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Low Strength: Does not withstand pressure and impact as well as materials like cast steel and stainless steel. Typically used in low- and medium-pressure systems (common operating pressure ratings include PN10/PN16, Class 125/150).

Multi-directional installation: Typically designed for horizontal or vertical installation (with upward flow), providing good adaptability (installation orientation requirements must be strictly adhered to).

A cast iron ball check valve utilizes a spherical valve core (usually a free-floating sphere) to automatically open and close under pressure, preventing backflow. Combining the advantages of cast iron with the structural features of a ball check valve, it is very useful in specific applications.

Knife gate valves are an excellent choice for low-pressure pipelines handling contaminated media such as fibers, particles, slurries, sludge, and sewage. For high-pressure applications, other more robust valve types (such as globe valves, ball valves, and gate valves) should be considered.

The maximum allowable working pressure of a valve decreases as the temperature of the medium increases. A pressure-temperature rating table is typically provided on the valve nameplate or product catalog.

Pump Outlet Protection: Prevents backflow of media from damaging the impeller when the pump is stopped. Compressor Piping: Maintains unidirectional gas flow. Water Supply System: Prevents backflow contamination in the pipeline network (DVGW certification is required to meet drinking water standards).