Nuclear power check valve manufacturer

Nuclear Check valves usually rely on the flow energy of the medium itself to drive the opening and closing of the valve disc. When the medium flows downstream, the pressure of the medium pushes the valve disc open, allowing the medium to pass through normally; When the medium experiences reverse flow, the valve disc will quickly close under the action of fluid pressure and its own gravity, preventing the medium from flowing in the opposite direction and avoiding damage to nuclear power plant equipment caused by reverse flow.

Nuclear check valves are classified into various types based on functional requirements, commonly including:

Swing Check Valve:

Features: The valve disc rotates around a vertical axis, with strong flow capacity, suitable for large-diameter coolant pipelines.

Nuclear grade improvement: adding limit devices to prevent excessive opening of valve discs, using dual metal valve discs (such as stainless steel substrate+anti radiation coating) to reduce neutron activation effects.

Lift check valve:

Features: The valve disc rises and falls along the axis, with excellent sealing performance, commonly used in small-diameter pipelines that require strict backflow prevention (such as chemical additive injection pipelines).

Nuclear grade improvement: The spring is made of radiation resistant alloy (such as Incoloy 825) and equipped with a buffering mechanism to reduce water hammer impact.

Double disc check valve:

Features: Two symmetrical valve flaps open and close separately, with fast opening and closing speed and low water hammer effect, suitable for circulating water systems or emergency water supply pipelines.