℃), so the valve material must have excellent high temperature strength, oxidation resistance and creep resistance. The valve body, ram and other parts must undergo strict heat treatment (such as normalizing+tempering) to stabilize performance.
Reliable sealing performanceThe steam medium has strong permeability and the material is prone to deformation at high temperatures. The sealing surface of the gate valve needs to be precision machined and hardened. The wedge-shaped gate design can automatically compensate for the sealing gap through thermal expansion, ensuring no internal leakage (when cut off) or external leakage (at the packing) during the opening and closing process.
Anti erosion and fatigue resistanceThe main steam flow rate is high (usually 10-50m/s), and the valve passage is susceptible to steam erosion, especially at the edge of the gate and the inlet of the valve seat. It is necessary to optimize the shape of the passage (such as the flow line) and select wear-resistant materials; At the same time, the valve is subject to frequent temperature and Pressure fluctuations when starting and stopping or load changes, so it needs to have good fatigue resistance to avoid component cracking.
Operational stability: When the gate valve is opened and closed, the gate plate and the valve seat are in face contact. When the gate valve is opened, the thrust of steam Pressure on the gate plate must be overcome, so the drive device must have sufficient output torque; When closing, it is necessary to operate slowly to avoid damage to the sealing surface caused by steam impact. Electric actuators are usually equipped with overload protection and stroke limit functions to ensure safe operation


Company Profile
Shanghai Power Station Valve Factory Co., Ltd. was founded in 1966 and is located in Qingpu Park, Zhangjiang High tech Industrial Development Zone, Shanghai. The company was formerly known as Shanghai Power Station Valve Factory. After more than 50 years of entrepreneurship, creation, and innovation, the SDF brand is now a professional factory designated by the Ministry of Machinery and the State Power Corporation to produce high-temperature and high-pressure power station valves. It is a recommended enterprise for the main auxiliary equipment of 660MW and 1000MW thermal power units by the Power Planning and Design Institute, as well as recommended enterprises for the main auxiliary equipment of 660MW and 1000MW thermal power units by Huaneng, Huadian, Datang, State Power Investment, State Energy Investment, and various local power groups. It is also a member unit of the China Petroleum and Sinopec Equipment Industry Association.
The company has complete production equipment and sophisticated testing methods. The company's new factory covers an area of 73336 square meters, with a total investment of several billion yuan. The company has introduced major equipment such as "Olympus" optical emission direct reading spectrometer, ray flaw detection room, ultrasonic flaw detector, DP600 sealing surface plasma spray welding machine, 1800t high pressure large diameter valve Pressure testing machine, DN4000 CNC vertical machining machine tool, machining center, etc., so that the product processing and manufacturing capacity and testing level have been rapidly improved and improved. At present, the production capacity of 800000 sets of forged steel valves per year has been formed.
The company has passed various qualification certificates such as the three system certification (quality, environment, occupational health and safety management system), A1, A2, B level (gate valve, globe valve, check valve, regulating valve, ball valve, butterfly valve, ultra-low temperature valve, etc.) of special equipment production license qualification, API certification, EU CE certification, etc. earlier in the same industry. The company has modern testing methods including mechanical properties, spectroscopy, metallography, PT, UT, RT, MT, etc. The factory and type testing capabilities of the valve include high and low pressure water or gas testing, high and low temperature valve testing, valve fire testing, valve low leakage testing, valve switch cycle life, valve flow measurement testing, valve vacuum testing, etc. The valve testing process has obtained third-party certification certificates.
The main products produced include gate valves, globe valves, check valves, ball valves, butterfly valves, regulating valves, drain valves, instrument valves, etc; Mainly covering industries such as electricity, chemical (coal chemical/refining/fine chemical), natural gas, petrochemicals, metallurgy, nuclear power, etc. More than 2000 types and specifications of valves; Valve body materials include carbon steel, stainless steel, alloy steel, low-temperature steel, and various special materials; Pressure: 1.6MPa~80.0MPa, Class150~Class4500; The nominal Size ranges from DN10mm to 6000mm, and the temperature ranges from -196 ℃ to 1100 ℃. The driving modes include manual, gear transmission, electric, pneumatic, and hydraulic; The product adopts standards such as NB/T, GB, JB, ANSI, API, JIS, BS, DIN, GOST, NF, etc. While the company attaches great importance to domestic market sales, its products are also exported to countries such as Europe, America, Pakistan, India, Japan, Iran, Indonesia, Bangladesh, the Philippines, and Malaysia.
Adhering to the core concept of "integrity, innovation, exploration, and win-win", Shanghai Power Station Valve Factory Co., Ltd. is committed to researching valve technology for harsh working conditions, providing customers with systematic valve application solutions, and building a national brand of industrial valves!

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