The main purpose

This series of products covers the main steam, reheat, low-pressure bypass, extraction steam and other steam and water systems of 600MW to 1000MW ultra-(super) critical units, including the cut-off, drain and sewage pipelines. The pressure level can reach up to Class4680SPL, meeting the requirements of super (super) High parameter application requirements for critical units.

Features

• The valve body adopts full forging process, with uniform structure, beautiful appearance and no structural defects;

• Use the dynamic sealing principle of the concave groove labyrinth seal structure to effectively reduce the flow rate of the sealing surface at the moment of opening and closing. At the same time, the highest flow velocity position at the opening and closing moments is transferred outside the sealing surface. This avoids damage to the sealing surface caused by high flow rates when the valve is initially opened, thereby extending the service life of the valve;

• The replaceable valve seat structure is selected according to customer requirements, which is easy to disassemble and maintain, greatly reducing online maintenance time, thereby improving power plant production efficiency and reducing maintenance costs;

• A flow equalizing cover can be designed in the valve. The valve will have low noise and vibration during the initial opening period, and there will be no high-frequency vibration of the valve stem, valve core and other internal parts, thus avoiding system instability caused by local vibration, and at the same time, reasonable The gap design greatly reduces the unbalanced force on the valve core during the opening and closing process of the valve, making the valve run more smoothly;

• Driving modes are available: manual, electric, pneumatic, and other driving modes.

Main design specifications