Essence: A valve that is connected by internal threads and uses a rotary valve disc to achieve one-way flow. When the medium flows forward, the valve disc rotates around the axis to open, and when it flows backward, it automatically closes to prevent backflow.

Core features:

Internal thread connection: The valve body has internal threads on both ends, which can be directly screwed into the pipeline interface. The installation is compact and suitable for small-diameter (such as DN15~DN50) pipelines;

Swing design: The valve disc is fixed by a hinge shaft, opened by medium pressure, closed by gravity or reverse flow, with sensitive action and low water hammer pressure;

Low pressure application: Low flow resistance, rubber or metal hard seals are commonly used for sealing surfaces, wear-resistant, suitable for low-pressure water, gas or non corrosive media;

Convenient maintenance: The structure is simple, the valve disc is detachable, and it is easy to clean impurities or replace seals.

Typical applications: Home water supply and drainage, HVAC systems, small industrial equipment, and other scenarios that require backflow prevention and limited space.